diff --git a/weed/admin/dash/ec_shard_management.go b/weed/admin/dash/ec_shard_management.go
index 34574ecdb..82aa4074d 100644
--- a/weed/admin/dash/ec_shard_management.go
+++ b/weed/admin/dash/ec_shard_management.go
@@ -68,7 +68,7 @@ func (s *AdminServer) GetClusterEcShards(page int, pageSize int, sortBy string,
 
 								// Create individual shard entries for each shard this server has
 								shardBits := ecShardInfo.EcIndexBits
-								for shardId := 0; shardId < erasure_coding.TotalShardsCount; shardId++ {
+								for shardId := 0; shardId < erasure_coding.MaxShardCount; shardId++ {
 									if (shardBits & (1 << uint(shardId))) != 0 {
 										// Mark this shard as present for this volume
 										volumeShardsMap[volumeId][shardId] = true
@@ -112,6 +112,7 @@ func (s *AdminServer) GetClusterEcShards(page int, pageSize int, sortBy string,
 		shardCount := len(shardsPresent)
 
 		// Find which shards are missing for this volume across ALL servers
+		// Uses default 10+4 (14 total shards)
 		for shardId := 0; shardId < erasure_coding.TotalShardsCount; shardId++ {
 			if !shardsPresent[shardId] {
 				missingShards = append(missingShards, shardId)
@@ -332,7 +333,7 @@ func (s *AdminServer) GetClusterEcVolumes(page int, pageSize int, sortBy string,
 
 								// Process each shard this server has for this volume
 								shardBits := ecShardInfo.EcIndexBits
-								for shardId := 0; shardId < erasure_coding.TotalShardsCount; shardId++ {
+								for shardId := 0; shardId < erasure_coding.MaxShardCount; shardId++ {
 									if (shardBits & (1 << uint(shardId))) != 0 {
 										// Record shard location
 										volume.ShardLocations[shardId] = node.Id
@@ -392,7 +393,7 @@ func (s *AdminServer) GetClusterEcVolumes(page int, pageSize int, sortBy string,
 	for _, volume := range volumeData {
 		volume.TotalShards = len(volume.ShardLocations)
 
-		// Find missing shards
+		// Find missing shards (default 10+4 = 14 total shards)
 		var missingShards []int
 		for shardId := 0; shardId < erasure_coding.TotalShardsCount; shardId++ {
 			if _, exists := volume.ShardLocations[shardId]; !exists {
@@ -523,7 +524,7 @@ func sortEcVolumes(volumes []EcVolumeWithShards, sortBy string, sortOrder string
 // getShardCount returns the number of shards represented by the bitmap
 func getShardCount(ecIndexBits uint32) int {
 	count := 0
-	for i := 0; i < erasure_coding.TotalShardsCount; i++ {
+	for i := 0; i < erasure_coding.MaxShardCount; i++ {
 		if (ecIndexBits & (1 << uint(i))) != 0 {
 			count++
 		}
@@ -532,6 +533,7 @@ func getShardCount(ecIndexBits uint32) int {
 }
 
 // getMissingShards returns a slice of missing shard IDs for a volume
+// Assumes default 10+4 EC configuration (14 total shards)
 func getMissingShards(ecIndexBits uint32) []int {
 	var missing []int
 	for i := 0; i < erasure_coding.TotalShardsCount; i++ {
@@ -614,7 +616,7 @@ func (s *AdminServer) GetEcVolumeDetails(volumeID uint32, sortBy string, sortOrd
 
 									// Create individual shard entries for each shard this server has
 									shardBits := ecShardInfo.EcIndexBits
-									for shardId := 0; shardId < erasure_coding.TotalShardsCount; shardId++ {
+									for shardId := 0; shardId < erasure_coding.MaxShardCount; shardId++ {
 										if (shardBits & (1 << uint(shardId))) != 0 {
 											ecShard := EcShardWithInfo{
 												VolumeID:     ecShardInfo.Id,
@@ -698,6 +700,7 @@ func (s *AdminServer) GetEcVolumeDetails(volumeID uint32, sortBy string, sortOrd
 	}
 
 	totalUniqueShards := len(foundShards)
+	// Check completeness using default 10+4 (14 total shards)
 	isComplete := (totalUniqueShards == erasure_coding.TotalShardsCount)
 
 	// Calculate missing shards
diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index fcdad30ff..d0d664f74 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -525,6 +525,13 @@ message VolumeInfo {
     int64 dat_file_size = 5; // store the original dat file size
     uint64 expire_at_sec = 6; // expiration time of ec volume
     bool read_only = 7;
+    EcShardConfig ec_shard_config = 8; // EC shard configuration (optional, null = use default 10+4)
+}
+
+// EcShardConfig specifies erasure coding shard configuration
+message EcShardConfig {
+    uint32 data_shards = 1;   // Number of data shards (e.g., 10)
+    uint32 parity_shards = 2; // Number of parity shards (e.g., 4)
 }
 message OldVersionVolumeInfo {
     repeated RemoteFile files = 1;
diff --git a/weed/pb/volume_server_pb/volume_server.pb.go b/weed/pb/volume_server_pb/volume_server.pb.go
index 503db63ef..27e791be5 100644
--- a/weed/pb/volume_server_pb/volume_server.pb.go
+++ b/weed/pb/volume_server_pb/volume_server.pb.go
@@ -4442,6 +4442,7 @@ type VolumeInfo struct {
 	DatFileSize   int64                  `protobuf:"varint,5,opt,name=dat_file_size,json=datFileSize,proto3" json:"dat_file_size,omitempty"` // store the original dat file size
 	ExpireAtSec   uint64                 `protobuf:"varint,6,opt,name=expire_at_sec,json=expireAtSec,proto3" json:"expire_at_sec,omitempty"` // expiration time of ec volume
 	ReadOnly      bool                   `protobuf:"varint,7,opt,name=read_only,json=readOnly,proto3" json:"read_only,omitempty"`
+	EcShardConfig *EcShardConfig         `protobuf:"bytes,8,opt,name=ec_shard_config,json=ecShardConfig,proto3" json:"ec_shard_config,omitempty"` // EC shard configuration (optional, null = use default 10+4)
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -4525,6 +4526,66 @@ func (x *VolumeInfo) GetReadOnly() bool {
 	return false
 }
 
+func (x *VolumeInfo) GetEcShardConfig() *EcShardConfig {
+	if x != nil {
+		return x.EcShardConfig
+	}
+	return nil
+}
+
+// EcShardConfig specifies erasure coding shard configuration
+type EcShardConfig struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	DataShards    uint32                 `protobuf:"varint,1,opt,name=data_shards,json=dataShards,proto3" json:"data_shards,omitempty"`       // Number of data shards (e.g., 10)
+	ParityShards  uint32                 `protobuf:"varint,2,opt,name=parity_shards,json=parityShards,proto3" json:"parity_shards,omitempty"` // Number of parity shards (e.g., 4)
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *EcShardConfig) Reset() {
+	*x = EcShardConfig{}
+	mi := &file_volume_server_proto_msgTypes[80]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *EcShardConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*EcShardConfig) ProtoMessage() {}
+
+func (x *EcShardConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_volume_server_proto_msgTypes[80]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use EcShardConfig.ProtoReflect.Descriptor instead.
+func (*EcShardConfig) Descriptor() ([]byte, []int) {
+	return file_volume_server_proto_rawDescGZIP(), []int{80}
+}
+
+func (x *EcShardConfig) GetDataShards() uint32 {
+	if x != nil {
+		return x.DataShards
+	}
+	return 0
+}
+
+func (x *EcShardConfig) GetParityShards() uint32 {
+	if x != nil {
+		return x.ParityShards
+	}
+	return 0
+}
+
 type OldVersionVolumeInfo struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	Files         []*RemoteFile          `protobuf:"bytes,1,rep,name=files,proto3" json:"files,omitempty"`
@@ -4540,7 +4601,7 @@ type OldVersionVolumeInfo struct {
 
 func (x *OldVersionVolumeInfo) Reset() {
 	*x = OldVersionVolumeInfo{}
-	mi := &file_volume_server_proto_msgTypes[80]
+	mi := &file_volume_server_proto_msgTypes[81]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4552,7 +4613,7 @@ func (x *OldVersionVolumeInfo) String() string {
 func (*OldVersionVolumeInfo) ProtoMessage() {}
 
 func (x *OldVersionVolumeInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[80]
+	mi := &file_volume_server_proto_msgTypes[81]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4565,7 +4626,7 @@ func (x *OldVersionVolumeInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use OldVersionVolumeInfo.ProtoReflect.Descriptor instead.
 func (*OldVersionVolumeInfo) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{80}
+	return file_volume_server_proto_rawDescGZIP(), []int{81}
 }
 
 func (x *OldVersionVolumeInfo) GetFiles() []*RemoteFile {
@@ -4630,7 +4691,7 @@ type VolumeTierMoveDatToRemoteRequest struct {
 
 func (x *VolumeTierMoveDatToRemoteRequest) Reset() {
 	*x = VolumeTierMoveDatToRemoteRequest{}
-	mi := &file_volume_server_proto_msgTypes[81]
+	mi := &file_volume_server_proto_msgTypes[82]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4642,7 +4703,7 @@ func (x *VolumeTierMoveDatToRemoteRequest) String() string {
 func (*VolumeTierMoveDatToRemoteRequest) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatToRemoteRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[81]
+	mi := &file_volume_server_proto_msgTypes[82]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4655,7 +4716,7 @@ func (x *VolumeTierMoveDatToRemoteRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeTierMoveDatToRemoteRequest.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatToRemoteRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{81}
+	return file_volume_server_proto_rawDescGZIP(), []int{82}
 }
 
 func (x *VolumeTierMoveDatToRemoteRequest) GetVolumeId() uint32 {
@@ -4696,7 +4757,7 @@ type VolumeTierMoveDatToRemoteResponse struct {
 
 func (x *VolumeTierMoveDatToRemoteResponse) Reset() {
 	*x = VolumeTierMoveDatToRemoteResponse{}
-	mi := &file_volume_server_proto_msgTypes[82]
+	mi := &file_volume_server_proto_msgTypes[83]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4708,7 +4769,7 @@ func (x *VolumeTierMoveDatToRemoteResponse) String() string {
 func (*VolumeTierMoveDatToRemoteResponse) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatToRemoteResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[82]
+	mi := &file_volume_server_proto_msgTypes[83]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4721,7 +4782,7 @@ func (x *VolumeTierMoveDatToRemoteResponse) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use VolumeTierMoveDatToRemoteResponse.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatToRemoteResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{82}
+	return file_volume_server_proto_rawDescGZIP(), []int{83}
 }
 
 func (x *VolumeTierMoveDatToRemoteResponse) GetProcessed() int64 {
@@ -4749,7 +4810,7 @@ type VolumeTierMoveDatFromRemoteRequest struct {
 
 func (x *VolumeTierMoveDatFromRemoteRequest) Reset() {
 	*x = VolumeTierMoveDatFromRemoteRequest{}
-	mi := &file_volume_server_proto_msgTypes[83]
+	mi := &file_volume_server_proto_msgTypes[84]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4761,7 +4822,7 @@ func (x *VolumeTierMoveDatFromRemoteRequest) String() string {
 func (*VolumeTierMoveDatFromRemoteRequest) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatFromRemoteRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[83]
+	mi := &file_volume_server_proto_msgTypes[84]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4774,7 +4835,7 @@ func (x *VolumeTierMoveDatFromRemoteRequest) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use VolumeTierMoveDatFromRemoteRequest.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatFromRemoteRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{83}
+	return file_volume_server_proto_rawDescGZIP(), []int{84}
 }
 
 func (x *VolumeTierMoveDatFromRemoteRequest) GetVolumeId() uint32 {
@@ -4808,7 +4869,7 @@ type VolumeTierMoveDatFromRemoteResponse struct {
 
 func (x *VolumeTierMoveDatFromRemoteResponse) Reset() {
 	*x = VolumeTierMoveDatFromRemoteResponse{}
-	mi := &file_volume_server_proto_msgTypes[84]
+	mi := &file_volume_server_proto_msgTypes[85]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4820,7 +4881,7 @@ func (x *VolumeTierMoveDatFromRemoteResponse) String() string {
 func (*VolumeTierMoveDatFromRemoteResponse) ProtoMessage() {}
 
 func (x *VolumeTierMoveDatFromRemoteResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[84]
+	mi := &file_volume_server_proto_msgTypes[85]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4833,7 +4894,7 @@ func (x *VolumeTierMoveDatFromRemoteResponse) ProtoReflect() protoreflect.Messag
 
 // Deprecated: Use VolumeTierMoveDatFromRemoteResponse.ProtoReflect.Descriptor instead.
 func (*VolumeTierMoveDatFromRemoteResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{84}
+	return file_volume_server_proto_rawDescGZIP(), []int{85}
 }
 
 func (x *VolumeTierMoveDatFromRemoteResponse) GetProcessed() int64 {
@@ -4858,7 +4919,7 @@ type VolumeServerStatusRequest struct {
 
 func (x *VolumeServerStatusRequest) Reset() {
 	*x = VolumeServerStatusRequest{}
-	mi := &file_volume_server_proto_msgTypes[85]
+	mi := &file_volume_server_proto_msgTypes[86]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4870,7 +4931,7 @@ func (x *VolumeServerStatusRequest) String() string {
 func (*VolumeServerStatusRequest) ProtoMessage() {}
 
 func (x *VolumeServerStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[85]
+	mi := &file_volume_server_proto_msgTypes[86]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4883,7 +4944,7 @@ func (x *VolumeServerStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeServerStatusRequest.ProtoReflect.Descriptor instead.
 func (*VolumeServerStatusRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{85}
+	return file_volume_server_proto_rawDescGZIP(), []int{86}
 }
 
 type VolumeServerStatusResponse struct {
@@ -4899,7 +4960,7 @@ type VolumeServerStatusResponse struct {
 
 func (x *VolumeServerStatusResponse) Reset() {
 	*x = VolumeServerStatusResponse{}
-	mi := &file_volume_server_proto_msgTypes[86]
+	mi := &file_volume_server_proto_msgTypes[87]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4911,7 +4972,7 @@ func (x *VolumeServerStatusResponse) String() string {
 func (*VolumeServerStatusResponse) ProtoMessage() {}
 
 func (x *VolumeServerStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[86]
+	mi := &file_volume_server_proto_msgTypes[87]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4924,7 +4985,7 @@ func (x *VolumeServerStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeServerStatusResponse.ProtoReflect.Descriptor instead.
 func (*VolumeServerStatusResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{86}
+	return file_volume_server_proto_rawDescGZIP(), []int{87}
 }
 
 func (x *VolumeServerStatusResponse) GetDiskStatuses() []*DiskStatus {
@@ -4970,7 +5031,7 @@ type VolumeServerLeaveRequest struct {
 
 func (x *VolumeServerLeaveRequest) Reset() {
 	*x = VolumeServerLeaveRequest{}
-	mi := &file_volume_server_proto_msgTypes[87]
+	mi := &file_volume_server_proto_msgTypes[88]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -4982,7 +5043,7 @@ func (x *VolumeServerLeaveRequest) String() string {
 func (*VolumeServerLeaveRequest) ProtoMessage() {}
 
 func (x *VolumeServerLeaveRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[87]
+	mi := &file_volume_server_proto_msgTypes[88]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4995,7 +5056,7 @@ func (x *VolumeServerLeaveRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeServerLeaveRequest.ProtoReflect.Descriptor instead.
 func (*VolumeServerLeaveRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{87}
+	return file_volume_server_proto_rawDescGZIP(), []int{88}
 }
 
 type VolumeServerLeaveResponse struct {
@@ -5006,7 +5067,7 @@ type VolumeServerLeaveResponse struct {
 
 func (x *VolumeServerLeaveResponse) Reset() {
 	*x = VolumeServerLeaveResponse{}
-	mi := &file_volume_server_proto_msgTypes[88]
+	mi := &file_volume_server_proto_msgTypes[89]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5018,7 +5079,7 @@ func (x *VolumeServerLeaveResponse) String() string {
 func (*VolumeServerLeaveResponse) ProtoMessage() {}
 
 func (x *VolumeServerLeaveResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[88]
+	mi := &file_volume_server_proto_msgTypes[89]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5031,7 +5092,7 @@ func (x *VolumeServerLeaveResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeServerLeaveResponse.ProtoReflect.Descriptor instead.
 func (*VolumeServerLeaveResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{88}
+	return file_volume_server_proto_rawDescGZIP(), []int{89}
 }
 
 // remote storage
@@ -5053,7 +5114,7 @@ type FetchAndWriteNeedleRequest struct {
 
 func (x *FetchAndWriteNeedleRequest) Reset() {
 	*x = FetchAndWriteNeedleRequest{}
-	mi := &file_volume_server_proto_msgTypes[89]
+	mi := &file_volume_server_proto_msgTypes[90]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5065,7 +5126,7 @@ func (x *FetchAndWriteNeedleRequest) String() string {
 func (*FetchAndWriteNeedleRequest) ProtoMessage() {}
 
 func (x *FetchAndWriteNeedleRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[89]
+	mi := &file_volume_server_proto_msgTypes[90]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5078,7 +5139,7 @@ func (x *FetchAndWriteNeedleRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FetchAndWriteNeedleRequest.ProtoReflect.Descriptor instead.
 func (*FetchAndWriteNeedleRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{89}
+	return file_volume_server_proto_rawDescGZIP(), []int{90}
 }
 
 func (x *FetchAndWriteNeedleRequest) GetVolumeId() uint32 {
@@ -5153,7 +5214,7 @@ type FetchAndWriteNeedleResponse struct {
 
 func (x *FetchAndWriteNeedleResponse) Reset() {
 	*x = FetchAndWriteNeedleResponse{}
-	mi := &file_volume_server_proto_msgTypes[90]
+	mi := &file_volume_server_proto_msgTypes[91]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5165,7 +5226,7 @@ func (x *FetchAndWriteNeedleResponse) String() string {
 func (*FetchAndWriteNeedleResponse) ProtoMessage() {}
 
 func (x *FetchAndWriteNeedleResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[90]
+	mi := &file_volume_server_proto_msgTypes[91]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5178,7 +5239,7 @@ func (x *FetchAndWriteNeedleResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FetchAndWriteNeedleResponse.ProtoReflect.Descriptor instead.
 func (*FetchAndWriteNeedleResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{90}
+	return file_volume_server_proto_rawDescGZIP(), []int{91}
 }
 
 func (x *FetchAndWriteNeedleResponse) GetETag() string {
@@ -5202,7 +5263,7 @@ type QueryRequest struct {
 
 func (x *QueryRequest) Reset() {
 	*x = QueryRequest{}
-	mi := &file_volume_server_proto_msgTypes[91]
+	mi := &file_volume_server_proto_msgTypes[92]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5214,7 +5275,7 @@ func (x *QueryRequest) String() string {
 func (*QueryRequest) ProtoMessage() {}
 
 func (x *QueryRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[91]
+	mi := &file_volume_server_proto_msgTypes[92]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5227,7 +5288,7 @@ func (x *QueryRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest.ProtoReflect.Descriptor instead.
 func (*QueryRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91}
+	return file_volume_server_proto_rawDescGZIP(), []int{92}
 }
 
 func (x *QueryRequest) GetSelections() []string {
@@ -5274,7 +5335,7 @@ type QueriedStripe struct {
 
 func (x *QueriedStripe) Reset() {
 	*x = QueriedStripe{}
-	mi := &file_volume_server_proto_msgTypes[92]
+	mi := &file_volume_server_proto_msgTypes[93]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5286,7 +5347,7 @@ func (x *QueriedStripe) String() string {
 func (*QueriedStripe) ProtoMessage() {}
 
 func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[92]
+	mi := &file_volume_server_proto_msgTypes[93]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5299,7 +5360,7 @@ func (x *QueriedStripe) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueriedStripe.ProtoReflect.Descriptor instead.
 func (*QueriedStripe) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{92}
+	return file_volume_server_proto_rawDescGZIP(), []int{93}
 }
 
 func (x *QueriedStripe) GetRecords() []byte {
@@ -5319,7 +5380,7 @@ type VolumeNeedleStatusRequest struct {
 
 func (x *VolumeNeedleStatusRequest) Reset() {
 	*x = VolumeNeedleStatusRequest{}
-	mi := &file_volume_server_proto_msgTypes[93]
+	mi := &file_volume_server_proto_msgTypes[94]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5331,7 +5392,7 @@ func (x *VolumeNeedleStatusRequest) String() string {
 func (*VolumeNeedleStatusRequest) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[93]
+	mi := &file_volume_server_proto_msgTypes[94]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5344,7 +5405,7 @@ func (x *VolumeNeedleStatusRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusRequest.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{93}
+	return file_volume_server_proto_rawDescGZIP(), []int{94}
 }
 
 func (x *VolumeNeedleStatusRequest) GetVolumeId() uint32 {
@@ -5375,7 +5436,7 @@ type VolumeNeedleStatusResponse struct {
 
 func (x *VolumeNeedleStatusResponse) Reset() {
 	*x = VolumeNeedleStatusResponse{}
-	mi := &file_volume_server_proto_msgTypes[94]
+	mi := &file_volume_server_proto_msgTypes[95]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5387,7 +5448,7 @@ func (x *VolumeNeedleStatusResponse) String() string {
 func (*VolumeNeedleStatusResponse) ProtoMessage() {}
 
 func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[94]
+	mi := &file_volume_server_proto_msgTypes[95]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5400,7 +5461,7 @@ func (x *VolumeNeedleStatusResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use VolumeNeedleStatusResponse.ProtoReflect.Descriptor instead.
 func (*VolumeNeedleStatusResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{94}
+	return file_volume_server_proto_rawDescGZIP(), []int{95}
 }
 
 func (x *VolumeNeedleStatusResponse) GetNeedleId() uint64 {
@@ -5455,7 +5516,7 @@ type PingRequest struct {
 
 func (x *PingRequest) Reset() {
 	*x = PingRequest{}
-	mi := &file_volume_server_proto_msgTypes[95]
+	mi := &file_volume_server_proto_msgTypes[96]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5467,7 +5528,7 @@ func (x *PingRequest) String() string {
 func (*PingRequest) ProtoMessage() {}
 
 func (x *PingRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[95]
+	mi := &file_volume_server_proto_msgTypes[96]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5480,7 +5541,7 @@ func (x *PingRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PingRequest.ProtoReflect.Descriptor instead.
 func (*PingRequest) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{95}
+	return file_volume_server_proto_rawDescGZIP(), []int{96}
 }
 
 func (x *PingRequest) GetTarget() string {
@@ -5508,7 +5569,7 @@ type PingResponse struct {
 
 func (x *PingResponse) Reset() {
 	*x = PingResponse{}
-	mi := &file_volume_server_proto_msgTypes[96]
+	mi := &file_volume_server_proto_msgTypes[97]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5520,7 +5581,7 @@ func (x *PingResponse) String() string {
 func (*PingResponse) ProtoMessage() {}
 
 func (x *PingResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[96]
+	mi := &file_volume_server_proto_msgTypes[97]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5533,7 +5594,7 @@ func (x *PingResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PingResponse.ProtoReflect.Descriptor instead.
 func (*PingResponse) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{96}
+	return file_volume_server_proto_rawDescGZIP(), []int{97}
 }
 
 func (x *PingResponse) GetStartTimeNs() int64 {
@@ -5568,7 +5629,7 @@ type FetchAndWriteNeedleRequest_Replica struct {
 
 func (x *FetchAndWriteNeedleRequest_Replica) Reset() {
 	*x = FetchAndWriteNeedleRequest_Replica{}
-	mi := &file_volume_server_proto_msgTypes[97]
+	mi := &file_volume_server_proto_msgTypes[98]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5580,7 +5641,7 @@ func (x *FetchAndWriteNeedleRequest_Replica) String() string {
 func (*FetchAndWriteNeedleRequest_Replica) ProtoMessage() {}
 
 func (x *FetchAndWriteNeedleRequest_Replica) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[97]
+	mi := &file_volume_server_proto_msgTypes[98]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5593,7 +5654,7 @@ func (x *FetchAndWriteNeedleRequest_Replica) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use FetchAndWriteNeedleRequest_Replica.ProtoReflect.Descriptor instead.
 func (*FetchAndWriteNeedleRequest_Replica) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{89, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{90, 0}
 }
 
 func (x *FetchAndWriteNeedleRequest_Replica) GetUrl() string {
@@ -5628,7 +5689,7 @@ type QueryRequest_Filter struct {
 
 func (x *QueryRequest_Filter) Reset() {
 	*x = QueryRequest_Filter{}
-	mi := &file_volume_server_proto_msgTypes[98]
+	mi := &file_volume_server_proto_msgTypes[99]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5640,7 +5701,7 @@ func (x *QueryRequest_Filter) String() string {
 func (*QueryRequest_Filter) ProtoMessage() {}
 
 func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[98]
+	mi := &file_volume_server_proto_msgTypes[99]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5653,7 +5714,7 @@ func (x *QueryRequest_Filter) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_Filter.ProtoReflect.Descriptor instead.
 func (*QueryRequest_Filter) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 0}
 }
 
 func (x *QueryRequest_Filter) GetField() string {
@@ -5690,7 +5751,7 @@ type QueryRequest_InputSerialization struct {
 
 func (x *QueryRequest_InputSerialization) Reset() {
 	*x = QueryRequest_InputSerialization{}
-	mi := &file_volume_server_proto_msgTypes[99]
+	mi := &file_volume_server_proto_msgTypes[100]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5702,7 +5763,7 @@ func (x *QueryRequest_InputSerialization) String() string {
 func (*QueryRequest_InputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[99]
+	mi := &file_volume_server_proto_msgTypes[100]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5715,7 +5776,7 @@ func (x *QueryRequest_InputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_InputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 1}
 }
 
 func (x *QueryRequest_InputSerialization) GetCompressionType() string {
@@ -5756,7 +5817,7 @@ type QueryRequest_OutputSerialization struct {
 
 func (x *QueryRequest_OutputSerialization) Reset() {
 	*x = QueryRequest_OutputSerialization{}
-	mi := &file_volume_server_proto_msgTypes[100]
+	mi := &file_volume_server_proto_msgTypes[101]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5768,7 +5829,7 @@ func (x *QueryRequest_OutputSerialization) String() string {
 func (*QueryRequest_OutputSerialization) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[100]
+	mi := &file_volume_server_proto_msgTypes[101]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5781,7 +5842,7 @@ func (x *QueryRequest_OutputSerialization) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use QueryRequest_OutputSerialization.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 2}
 }
 
 func (x *QueryRequest_OutputSerialization) GetCsvOutput() *QueryRequest_OutputSerialization_CSVOutput {
@@ -5814,7 +5875,7 @@ type QueryRequest_InputSerialization_CSVInput struct {
 
 func (x *QueryRequest_InputSerialization_CSVInput) Reset() {
 	*x = QueryRequest_InputSerialization_CSVInput{}
-	mi := &file_volume_server_proto_msgTypes[101]
+	mi := &file_volume_server_proto_msgTypes[102]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5826,7 +5887,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) String() string {
 func (*QueryRequest_InputSerialization_CSVInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[101]
+	mi := &file_volume_server_proto_msgTypes[102]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5839,7 +5900,7 @@ func (x *QueryRequest_InputSerialization_CSVInput) ProtoReflect() protoreflect.M
 
 // Deprecated: Use QueryRequest_InputSerialization_CSVInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_CSVInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 1, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 1, 0}
 }
 
 func (x *QueryRequest_InputSerialization_CSVInput) GetFileHeaderInfo() string {
@@ -5900,7 +5961,7 @@ type QueryRequest_InputSerialization_JSONInput struct {
 
 func (x *QueryRequest_InputSerialization_JSONInput) Reset() {
 	*x = QueryRequest_InputSerialization_JSONInput{}
-	mi := &file_volume_server_proto_msgTypes[102]
+	mi := &file_volume_server_proto_msgTypes[103]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5912,7 +5973,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) String() string {
 func (*QueryRequest_InputSerialization_JSONInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[102]
+	mi := &file_volume_server_proto_msgTypes[103]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5925,7 +5986,7 @@ func (x *QueryRequest_InputSerialization_JSONInput) ProtoReflect() protoreflect.
 
 // Deprecated: Use QueryRequest_InputSerialization_JSONInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_JSONInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 1, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 1, 1}
 }
 
 func (x *QueryRequest_InputSerialization_JSONInput) GetType() string {
@@ -5943,7 +6004,7 @@ type QueryRequest_InputSerialization_ParquetInput struct {
 
 func (x *QueryRequest_InputSerialization_ParquetInput) Reset() {
 	*x = QueryRequest_InputSerialization_ParquetInput{}
-	mi := &file_volume_server_proto_msgTypes[103]
+	mi := &file_volume_server_proto_msgTypes[104]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5955,7 +6016,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) String() string {
 func (*QueryRequest_InputSerialization_ParquetInput) ProtoMessage() {}
 
 func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[103]
+	mi := &file_volume_server_proto_msgTypes[104]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -5968,7 +6029,7 @@ func (x *QueryRequest_InputSerialization_ParquetInput) ProtoReflect() protorefle
 
 // Deprecated: Use QueryRequest_InputSerialization_ParquetInput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_InputSerialization_ParquetInput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 1, 2}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 1, 2}
 }
 
 type QueryRequest_OutputSerialization_CSVOutput struct {
@@ -5984,7 +6045,7 @@ type QueryRequest_OutputSerialization_CSVOutput struct {
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_CSVOutput{}
-	mi := &file_volume_server_proto_msgTypes[104]
+	mi := &file_volume_server_proto_msgTypes[105]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -5996,7 +6057,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) String() string {
 func (*QueryRequest_OutputSerialization_CSVOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[104]
+	mi := &file_volume_server_proto_msgTypes[105]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -6009,7 +6070,7 @@ func (x *QueryRequest_OutputSerialization_CSVOutput) ProtoReflect() protoreflect
 
 // Deprecated: Use QueryRequest_OutputSerialization_CSVOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_CSVOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 2, 0}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 2, 0}
 }
 
 func (x *QueryRequest_OutputSerialization_CSVOutput) GetQuoteFields() string {
@@ -6056,7 +6117,7 @@ type QueryRequest_OutputSerialization_JSONOutput struct {
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) Reset() {
 	*x = QueryRequest_OutputSerialization_JSONOutput{}
-	mi := &file_volume_server_proto_msgTypes[105]
+	mi := &file_volume_server_proto_msgTypes[106]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -6068,7 +6129,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) String() string {
 func (*QueryRequest_OutputSerialization_JSONOutput) ProtoMessage() {}
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflect.Message {
-	mi := &file_volume_server_proto_msgTypes[105]
+	mi := &file_volume_server_proto_msgTypes[106]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -6081,7 +6142,7 @@ func (x *QueryRequest_OutputSerialization_JSONOutput) ProtoReflect() protoreflec
 
 // Deprecated: Use QueryRequest_OutputSerialization_JSONOutput.ProtoReflect.Descriptor instead.
 func (*QueryRequest_OutputSerialization_JSONOutput) Descriptor() ([]byte, []int) {
-	return file_volume_server_proto_rawDescGZIP(), []int{91, 2, 1}
+	return file_volume_server_proto_rawDescGZIP(), []int{92, 2, 1}
 }
 
 func (x *QueryRequest_OutputSerialization_JSONOutput) GetRecordDelimiter() string {
@@ -6423,7 +6484,7 @@ const file_volume_server_proto_rawDesc = "" +
 	"\x06offset\x18\x04 \x01(\x04R\x06offset\x12\x1b\n" +
 	"\tfile_size\x18\x05 \x01(\x04R\bfileSize\x12#\n" +
 	"\rmodified_time\x18\x06 \x01(\x04R\fmodifiedTime\x12\x1c\n" +
-	"\textension\x18\a \x01(\tR\textension\"\x84\x02\n" +
+	"\textension\x18\a \x01(\tR\textension\"\xcd\x02\n" +
 	"\n" +
 	"VolumeInfo\x122\n" +
 	"\x05files\x18\x01 \x03(\v2\x1c.volume_server_pb.RemoteFileR\x05files\x12\x18\n" +
@@ -6432,7 +6493,12 @@ const file_volume_server_proto_rawDesc = "" +
 	"\fbytes_offset\x18\x04 \x01(\rR\vbytesOffset\x12\"\n" +
 	"\rdat_file_size\x18\x05 \x01(\x03R\vdatFileSize\x12\"\n" +
 	"\rexpire_at_sec\x18\x06 \x01(\x04R\vexpireAtSec\x12\x1b\n" +
-	"\tread_only\x18\a \x01(\bR\breadOnly\"\x8b\x02\n" +
+	"\tread_only\x18\a \x01(\bR\breadOnly\x12G\n" +
+	"\x0fec_shard_config\x18\b \x01(\v2\x1f.volume_server_pb.EcShardConfigR\recShardConfig\"U\n" +
+	"\rEcShardConfig\x12\x1f\n" +
+	"\vdata_shards\x18\x01 \x01(\rR\n" +
+	"dataShards\x12#\n" +
+	"\rparity_shards\x18\x02 \x01(\rR\fparityShards\"\x8b\x02\n" +
 	"\x14OldVersionVolumeInfo\x122\n" +
 	"\x05files\x18\x01 \x03(\v2\x1c.volume_server_pb.RemoteFileR\x05files\x12\x18\n" +
 	"\aversion\x18\x02 \x01(\rR\aversion\x12 \n" +
@@ -6611,7 +6677,7 @@ func file_volume_server_proto_rawDescGZIP() []byte {
 	return file_volume_server_proto_rawDescData
 }
 
-var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 106)
+var file_volume_server_proto_msgTypes = make([]protoimpl.MessageInfo, 107)
 var file_volume_server_proto_goTypes = []any{
 	(*BatchDeleteRequest)(nil),                           // 0: volume_server_pb.BatchDeleteRequest
 	(*BatchDeleteResponse)(nil),                          // 1: volume_server_pb.BatchDeleteResponse
@@ -6693,34 +6759,35 @@ var file_volume_server_proto_goTypes = []any{
 	(*MemStatus)(nil),                                    // 77: volume_server_pb.MemStatus
 	(*RemoteFile)(nil),                                   // 78: volume_server_pb.RemoteFile
 	(*VolumeInfo)(nil),                                   // 79: volume_server_pb.VolumeInfo
-	(*OldVersionVolumeInfo)(nil),                         // 80: volume_server_pb.OldVersionVolumeInfo
-	(*VolumeTierMoveDatToRemoteRequest)(nil),             // 81: volume_server_pb.VolumeTierMoveDatToRemoteRequest
-	(*VolumeTierMoveDatToRemoteResponse)(nil),            // 82: volume_server_pb.VolumeTierMoveDatToRemoteResponse
-	(*VolumeTierMoveDatFromRemoteRequest)(nil),           // 83: volume_server_pb.VolumeTierMoveDatFromRemoteRequest
-	(*VolumeTierMoveDatFromRemoteResponse)(nil),          // 84: volume_server_pb.VolumeTierMoveDatFromRemoteResponse
-	(*VolumeServerStatusRequest)(nil),                    // 85: volume_server_pb.VolumeServerStatusRequest
-	(*VolumeServerStatusResponse)(nil),                   // 86: volume_server_pb.VolumeServerStatusResponse
-	(*VolumeServerLeaveRequest)(nil),                     // 87: volume_server_pb.VolumeServerLeaveRequest
-	(*VolumeServerLeaveResponse)(nil),                    // 88: volume_server_pb.VolumeServerLeaveResponse
-	(*FetchAndWriteNeedleRequest)(nil),                   // 89: volume_server_pb.FetchAndWriteNeedleRequest
-	(*FetchAndWriteNeedleResponse)(nil),                  // 90: volume_server_pb.FetchAndWriteNeedleResponse
-	(*QueryRequest)(nil),                                 // 91: volume_server_pb.QueryRequest
-	(*QueriedStripe)(nil),                                // 92: volume_server_pb.QueriedStripe
-	(*VolumeNeedleStatusRequest)(nil),                    // 93: volume_server_pb.VolumeNeedleStatusRequest
-	(*VolumeNeedleStatusResponse)(nil),                   // 94: volume_server_pb.VolumeNeedleStatusResponse
-	(*PingRequest)(nil),                                  // 95: volume_server_pb.PingRequest
-	(*PingResponse)(nil),                                 // 96: volume_server_pb.PingResponse
-	(*FetchAndWriteNeedleRequest_Replica)(nil),           // 97: volume_server_pb.FetchAndWriteNeedleRequest.Replica
-	(*QueryRequest_Filter)(nil),                          // 98: volume_server_pb.QueryRequest.Filter
-	(*QueryRequest_InputSerialization)(nil),              // 99: volume_server_pb.QueryRequest.InputSerialization
-	(*QueryRequest_OutputSerialization)(nil),             // 100: volume_server_pb.QueryRequest.OutputSerialization
-	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 101: volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 102: volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 103: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 104: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 105: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
-	(*remote_pb.RemoteConf)(nil),                         // 106: remote_pb.RemoteConf
-	(*remote_pb.RemoteStorageLocation)(nil),              // 107: remote_pb.RemoteStorageLocation
+	(*EcShardConfig)(nil),                                // 80: volume_server_pb.EcShardConfig
+	(*OldVersionVolumeInfo)(nil),                         // 81: volume_server_pb.OldVersionVolumeInfo
+	(*VolumeTierMoveDatToRemoteRequest)(nil),             // 82: volume_server_pb.VolumeTierMoveDatToRemoteRequest
+	(*VolumeTierMoveDatToRemoteResponse)(nil),            // 83: volume_server_pb.VolumeTierMoveDatToRemoteResponse
+	(*VolumeTierMoveDatFromRemoteRequest)(nil),           // 84: volume_server_pb.VolumeTierMoveDatFromRemoteRequest
+	(*VolumeTierMoveDatFromRemoteResponse)(nil),          // 85: volume_server_pb.VolumeTierMoveDatFromRemoteResponse
+	(*VolumeServerStatusRequest)(nil),                    // 86: volume_server_pb.VolumeServerStatusRequest
+	(*VolumeServerStatusResponse)(nil),                   // 87: volume_server_pb.VolumeServerStatusResponse
+	(*VolumeServerLeaveRequest)(nil),                     // 88: volume_server_pb.VolumeServerLeaveRequest
+	(*VolumeServerLeaveResponse)(nil),                    // 89: volume_server_pb.VolumeServerLeaveResponse
+	(*FetchAndWriteNeedleRequest)(nil),                   // 90: volume_server_pb.FetchAndWriteNeedleRequest
+	(*FetchAndWriteNeedleResponse)(nil),                  // 91: volume_server_pb.FetchAndWriteNeedleResponse
+	(*QueryRequest)(nil),                                 // 92: volume_server_pb.QueryRequest
+	(*QueriedStripe)(nil),                                // 93: volume_server_pb.QueriedStripe
+	(*VolumeNeedleStatusRequest)(nil),                    // 94: volume_server_pb.VolumeNeedleStatusRequest
+	(*VolumeNeedleStatusResponse)(nil),                   // 95: volume_server_pb.VolumeNeedleStatusResponse
+	(*PingRequest)(nil),                                  // 96: volume_server_pb.PingRequest
+	(*PingResponse)(nil),                                 // 97: volume_server_pb.PingResponse
+	(*FetchAndWriteNeedleRequest_Replica)(nil),           // 98: volume_server_pb.FetchAndWriteNeedleRequest.Replica
+	(*QueryRequest_Filter)(nil),                          // 99: volume_server_pb.QueryRequest.Filter
+	(*QueryRequest_InputSerialization)(nil),              // 100: volume_server_pb.QueryRequest.InputSerialization
+	(*QueryRequest_OutputSerialization)(nil),             // 101: volume_server_pb.QueryRequest.OutputSerialization
+	(*QueryRequest_InputSerialization_CSVInput)(nil),     // 102: volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	(*QueryRequest_InputSerialization_JSONInput)(nil),    // 103: volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	(*QueryRequest_InputSerialization_ParquetInput)(nil), // 104: volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	(*QueryRequest_OutputSerialization_CSVOutput)(nil),   // 105: volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	(*QueryRequest_OutputSerialization_JSONOutput)(nil),  // 106: volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	(*remote_pb.RemoteConf)(nil),                         // 107: remote_pb.RemoteConf
+	(*remote_pb.RemoteStorageLocation)(nil),              // 108: remote_pb.RemoteStorageLocation
 }
 var file_volume_server_proto_depIdxs = []int32{
 	2,   // 0: volume_server_pb.BatchDeleteResponse.results:type_name -> volume_server_pb.DeleteResult
@@ -6728,113 +6795,114 @@ var file_volume_server_proto_depIdxs = []int32{
 	73,  // 2: volume_server_pb.VolumeEcShardsInfoResponse.ec_shard_infos:type_name -> volume_server_pb.EcShardInfo
 	79,  // 3: volume_server_pb.ReadVolumeFileStatusResponse.volume_info:type_name -> volume_server_pb.VolumeInfo
 	78,  // 4: volume_server_pb.VolumeInfo.files:type_name -> volume_server_pb.RemoteFile
-	78,  // 5: volume_server_pb.OldVersionVolumeInfo.files:type_name -> volume_server_pb.RemoteFile
-	76,  // 6: volume_server_pb.VolumeServerStatusResponse.disk_statuses:type_name -> volume_server_pb.DiskStatus
-	77,  // 7: volume_server_pb.VolumeServerStatusResponse.memory_status:type_name -> volume_server_pb.MemStatus
-	97,  // 8: volume_server_pb.FetchAndWriteNeedleRequest.replicas:type_name -> volume_server_pb.FetchAndWriteNeedleRequest.Replica
-	106, // 9: volume_server_pb.FetchAndWriteNeedleRequest.remote_conf:type_name -> remote_pb.RemoteConf
-	107, // 10: volume_server_pb.FetchAndWriteNeedleRequest.remote_location:type_name -> remote_pb.RemoteStorageLocation
-	98,  // 11: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
-	99,  // 12: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
-	100, // 13: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
-	101, // 14: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
-	102, // 15: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
-	103, // 16: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
-	104, // 17: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
-	105, // 18: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
-	0,   // 19: volume_server_pb.VolumeServer.BatchDelete:input_type -> volume_server_pb.BatchDeleteRequest
-	4,   // 20: volume_server_pb.VolumeServer.VacuumVolumeCheck:input_type -> volume_server_pb.VacuumVolumeCheckRequest
-	6,   // 21: volume_server_pb.VolumeServer.VacuumVolumeCompact:input_type -> volume_server_pb.VacuumVolumeCompactRequest
-	8,   // 22: volume_server_pb.VolumeServer.VacuumVolumeCommit:input_type -> volume_server_pb.VacuumVolumeCommitRequest
-	10,  // 23: volume_server_pb.VolumeServer.VacuumVolumeCleanup:input_type -> volume_server_pb.VacuumVolumeCleanupRequest
-	12,  // 24: volume_server_pb.VolumeServer.DeleteCollection:input_type -> volume_server_pb.DeleteCollectionRequest
-	14,  // 25: volume_server_pb.VolumeServer.AllocateVolume:input_type -> volume_server_pb.AllocateVolumeRequest
-	16,  // 26: volume_server_pb.VolumeServer.VolumeSyncStatus:input_type -> volume_server_pb.VolumeSyncStatusRequest
-	18,  // 27: volume_server_pb.VolumeServer.VolumeIncrementalCopy:input_type -> volume_server_pb.VolumeIncrementalCopyRequest
-	20,  // 28: volume_server_pb.VolumeServer.VolumeMount:input_type -> volume_server_pb.VolumeMountRequest
-	22,  // 29: volume_server_pb.VolumeServer.VolumeUnmount:input_type -> volume_server_pb.VolumeUnmountRequest
-	24,  // 30: volume_server_pb.VolumeServer.VolumeDelete:input_type -> volume_server_pb.VolumeDeleteRequest
-	26,  // 31: volume_server_pb.VolumeServer.VolumeMarkReadonly:input_type -> volume_server_pb.VolumeMarkReadonlyRequest
-	28,  // 32: volume_server_pb.VolumeServer.VolumeMarkWritable:input_type -> volume_server_pb.VolumeMarkWritableRequest
-	30,  // 33: volume_server_pb.VolumeServer.VolumeConfigure:input_type -> volume_server_pb.VolumeConfigureRequest
-	32,  // 34: volume_server_pb.VolumeServer.VolumeStatus:input_type -> volume_server_pb.VolumeStatusRequest
-	34,  // 35: volume_server_pb.VolumeServer.VolumeCopy:input_type -> volume_server_pb.VolumeCopyRequest
-	74,  // 36: volume_server_pb.VolumeServer.ReadVolumeFileStatus:input_type -> volume_server_pb.ReadVolumeFileStatusRequest
-	36,  // 37: volume_server_pb.VolumeServer.CopyFile:input_type -> volume_server_pb.CopyFileRequest
-	38,  // 38: volume_server_pb.VolumeServer.ReceiveFile:input_type -> volume_server_pb.ReceiveFileRequest
-	41,  // 39: volume_server_pb.VolumeServer.ReadNeedleBlob:input_type -> volume_server_pb.ReadNeedleBlobRequest
-	43,  // 40: volume_server_pb.VolumeServer.ReadNeedleMeta:input_type -> volume_server_pb.ReadNeedleMetaRequest
-	45,  // 41: volume_server_pb.VolumeServer.WriteNeedleBlob:input_type -> volume_server_pb.WriteNeedleBlobRequest
-	47,  // 42: volume_server_pb.VolumeServer.ReadAllNeedles:input_type -> volume_server_pb.ReadAllNeedlesRequest
-	49,  // 43: volume_server_pb.VolumeServer.VolumeTailSender:input_type -> volume_server_pb.VolumeTailSenderRequest
-	51,  // 44: volume_server_pb.VolumeServer.VolumeTailReceiver:input_type -> volume_server_pb.VolumeTailReceiverRequest
-	53,  // 45: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:input_type -> volume_server_pb.VolumeEcShardsGenerateRequest
-	55,  // 46: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:input_type -> volume_server_pb.VolumeEcShardsRebuildRequest
-	57,  // 47: volume_server_pb.VolumeServer.VolumeEcShardsCopy:input_type -> volume_server_pb.VolumeEcShardsCopyRequest
-	59,  // 48: volume_server_pb.VolumeServer.VolumeEcShardsDelete:input_type -> volume_server_pb.VolumeEcShardsDeleteRequest
-	61,  // 49: volume_server_pb.VolumeServer.VolumeEcShardsMount:input_type -> volume_server_pb.VolumeEcShardsMountRequest
-	63,  // 50: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:input_type -> volume_server_pb.VolumeEcShardsUnmountRequest
-	65,  // 51: volume_server_pb.VolumeServer.VolumeEcShardRead:input_type -> volume_server_pb.VolumeEcShardReadRequest
-	67,  // 52: volume_server_pb.VolumeServer.VolumeEcBlobDelete:input_type -> volume_server_pb.VolumeEcBlobDeleteRequest
-	69,  // 53: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:input_type -> volume_server_pb.VolumeEcShardsToVolumeRequest
-	71,  // 54: volume_server_pb.VolumeServer.VolumeEcShardsInfo:input_type -> volume_server_pb.VolumeEcShardsInfoRequest
-	81,  // 55: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:input_type -> volume_server_pb.VolumeTierMoveDatToRemoteRequest
-	83,  // 56: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:input_type -> volume_server_pb.VolumeTierMoveDatFromRemoteRequest
-	85,  // 57: volume_server_pb.VolumeServer.VolumeServerStatus:input_type -> volume_server_pb.VolumeServerStatusRequest
-	87,  // 58: volume_server_pb.VolumeServer.VolumeServerLeave:input_type -> volume_server_pb.VolumeServerLeaveRequest
-	89,  // 59: volume_server_pb.VolumeServer.FetchAndWriteNeedle:input_type -> volume_server_pb.FetchAndWriteNeedleRequest
-	91,  // 60: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
-	93,  // 61: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
-	95,  // 62: volume_server_pb.VolumeServer.Ping:input_type -> volume_server_pb.PingRequest
-	1,   // 63: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
-	5,   // 64: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
-	7,   // 65: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
-	9,   // 66: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
-	11,  // 67: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
-	13,  // 68: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
-	15,  // 69: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
-	17,  // 70: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
-	19,  // 71: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
-	21,  // 72: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
-	23,  // 73: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
-	25,  // 74: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
-	27,  // 75: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
-	29,  // 76: volume_server_pb.VolumeServer.VolumeMarkWritable:output_type -> volume_server_pb.VolumeMarkWritableResponse
-	31,  // 77: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
-	33,  // 78: volume_server_pb.VolumeServer.VolumeStatus:output_type -> volume_server_pb.VolumeStatusResponse
-	35,  // 79: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
-	75,  // 80: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
-	37,  // 81: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
-	40,  // 82: volume_server_pb.VolumeServer.ReceiveFile:output_type -> volume_server_pb.ReceiveFileResponse
-	42,  // 83: volume_server_pb.VolumeServer.ReadNeedleBlob:output_type -> volume_server_pb.ReadNeedleBlobResponse
-	44,  // 84: volume_server_pb.VolumeServer.ReadNeedleMeta:output_type -> volume_server_pb.ReadNeedleMetaResponse
-	46,  // 85: volume_server_pb.VolumeServer.WriteNeedleBlob:output_type -> volume_server_pb.WriteNeedleBlobResponse
-	48,  // 86: volume_server_pb.VolumeServer.ReadAllNeedles:output_type -> volume_server_pb.ReadAllNeedlesResponse
-	50,  // 87: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
-	52,  // 88: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
-	54,  // 89: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
-	56,  // 90: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
-	58,  // 91: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
-	60,  // 92: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
-	62,  // 93: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
-	64,  // 94: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
-	66,  // 95: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
-	68,  // 96: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
-	70,  // 97: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
-	72,  // 98: volume_server_pb.VolumeServer.VolumeEcShardsInfo:output_type -> volume_server_pb.VolumeEcShardsInfoResponse
-	82,  // 99: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
-	84,  // 100: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
-	86,  // 101: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
-	88,  // 102: volume_server_pb.VolumeServer.VolumeServerLeave:output_type -> volume_server_pb.VolumeServerLeaveResponse
-	90,  // 103: volume_server_pb.VolumeServer.FetchAndWriteNeedle:output_type -> volume_server_pb.FetchAndWriteNeedleResponse
-	92,  // 104: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
-	94,  // 105: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
-	96,  // 106: volume_server_pb.VolumeServer.Ping:output_type -> volume_server_pb.PingResponse
-	63,  // [63:107] is the sub-list for method output_type
-	19,  // [19:63] is the sub-list for method input_type
-	19,  // [19:19] is the sub-list for extension type_name
-	19,  // [19:19] is the sub-list for extension extendee
-	0,   // [0:19] is the sub-list for field type_name
+	80,  // 5: volume_server_pb.VolumeInfo.ec_shard_config:type_name -> volume_server_pb.EcShardConfig
+	78,  // 6: volume_server_pb.OldVersionVolumeInfo.files:type_name -> volume_server_pb.RemoteFile
+	76,  // 7: volume_server_pb.VolumeServerStatusResponse.disk_statuses:type_name -> volume_server_pb.DiskStatus
+	77,  // 8: volume_server_pb.VolumeServerStatusResponse.memory_status:type_name -> volume_server_pb.MemStatus
+	98,  // 9: volume_server_pb.FetchAndWriteNeedleRequest.replicas:type_name -> volume_server_pb.FetchAndWriteNeedleRequest.Replica
+	107, // 10: volume_server_pb.FetchAndWriteNeedleRequest.remote_conf:type_name -> remote_pb.RemoteConf
+	108, // 11: volume_server_pb.FetchAndWriteNeedleRequest.remote_location:type_name -> remote_pb.RemoteStorageLocation
+	99,  // 12: volume_server_pb.QueryRequest.filter:type_name -> volume_server_pb.QueryRequest.Filter
+	100, // 13: volume_server_pb.QueryRequest.input_serialization:type_name -> volume_server_pb.QueryRequest.InputSerialization
+	101, // 14: volume_server_pb.QueryRequest.output_serialization:type_name -> volume_server_pb.QueryRequest.OutputSerialization
+	102, // 15: volume_server_pb.QueryRequest.InputSerialization.csv_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.CSVInput
+	103, // 16: volume_server_pb.QueryRequest.InputSerialization.json_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.JSONInput
+	104, // 17: volume_server_pb.QueryRequest.InputSerialization.parquet_input:type_name -> volume_server_pb.QueryRequest.InputSerialization.ParquetInput
+	105, // 18: volume_server_pb.QueryRequest.OutputSerialization.csv_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.CSVOutput
+	106, // 19: volume_server_pb.QueryRequest.OutputSerialization.json_output:type_name -> volume_server_pb.QueryRequest.OutputSerialization.JSONOutput
+	0,   // 20: volume_server_pb.VolumeServer.BatchDelete:input_type -> volume_server_pb.BatchDeleteRequest
+	4,   // 21: volume_server_pb.VolumeServer.VacuumVolumeCheck:input_type -> volume_server_pb.VacuumVolumeCheckRequest
+	6,   // 22: volume_server_pb.VolumeServer.VacuumVolumeCompact:input_type -> volume_server_pb.VacuumVolumeCompactRequest
+	8,   // 23: volume_server_pb.VolumeServer.VacuumVolumeCommit:input_type -> volume_server_pb.VacuumVolumeCommitRequest
+	10,  // 24: volume_server_pb.VolumeServer.VacuumVolumeCleanup:input_type -> volume_server_pb.VacuumVolumeCleanupRequest
+	12,  // 25: volume_server_pb.VolumeServer.DeleteCollection:input_type -> volume_server_pb.DeleteCollectionRequest
+	14,  // 26: volume_server_pb.VolumeServer.AllocateVolume:input_type -> volume_server_pb.AllocateVolumeRequest
+	16,  // 27: volume_server_pb.VolumeServer.VolumeSyncStatus:input_type -> volume_server_pb.VolumeSyncStatusRequest
+	18,  // 28: volume_server_pb.VolumeServer.VolumeIncrementalCopy:input_type -> volume_server_pb.VolumeIncrementalCopyRequest
+	20,  // 29: volume_server_pb.VolumeServer.VolumeMount:input_type -> volume_server_pb.VolumeMountRequest
+	22,  // 30: volume_server_pb.VolumeServer.VolumeUnmount:input_type -> volume_server_pb.VolumeUnmountRequest
+	24,  // 31: volume_server_pb.VolumeServer.VolumeDelete:input_type -> volume_server_pb.VolumeDeleteRequest
+	26,  // 32: volume_server_pb.VolumeServer.VolumeMarkReadonly:input_type -> volume_server_pb.VolumeMarkReadonlyRequest
+	28,  // 33: volume_server_pb.VolumeServer.VolumeMarkWritable:input_type -> volume_server_pb.VolumeMarkWritableRequest
+	30,  // 34: volume_server_pb.VolumeServer.VolumeConfigure:input_type -> volume_server_pb.VolumeConfigureRequest
+	32,  // 35: volume_server_pb.VolumeServer.VolumeStatus:input_type -> volume_server_pb.VolumeStatusRequest
+	34,  // 36: volume_server_pb.VolumeServer.VolumeCopy:input_type -> volume_server_pb.VolumeCopyRequest
+	74,  // 37: volume_server_pb.VolumeServer.ReadVolumeFileStatus:input_type -> volume_server_pb.ReadVolumeFileStatusRequest
+	36,  // 38: volume_server_pb.VolumeServer.CopyFile:input_type -> volume_server_pb.CopyFileRequest
+	38,  // 39: volume_server_pb.VolumeServer.ReceiveFile:input_type -> volume_server_pb.ReceiveFileRequest
+	41,  // 40: volume_server_pb.VolumeServer.ReadNeedleBlob:input_type -> volume_server_pb.ReadNeedleBlobRequest
+	43,  // 41: volume_server_pb.VolumeServer.ReadNeedleMeta:input_type -> volume_server_pb.ReadNeedleMetaRequest
+	45,  // 42: volume_server_pb.VolumeServer.WriteNeedleBlob:input_type -> volume_server_pb.WriteNeedleBlobRequest
+	47,  // 43: volume_server_pb.VolumeServer.ReadAllNeedles:input_type -> volume_server_pb.ReadAllNeedlesRequest
+	49,  // 44: volume_server_pb.VolumeServer.VolumeTailSender:input_type -> volume_server_pb.VolumeTailSenderRequest
+	51,  // 45: volume_server_pb.VolumeServer.VolumeTailReceiver:input_type -> volume_server_pb.VolumeTailReceiverRequest
+	53,  // 46: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:input_type -> volume_server_pb.VolumeEcShardsGenerateRequest
+	55,  // 47: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:input_type -> volume_server_pb.VolumeEcShardsRebuildRequest
+	57,  // 48: volume_server_pb.VolumeServer.VolumeEcShardsCopy:input_type -> volume_server_pb.VolumeEcShardsCopyRequest
+	59,  // 49: volume_server_pb.VolumeServer.VolumeEcShardsDelete:input_type -> volume_server_pb.VolumeEcShardsDeleteRequest
+	61,  // 50: volume_server_pb.VolumeServer.VolumeEcShardsMount:input_type -> volume_server_pb.VolumeEcShardsMountRequest
+	63,  // 51: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:input_type -> volume_server_pb.VolumeEcShardsUnmountRequest
+	65,  // 52: volume_server_pb.VolumeServer.VolumeEcShardRead:input_type -> volume_server_pb.VolumeEcShardReadRequest
+	67,  // 53: volume_server_pb.VolumeServer.VolumeEcBlobDelete:input_type -> volume_server_pb.VolumeEcBlobDeleteRequest
+	69,  // 54: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:input_type -> volume_server_pb.VolumeEcShardsToVolumeRequest
+	71,  // 55: volume_server_pb.VolumeServer.VolumeEcShardsInfo:input_type -> volume_server_pb.VolumeEcShardsInfoRequest
+	82,  // 56: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:input_type -> volume_server_pb.VolumeTierMoveDatToRemoteRequest
+	84,  // 57: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:input_type -> volume_server_pb.VolumeTierMoveDatFromRemoteRequest
+	86,  // 58: volume_server_pb.VolumeServer.VolumeServerStatus:input_type -> volume_server_pb.VolumeServerStatusRequest
+	88,  // 59: volume_server_pb.VolumeServer.VolumeServerLeave:input_type -> volume_server_pb.VolumeServerLeaveRequest
+	90,  // 60: volume_server_pb.VolumeServer.FetchAndWriteNeedle:input_type -> volume_server_pb.FetchAndWriteNeedleRequest
+	92,  // 61: volume_server_pb.VolumeServer.Query:input_type -> volume_server_pb.QueryRequest
+	94,  // 62: volume_server_pb.VolumeServer.VolumeNeedleStatus:input_type -> volume_server_pb.VolumeNeedleStatusRequest
+	96,  // 63: volume_server_pb.VolumeServer.Ping:input_type -> volume_server_pb.PingRequest
+	1,   // 64: volume_server_pb.VolumeServer.BatchDelete:output_type -> volume_server_pb.BatchDeleteResponse
+	5,   // 65: volume_server_pb.VolumeServer.VacuumVolumeCheck:output_type -> volume_server_pb.VacuumVolumeCheckResponse
+	7,   // 66: volume_server_pb.VolumeServer.VacuumVolumeCompact:output_type -> volume_server_pb.VacuumVolumeCompactResponse
+	9,   // 67: volume_server_pb.VolumeServer.VacuumVolumeCommit:output_type -> volume_server_pb.VacuumVolumeCommitResponse
+	11,  // 68: volume_server_pb.VolumeServer.VacuumVolumeCleanup:output_type -> volume_server_pb.VacuumVolumeCleanupResponse
+	13,  // 69: volume_server_pb.VolumeServer.DeleteCollection:output_type -> volume_server_pb.DeleteCollectionResponse
+	15,  // 70: volume_server_pb.VolumeServer.AllocateVolume:output_type -> volume_server_pb.AllocateVolumeResponse
+	17,  // 71: volume_server_pb.VolumeServer.VolumeSyncStatus:output_type -> volume_server_pb.VolumeSyncStatusResponse
+	19,  // 72: volume_server_pb.VolumeServer.VolumeIncrementalCopy:output_type -> volume_server_pb.VolumeIncrementalCopyResponse
+	21,  // 73: volume_server_pb.VolumeServer.VolumeMount:output_type -> volume_server_pb.VolumeMountResponse
+	23,  // 74: volume_server_pb.VolumeServer.VolumeUnmount:output_type -> volume_server_pb.VolumeUnmountResponse
+	25,  // 75: volume_server_pb.VolumeServer.VolumeDelete:output_type -> volume_server_pb.VolumeDeleteResponse
+	27,  // 76: volume_server_pb.VolumeServer.VolumeMarkReadonly:output_type -> volume_server_pb.VolumeMarkReadonlyResponse
+	29,  // 77: volume_server_pb.VolumeServer.VolumeMarkWritable:output_type -> volume_server_pb.VolumeMarkWritableResponse
+	31,  // 78: volume_server_pb.VolumeServer.VolumeConfigure:output_type -> volume_server_pb.VolumeConfigureResponse
+	33,  // 79: volume_server_pb.VolumeServer.VolumeStatus:output_type -> volume_server_pb.VolumeStatusResponse
+	35,  // 80: volume_server_pb.VolumeServer.VolumeCopy:output_type -> volume_server_pb.VolumeCopyResponse
+	75,  // 81: volume_server_pb.VolumeServer.ReadVolumeFileStatus:output_type -> volume_server_pb.ReadVolumeFileStatusResponse
+	37,  // 82: volume_server_pb.VolumeServer.CopyFile:output_type -> volume_server_pb.CopyFileResponse
+	40,  // 83: volume_server_pb.VolumeServer.ReceiveFile:output_type -> volume_server_pb.ReceiveFileResponse
+	42,  // 84: volume_server_pb.VolumeServer.ReadNeedleBlob:output_type -> volume_server_pb.ReadNeedleBlobResponse
+	44,  // 85: volume_server_pb.VolumeServer.ReadNeedleMeta:output_type -> volume_server_pb.ReadNeedleMetaResponse
+	46,  // 86: volume_server_pb.VolumeServer.WriteNeedleBlob:output_type -> volume_server_pb.WriteNeedleBlobResponse
+	48,  // 87: volume_server_pb.VolumeServer.ReadAllNeedles:output_type -> volume_server_pb.ReadAllNeedlesResponse
+	50,  // 88: volume_server_pb.VolumeServer.VolumeTailSender:output_type -> volume_server_pb.VolumeTailSenderResponse
+	52,  // 89: volume_server_pb.VolumeServer.VolumeTailReceiver:output_type -> volume_server_pb.VolumeTailReceiverResponse
+	54,  // 90: volume_server_pb.VolumeServer.VolumeEcShardsGenerate:output_type -> volume_server_pb.VolumeEcShardsGenerateResponse
+	56,  // 91: volume_server_pb.VolumeServer.VolumeEcShardsRebuild:output_type -> volume_server_pb.VolumeEcShardsRebuildResponse
+	58,  // 92: volume_server_pb.VolumeServer.VolumeEcShardsCopy:output_type -> volume_server_pb.VolumeEcShardsCopyResponse
+	60,  // 93: volume_server_pb.VolumeServer.VolumeEcShardsDelete:output_type -> volume_server_pb.VolumeEcShardsDeleteResponse
+	62,  // 94: volume_server_pb.VolumeServer.VolumeEcShardsMount:output_type -> volume_server_pb.VolumeEcShardsMountResponse
+	64,  // 95: volume_server_pb.VolumeServer.VolumeEcShardsUnmount:output_type -> volume_server_pb.VolumeEcShardsUnmountResponse
+	66,  // 96: volume_server_pb.VolumeServer.VolumeEcShardRead:output_type -> volume_server_pb.VolumeEcShardReadResponse
+	68,  // 97: volume_server_pb.VolumeServer.VolumeEcBlobDelete:output_type -> volume_server_pb.VolumeEcBlobDeleteResponse
+	70,  // 98: volume_server_pb.VolumeServer.VolumeEcShardsToVolume:output_type -> volume_server_pb.VolumeEcShardsToVolumeResponse
+	72,  // 99: volume_server_pb.VolumeServer.VolumeEcShardsInfo:output_type -> volume_server_pb.VolumeEcShardsInfoResponse
+	83,  // 100: volume_server_pb.VolumeServer.VolumeTierMoveDatToRemote:output_type -> volume_server_pb.VolumeTierMoveDatToRemoteResponse
+	85,  // 101: volume_server_pb.VolumeServer.VolumeTierMoveDatFromRemote:output_type -> volume_server_pb.VolumeTierMoveDatFromRemoteResponse
+	87,  // 102: volume_server_pb.VolumeServer.VolumeServerStatus:output_type -> volume_server_pb.VolumeServerStatusResponse
+	89,  // 103: volume_server_pb.VolumeServer.VolumeServerLeave:output_type -> volume_server_pb.VolumeServerLeaveResponse
+	91,  // 104: volume_server_pb.VolumeServer.FetchAndWriteNeedle:output_type -> volume_server_pb.FetchAndWriteNeedleResponse
+	93,  // 105: volume_server_pb.VolumeServer.Query:output_type -> volume_server_pb.QueriedStripe
+	95,  // 106: volume_server_pb.VolumeServer.VolumeNeedleStatus:output_type -> volume_server_pb.VolumeNeedleStatusResponse
+	97,  // 107: volume_server_pb.VolumeServer.Ping:output_type -> volume_server_pb.PingResponse
+	64,  // [64:108] is the sub-list for method output_type
+	20,  // [20:64] is the sub-list for method input_type
+	20,  // [20:20] is the sub-list for extension type_name
+	20,  // [20:20] is the sub-list for extension extendee
+	0,   // [0:20] is the sub-list for field type_name
 }
 
 func init() { file_volume_server_proto_init() }
@@ -6852,7 +6920,7 @@ func file_volume_server_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_volume_server_proto_rawDesc), len(file_volume_server_proto_rawDesc)),
 			NumEnums:      0,
-			NumMessages:   106,
+			NumMessages:   107,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/weed/server/volume_grpc_erasure_coding.go b/weed/server/volume_grpc_erasure_coding.go
index 88e94115d..5d100bdda 100644
--- a/weed/server/volume_grpc_erasure_coding.go
+++ b/weed/server/volume_grpc_erasure_coding.go
@@ -50,20 +50,38 @@ func (vs *VolumeServer) VolumeEcShardsGenerate(ctx context.Context, req *volume_
 		return nil, fmt.Errorf("existing collection:%v unexpected input: %v", v.Collection, req.Collection)
 	}
 
+	// Create EC context - prefer existing .vif config if present (for regeneration scenarios)
+	ecCtx := erasure_coding.NewDefaultECContext(req.Collection, needle.VolumeId(req.VolumeId))
+	if volumeInfo, _, found, _ := volume_info.MaybeLoadVolumeInfo(baseFileName + ".vif"); found && volumeInfo.EcShardConfig != nil {
+		ds := int(volumeInfo.EcShardConfig.DataShards)
+		ps := int(volumeInfo.EcShardConfig.ParityShards)
+
+		// Validate and use existing EC config
+		if ds > 0 && ps > 0 && ds+ps <= erasure_coding.MaxShardCount {
+			ecCtx.DataShards = ds
+			ecCtx.ParityShards = ps
+			glog.V(0).Infof("Using existing EC config for volume %d: %s", req.VolumeId, ecCtx.String())
+		} else {
+			glog.Warningf("Invalid EC config in .vif for volume %d (data=%d, parity=%d), using defaults", req.VolumeId, ds, ps)
+		}
+	} else {
+		glog.V(0).Infof("Using default EC config for volume %d: %s", req.VolumeId, ecCtx.String())
+	}
+
 	shouldCleanup := true
 	defer func() {
 		if !shouldCleanup {
 			return
 		}
-		for i := 0; i < erasure_coding.TotalShardsCount; i++ {
-			os.Remove(fmt.Sprintf("%s.ec%2d", baseFileName, i))
+		for i := 0; i < ecCtx.Total(); i++ {
+			os.Remove(baseFileName + ecCtx.ToExt(i))
 		}
 		os.Remove(v.IndexFileName() + ".ecx")
 	}()
 
-	// write .ec00 ~ .ec13 files
-	if err := erasure_coding.WriteEcFiles(baseFileName); err != nil {
-		return nil, fmt.Errorf("WriteEcFiles %s: %v", baseFileName, err)
+	// write .ec00 ~ .ec[TotalShards-1] files using context
+	if err := erasure_coding.WriteEcFilesWithContext(baseFileName, ecCtx); err != nil {
+		return nil, fmt.Errorf("WriteEcFilesWithContext %s: %v", baseFileName, err)
 	}
 
 	// write .ecx file
@@ -84,6 +102,21 @@ func (vs *VolumeServer) VolumeEcShardsGenerate(ctx context.Context, req *volume_
 
 	datSize, _, _ := v.FileStat()
 	volumeInfo.DatFileSize = int64(datSize)
+
+	// Validate EC configuration before saving to .vif
+	if ecCtx.DataShards <= 0 || ecCtx.ParityShards <= 0 || ecCtx.Total() > erasure_coding.MaxShardCount {
+		return nil, fmt.Errorf("invalid EC config before saving: data=%d, parity=%d, total=%d (max=%d)",
+			ecCtx.DataShards, ecCtx.ParityShards, ecCtx.Total(), erasure_coding.MaxShardCount)
+	}
+
+	// Save EC configuration to VolumeInfo
+	volumeInfo.EcShardConfig = &volume_server_pb.EcShardConfig{
+		DataShards:   uint32(ecCtx.DataShards),
+		ParityShards: uint32(ecCtx.ParityShards),
+	}
+	glog.V(1).Infof("Saving EC config to .vif for volume %d: %d+%d (total: %d)",
+		req.VolumeId, ecCtx.DataShards, ecCtx.ParityShards, ecCtx.Total())
+
 	if err := volume_info.SaveVolumeInfo(baseFileName+".vif", volumeInfo); err != nil {
 		return nil, fmt.Errorf("SaveVolumeInfo %s: %v", baseFileName, err)
 	}
@@ -442,9 +475,10 @@ func (vs *VolumeServer) VolumeEcShardsToVolume(ctx context.Context, req *volume_
 
 	glog.V(0).Infof("VolumeEcShardsToVolume: %v", req)
 
-	// collect .ec00 ~ .ec09 files
-	shardFileNames := make([]string, erasure_coding.DataShardsCount)
-	v, found := vs.store.CollectEcShards(needle.VolumeId(req.VolumeId), shardFileNames)
+	// Collect all EC shards (NewEcVolume will load EC config from .vif into v.ECContext)
+	// Use MaxShardCount (32) to support custom EC ratios up to 32 total shards
+	tempShards := make([]string, erasure_coding.MaxShardCount)
+	v, found := vs.store.CollectEcShards(needle.VolumeId(req.VolumeId), tempShards)
 	if !found {
 		return nil, fmt.Errorf("ec volume %d not found", req.VolumeId)
 	}
@@ -453,7 +487,19 @@ func (vs *VolumeServer) VolumeEcShardsToVolume(ctx context.Context, req *volume_
 		return nil, fmt.Errorf("existing collection:%v unexpected input: %v", v.Collection, req.Collection)
 	}
 
-	for shardId := 0; shardId < erasure_coding.DataShardsCount; shardId++ {
+	// Use EC context (already loaded from .vif) to determine data shard count
+	dataShards := v.ECContext.DataShards
+
+	// Defensive validation to prevent panics from corrupted ECContext
+	if dataShards <= 0 || dataShards > erasure_coding.MaxShardCount {
+		return nil, fmt.Errorf("invalid data shard count %d for volume %d (must be 1..%d)", dataShards, req.VolumeId, erasure_coding.MaxShardCount)
+	}
+
+	shardFileNames := tempShards[:dataShards]
+	glog.V(1).Infof("Using EC config from volume %d: %d data shards", req.VolumeId, dataShards)
+
+	// Verify all data shards are present
+	for shardId := 0; shardId < dataShards; shardId++ {
 		if shardFileNames[shardId] == "" {
 			return nil, fmt.Errorf("ec volume %d missing shard %d", req.VolumeId, shardId)
 		}
diff --git a/weed/shell/command_ec_common.go b/weed/shell/command_ec_common.go
index 665daa1b8..f059b4e74 100644
--- a/weed/shell/command_ec_common.go
+++ b/weed/shell/command_ec_common.go
@@ -622,7 +622,8 @@ func (ecb *ecBalancer) deleteDuplicatedEcShards(collection string) error {
 
 func (ecb *ecBalancer) doDeduplicateEcShards(collection string, vid needle.VolumeId, locations []*EcNode) error {
 	// check whether this volume has ecNodes that are over average
-	shardToLocations := make([][]*EcNode, erasure_coding.TotalShardsCount)
+	// Use MaxShardCount (32) to support custom EC ratios
+	shardToLocations := make([][]*EcNode, erasure_coding.MaxShardCount)
 	for _, ecNode := range locations {
 		shardBits := findEcVolumeShards(ecNode, vid)
 		for _, shardId := range shardBits.ShardIds() {
@@ -677,11 +678,16 @@ func countShardsByRack(vid needle.VolumeId, locations []*EcNode) map[string]int
 func (ecb *ecBalancer) doBalanceEcShardsAcrossRacks(collection string, vid needle.VolumeId, locations []*EcNode) error {
 	racks := ecb.racks()
 
-	// calculate average number of shards an ec rack should have for one volume
-	averageShardsPerEcRack := ceilDivide(erasure_coding.TotalShardsCount, len(racks))
-
 	// see the volume's shards are in how many racks, and how many in each rack
 	rackToShardCount := countShardsByRack(vid, locations)
+
+	// Calculate actual total shards for this volume (not hardcoded default)
+	var totalShardsForVolume int
+	for _, count := range rackToShardCount {
+		totalShardsForVolume += count
+	}
+	// calculate average number of shards an ec rack should have for one volume
+	averageShardsPerEcRack := ceilDivide(totalShardsForVolume, len(racks))
 	rackEcNodesWithVid := groupBy(locations, func(ecNode *EcNode) string {
 		return string(ecNode.rack)
 	})
diff --git a/weed/shell/command_ec_rebuild.go b/weed/shell/command_ec_rebuild.go
index 8cae77434..cceaa1899 100644
--- a/weed/shell/command_ec_rebuild.go
+++ b/weed/shell/command_ec_rebuild.go
@@ -264,7 +264,8 @@ func (ecShardMap EcShardMap) registerEcNode(ecNode *EcNode, collection string) {
 			if shardInfo.Collection == collection {
 				existing, found := ecShardMap[needle.VolumeId(shardInfo.Id)]
 				if !found {
-					existing = make([][]*EcNode, erasure_coding.TotalShardsCount)
+					// Use MaxShardCount (32) to support custom EC ratios
+					existing = make([][]*EcNode, erasure_coding.MaxShardCount)
 					ecShardMap[needle.VolumeId(shardInfo.Id)] = existing
 				}
 				for _, shardId := range erasure_coding.ShardBits(shardInfo.EcIndexBits).ShardIds() {
diff --git a/weed/storage/disk_location_ec.go b/weed/storage/disk_location_ec.go
index 128bfd26f..b370555da 100644
--- a/weed/storage/disk_location_ec.go
+++ b/weed/storage/disk_location_ec.go
@@ -16,7 +16,9 @@ import (
 )
 
 var (
-	re = regexp.MustCompile(`\.ec[0-9][0-9]`)
+	// Match .ec00 through .ec999 (currently only .ec00-.ec31 are used)
+	// Using \d{2,3} for future-proofing if MaxShardCount is ever increased beyond 99
+	re = regexp.MustCompile(`\.ec\d{2,3}`)
 )
 
 func (l *DiskLocation) FindEcVolume(vid needle.VolumeId) (*erasure_coding.EcVolume, bool) {
@@ -398,8 +400,8 @@ func (l *DiskLocation) validateEcVolume(collection string, vid needle.VolumeId)
 	var actualShardSize int64 = -1
 
 	// Count shards and validate they all have the same size (required for Reed-Solomon EC)
-	// Shard files (.ec00 - .ec13) are always in l.Directory, not l.IdxDirectory
-	for i := 0; i < erasure_coding.TotalShardsCount; i++ {
+	// Check up to MaxShardCount (32) to support custom EC ratios
+	for i := 0; i < erasure_coding.MaxShardCount; i++ {
 		shardFileName := baseFileName + erasure_coding.ToExt(i)
 		fi, err := os.Stat(shardFileName)
 
@@ -472,8 +474,9 @@ func (l *DiskLocation) removeEcVolumeFiles(collection string, vid needle.VolumeI
 	removeFile(indexBaseFileName+".ecx", "EC index file")
 	removeFile(indexBaseFileName+".ecj", "EC journal file")
 
-	// Remove all EC shard files (.ec00 ~ .ec13) from data directory
-	for i := 0; i < erasure_coding.TotalShardsCount; i++ {
+	// Remove all EC shard files (.ec00 ~ .ec31) from data directory
+	// Use MaxShardCount (32) to support custom EC ratios
+	for i := 0; i < erasure_coding.MaxShardCount; i++ {
 		removeFile(baseFileName+erasure_coding.ToExt(i), "EC shard file")
 	}
 }
diff --git a/weed/storage/erasure_coding/ec_context.go b/weed/storage/erasure_coding/ec_context.go
new file mode 100644
index 000000000..770fe41af
--- /dev/null
+++ b/weed/storage/erasure_coding/ec_context.go
@@ -0,0 +1,46 @@
+package erasure_coding
+
+import (
+	"fmt"
+
+	"github.com/klauspost/reedsolomon"
+	"github.com/seaweedfs/seaweedfs/weed/storage/needle"
+)
+
+// ECContext encapsulates erasure coding parameters for encoding/decoding operations
+type ECContext struct {
+	DataShards   int
+	ParityShards int
+	Collection   string
+	VolumeId     needle.VolumeId
+}
+
+// Total returns the total number of shards (data + parity)
+func (ctx *ECContext) Total() int {
+	return ctx.DataShards + ctx.ParityShards
+}
+
+// NewDefaultECContext creates a context with default 10+4 shard configuration
+func NewDefaultECContext(collection string, volumeId needle.VolumeId) *ECContext {
+	return &ECContext{
+		DataShards:   DataShardsCount,
+		ParityShards: ParityShardsCount,
+		Collection:   collection,
+		VolumeId:     volumeId,
+	}
+}
+
+// CreateEncoder creates a Reed-Solomon encoder for this context
+func (ctx *ECContext) CreateEncoder() (reedsolomon.Encoder, error) {
+	return reedsolomon.New(ctx.DataShards, ctx.ParityShards)
+}
+
+// ToExt returns the file extension for a given shard index
+func (ctx *ECContext) ToExt(shardIndex int) string {
+	return fmt.Sprintf(".ec%02d", shardIndex)
+}
+
+// String returns a human-readable representation of the EC configuration
+func (ctx *ECContext) String() string {
+	return fmt.Sprintf("%d+%d (total: %d)", ctx.DataShards, ctx.ParityShards, ctx.Total())
+}
diff --git a/weed/storage/erasure_coding/ec_encoder.go b/weed/storage/erasure_coding/ec_encoder.go
index eeeb156e6..81ebffdcb 100644
--- a/weed/storage/erasure_coding/ec_encoder.go
+++ b/weed/storage/erasure_coding/ec_encoder.go
@@ -11,6 +11,7 @@ import (
 	"github.com/seaweedfs/seaweedfs/weed/storage/idx"
 	"github.com/seaweedfs/seaweedfs/weed/storage/needle_map"
 	"github.com/seaweedfs/seaweedfs/weed/storage/types"
+	"github.com/seaweedfs/seaweedfs/weed/storage/volume_info"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 )
 
@@ -18,6 +19,7 @@ const (
 	DataShardsCount             = 10
 	ParityShardsCount           = 4
 	TotalShardsCount            = DataShardsCount + ParityShardsCount
+	MaxShardCount               = 32 // Maximum number of shards since ShardBits is uint32 (bits 0-31)
 	MinTotalDisks               = TotalShardsCount/ParityShardsCount + 1
 	ErasureCodingLargeBlockSize = 1024 * 1024 * 1024 // 1GB
 	ErasureCodingSmallBlockSize = 1024 * 1024        // 1MB
@@ -54,20 +56,53 @@ func WriteSortedFileFromIdx(baseFileName string, ext string) (e error) {
 	return nil
 }
 
-// WriteEcFiles generates .ec00 ~ .ec13 files
+// WriteEcFiles generates .ec00 ~ .ec13 files using default EC context
 func WriteEcFiles(baseFileName string) error {
-	return generateEcFiles(baseFileName, 256*1024, ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize)
+	ctx := NewDefaultECContext("", 0)
+	return WriteEcFilesWithContext(baseFileName, ctx)
+}
+
+// WriteEcFilesWithContext generates EC files using the provided context
+func WriteEcFilesWithContext(baseFileName string, ctx *ECContext) error {
+	return generateEcFiles(baseFileName, 256*1024, ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, ctx)
 }
 
 func RebuildEcFiles(baseFileName string) ([]uint32, error) {
-	return generateMissingEcFiles(baseFileName, 256*1024, ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize)
+	// Attempt to load EC config from .vif file to preserve original configuration
+	var ctx *ECContext
+	if volumeInfo, _, found, _ := volume_info.MaybeLoadVolumeInfo(baseFileName + ".vif"); found && volumeInfo.EcShardConfig != nil {
+		ds := int(volumeInfo.EcShardConfig.DataShards)
+		ps := int(volumeInfo.EcShardConfig.ParityShards)
+
+		// Validate EC config before using it
+		if ds > 0 && ps > 0 && ds+ps <= MaxShardCount {
+			ctx = &ECContext{
+				DataShards:   ds,
+				ParityShards: ps,
+			}
+			glog.V(0).Infof("Rebuilding EC files for %s with config from .vif: %s", baseFileName, ctx.String())
+		} else {
+			glog.Warningf("Invalid EC config in .vif for %s (data=%d, parity=%d), using default", baseFileName, ds, ps)
+			ctx = NewDefaultECContext("", 0)
+		}
+	} else {
+		glog.V(0).Infof("Rebuilding EC files for %s with default config", baseFileName)
+		ctx = NewDefaultECContext("", 0)
+	}
+
+	return RebuildEcFilesWithContext(baseFileName, ctx)
+}
+
+// RebuildEcFilesWithContext rebuilds missing EC files using the provided context
+func RebuildEcFilesWithContext(baseFileName string, ctx *ECContext) ([]uint32, error) {
+	return generateMissingEcFiles(baseFileName, 256*1024, ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, ctx)
 }
 
 func ToExt(ecIndex int) string {
 	return fmt.Sprintf(".ec%02d", ecIndex)
 }
 
-func generateEcFiles(baseFileName string, bufferSize int, largeBlockSize int64, smallBlockSize int64) error {
+func generateEcFiles(baseFileName string, bufferSize int, largeBlockSize int64, smallBlockSize int64, ctx *ECContext) error {
 	file, err := os.OpenFile(baseFileName+".dat", os.O_RDONLY, 0)
 	if err != nil {
 		return fmt.Errorf("failed to open dat file: %w", err)
@@ -79,21 +114,21 @@ func generateEcFiles(baseFileName string, bufferSize int, largeBlockSize int64,
 		return fmt.Errorf("failed to stat dat file: %w", err)
 	}
 
-	glog.V(0).Infof("encodeDatFile %s.dat size:%d", baseFileName, fi.Size())
-	err = encodeDatFile(fi.Size(), baseFileName, bufferSize, largeBlockSize, file, smallBlockSize)
+	glog.V(0).Infof("encodeDatFile %s.dat size:%d with EC context %s", baseFileName, fi.Size(), ctx.String())
+	err = encodeDatFile(fi.Size(), baseFileName, bufferSize, largeBlockSize, file, smallBlockSize, ctx)
 	if err != nil {
 		return fmt.Errorf("encodeDatFile: %w", err)
 	}
 	return nil
 }
 
-func generateMissingEcFiles(baseFileName string, bufferSize int, largeBlockSize int64, smallBlockSize int64) (generatedShardIds []uint32, err error) {
+func generateMissingEcFiles(baseFileName string, bufferSize int, largeBlockSize int64, smallBlockSize int64, ctx *ECContext) (generatedShardIds []uint32, err error) {
 
-	shardHasData := make([]bool, TotalShardsCount)
-	inputFiles := make([]*os.File, TotalShardsCount)
-	outputFiles := make([]*os.File, TotalShardsCount)
-	for shardId := 0; shardId < TotalShardsCount; shardId++ {
-		shardFileName := baseFileName + ToExt(shardId)
+	shardHasData := make([]bool, ctx.Total())
+	inputFiles := make([]*os.File, ctx.Total())
+	outputFiles := make([]*os.File, ctx.Total())
+	for shardId := 0; shardId < ctx.Total(); shardId++ {
+		shardFileName := baseFileName + ctx.ToExt(shardId)
 		if util.FileExists(shardFileName) {
 			shardHasData[shardId] = true
 			inputFiles[shardId], err = os.OpenFile(shardFileName, os.O_RDONLY, 0)
@@ -111,14 +146,14 @@ func generateMissingEcFiles(baseFileName string, bufferSize int, largeBlockSize
 		}
 	}
 
-	err = rebuildEcFiles(shardHasData, inputFiles, outputFiles)
+	err = rebuildEcFiles(shardHasData, inputFiles, outputFiles, ctx)
 	if err != nil {
 		return nil, fmt.Errorf("rebuildEcFiles: %w", err)
 	}
 	return
 }
 
-func encodeData(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize int64, buffers [][]byte, outputs []*os.File) error {
+func encodeData(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize int64, buffers [][]byte, outputs []*os.File, ctx *ECContext) error {
 
 	bufferSize := int64(len(buffers[0]))
 	if bufferSize == 0 {
@@ -131,7 +166,7 @@ func encodeData(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize i
 	}
 
 	for b := int64(0); b < batchCount; b++ {
-		err := encodeDataOneBatch(file, enc, startOffset+b*bufferSize, blockSize, buffers, outputs)
+		err := encodeDataOneBatch(file, enc, startOffset+b*bufferSize, blockSize, buffers, outputs, ctx)
 		if err != nil {
 			return err
 		}
@@ -140,9 +175,9 @@ func encodeData(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize i
 	return nil
 }
 
-func openEcFiles(baseFileName string, forRead bool) (files []*os.File, err error) {
-	for i := 0; i < TotalShardsCount; i++ {
-		fname := baseFileName + ToExt(i)
+func openEcFiles(baseFileName string, forRead bool, ctx *ECContext) (files []*os.File, err error) {
+	for i := 0; i < ctx.Total(); i++ {
+		fname := baseFileName + ctx.ToExt(i)
 		openOption := os.O_TRUNC | os.O_CREATE | os.O_WRONLY
 		if forRead {
 			openOption = os.O_RDONLY
@@ -164,10 +199,10 @@ func closeEcFiles(files []*os.File) {
 	}
 }
 
-func encodeDataOneBatch(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize int64, buffers [][]byte, outputs []*os.File) error {
+func encodeDataOneBatch(file *os.File, enc reedsolomon.Encoder, startOffset, blockSize int64, buffers [][]byte, outputs []*os.File, ctx *ECContext) error {
 
 	// read data into buffers
-	for i := 0; i < DataShardsCount; i++ {
+	for i := 0; i < ctx.DataShards; i++ {
 		n, err := file.ReadAt(buffers[i], startOffset+blockSize*int64(i))
 		if err != nil {
 			if err != io.EOF {
@@ -186,7 +221,7 @@ func encodeDataOneBatch(file *os.File, enc reedsolomon.Encoder, startOffset, blo
 		return err
 	}
 
-	for i := 0; i < TotalShardsCount; i++ {
+	for i := 0; i < ctx.Total(); i++ {
 		_, err := outputs[i].Write(buffers[i])
 		if err != nil {
 			return err
@@ -196,53 +231,57 @@ func encodeDataOneBatch(file *os.File, enc reedsolomon.Encoder, startOffset, blo
 	return nil
 }
 
-func encodeDatFile(remainingSize int64, baseFileName string, bufferSize int, largeBlockSize int64, file *os.File, smallBlockSize int64) error {
+func encodeDatFile(remainingSize int64, baseFileName string, bufferSize int, largeBlockSize int64, file *os.File, smallBlockSize int64, ctx *ECContext) error {
 
 	var processedSize int64
 
-	enc, err := reedsolomon.New(DataShardsCount, ParityShardsCount)
+	enc, err := ctx.CreateEncoder()
 	if err != nil {
 		return fmt.Errorf("failed to create encoder: %w", err)
 	}
 
-	buffers := make([][]byte, TotalShardsCount)
+	buffers := make([][]byte, ctx.Total())
 	for i := range buffers {
 		buffers[i] = make([]byte, bufferSize)
 	}
 
-	outputs, err := openEcFiles(baseFileName, false)
+	outputs, err := openEcFiles(baseFileName, false, ctx)
 	defer closeEcFiles(outputs)
 	if err != nil {
 		return fmt.Errorf("failed to open ec files %s: %v", baseFileName, err)
 	}
 
-	for remainingSize > largeBlockSize*DataShardsCount {
-		err = encodeData(file, enc, processedSize, largeBlockSize, buffers, outputs)
+	// Pre-calculate row sizes to avoid redundant calculations in loops
+	largeRowSize := largeBlockSize * int64(ctx.DataShards)
+	smallRowSize := smallBlockSize * int64(ctx.DataShards)
+
+	for remainingSize >= largeRowSize {
+		err = encodeData(file, enc, processedSize, largeBlockSize, buffers, outputs, ctx)
 		if err != nil {
 			return fmt.Errorf("failed to encode large chunk data: %w", err)
 		}
-		remainingSize -= largeBlockSize * DataShardsCount
-		processedSize += largeBlockSize * DataShardsCount
+		remainingSize -= largeRowSize
+		processedSize += largeRowSize
 	}
 	for remainingSize > 0 {
-		err = encodeData(file, enc, processedSize, smallBlockSize, buffers, outputs)
+		err = encodeData(file, enc, processedSize, smallBlockSize, buffers, outputs, ctx)
 		if err != nil {
 			return fmt.Errorf("failed to encode small chunk data: %w", err)
 		}
-		remainingSize -= smallBlockSize * DataShardsCount
-		processedSize += smallBlockSize * DataShardsCount
+		remainingSize -= smallRowSize
+		processedSize += smallRowSize
 	}
 	return nil
 }
 
-func rebuildEcFiles(shardHasData []bool, inputFiles []*os.File, outputFiles []*os.File) error {
+func rebuildEcFiles(shardHasData []bool, inputFiles []*os.File, outputFiles []*os.File, ctx *ECContext) error {
 
-	enc, err := reedsolomon.New(DataShardsCount, ParityShardsCount)
+	enc, err := ctx.CreateEncoder()
 	if err != nil {
 		return fmt.Errorf("failed to create encoder: %w", err)
 	}
 
-	buffers := make([][]byte, TotalShardsCount)
+	buffers := make([][]byte, ctx.Total())
 	for i := range buffers {
 		if shardHasData[i] {
 			buffers[i] = make([]byte, ErasureCodingSmallBlockSize)
@@ -254,7 +293,7 @@ func rebuildEcFiles(shardHasData []bool, inputFiles []*os.File, outputFiles []*o
 	for {
 
 		// read the input data from files
-		for i := 0; i < TotalShardsCount; i++ {
+		for i := 0; i < ctx.Total(); i++ {
 			if shardHasData[i] {
 				n, _ := inputFiles[i].ReadAt(buffers[i], startOffset)
 				if n == 0 {
@@ -278,7 +317,7 @@ func rebuildEcFiles(shardHasData []bool, inputFiles []*os.File, outputFiles []*o
 		}
 
 		// write the data to output files
-		for i := 0; i < TotalShardsCount; i++ {
+		for i := 0; i < ctx.Total(); i++ {
 			if !shardHasData[i] {
 				n, _ := outputFiles[i].WriteAt(buffers[i][:inputBufferDataSize], startOffset)
 				if inputBufferDataSize != n {
diff --git a/weed/storage/erasure_coding/ec_test.go b/weed/storage/erasure_coding/ec_test.go
index b1cc9c441..cbb20832c 100644
--- a/weed/storage/erasure_coding/ec_test.go
+++ b/weed/storage/erasure_coding/ec_test.go
@@ -23,7 +23,10 @@ func TestEncodingDecoding(t *testing.T) {
 	bufferSize := 50
 	baseFileName := "1"
 
-	err := generateEcFiles(baseFileName, bufferSize, largeBlockSize, smallBlockSize)
+	// Create default EC context for testing
+	ctx := NewDefaultECContext("", 0)
+
+	err := generateEcFiles(baseFileName, bufferSize, largeBlockSize, smallBlockSize, ctx)
 	if err != nil {
 		t.Logf("generateEcFiles: %v", err)
 	}
@@ -33,16 +36,16 @@ func TestEncodingDecoding(t *testing.T) {
 		t.Logf("WriteSortedFileFromIdx: %v", err)
 	}
 
-	err = validateFiles(baseFileName)
+	err = validateFiles(baseFileName, ctx)
 	if err != nil {
 		t.Logf("WriteSortedFileFromIdx: %v", err)
 	}
 
-	removeGeneratedFiles(baseFileName)
+	removeGeneratedFiles(baseFileName, ctx)
 
 }
 
-func validateFiles(baseFileName string) error {
+func validateFiles(baseFileName string, ctx *ECContext) error {
 	nm, err := readNeedleMap(baseFileName)
 	if err != nil {
 		return fmt.Errorf("readNeedleMap: %v", err)
@@ -60,7 +63,7 @@ func validateFiles(baseFileName string) error {
 		return fmt.Errorf("failed to stat dat file: %v", err)
 	}
 
-	ecFiles, err := openEcFiles(baseFileName, true)
+	ecFiles, err := openEcFiles(baseFileName, true, ctx)
 	if err != nil {
 		return fmt.Errorf("error opening ec files: %w", err)
 	}
@@ -184,9 +187,9 @@ func readFromFile(file *os.File, data []byte, ecFileOffset int64) (err error) {
 	return
 }
 
-func removeGeneratedFiles(baseFileName string) {
-	for i := 0; i < DataShardsCount+ParityShardsCount; i++ {
-		fname := fmt.Sprintf("%s.ec%02d", baseFileName, i)
+func removeGeneratedFiles(baseFileName string, ctx *ECContext) {
+	for i := 0; i < ctx.Total(); i++ {
+		fname := baseFileName + ctx.ToExt(i)
 		os.Remove(fname)
 	}
 	os.Remove(baseFileName + ".ecx")
diff --git a/weed/storage/erasure_coding/ec_volume.go b/weed/storage/erasure_coding/ec_volume.go
index 839428e7b..3e323163e 100644
--- a/weed/storage/erasure_coding/ec_volume.go
+++ b/weed/storage/erasure_coding/ec_volume.go
@@ -41,7 +41,8 @@ type EcVolume struct {
 	ecjFileAccessLock         sync.Mutex
 	diskType                  types.DiskType
 	datFileSize               int64
-	ExpireAtSec               uint64 //ec volume destroy time, calculated from the ec volume was created
+	ExpireAtSec               uint64     //ec volume destroy time, calculated from the ec volume was created
+	ECContext                 *ECContext // EC encoding parameters
 }
 
 func NewEcVolume(diskType types.DiskType, dir string, dirIdx string, collection string, vid needle.VolumeId) (ev *EcVolume, err error) {
@@ -73,9 +74,32 @@ func NewEcVolume(diskType types.DiskType, dir string, dirIdx string, collection
 		ev.Version = needle.Version(volumeInfo.Version)
 		ev.datFileSize = volumeInfo.DatFileSize
 		ev.ExpireAtSec = volumeInfo.ExpireAtSec
+		
+		// Initialize EC context from .vif if present; fallback to defaults
+		if volumeInfo.EcShardConfig != nil {
+			ds := int(volumeInfo.EcShardConfig.DataShards)
+			ps := int(volumeInfo.EcShardConfig.ParityShards)
+			
+			// Validate shard counts to prevent zero or invalid values
+			if ds <= 0 || ps <= 0 || ds+ps > MaxShardCount {
+				glog.Warningf("Invalid EC config in VolumeInfo for volume %d (data=%d, parity=%d), using defaults", vid, ds, ps)
+				ev.ECContext = NewDefaultECContext(collection, vid)
+			} else {
+				ev.ECContext = &ECContext{
+					Collection:   collection,
+					VolumeId:     vid,
+					DataShards:   ds,
+					ParityShards: ps,
+				}
+				glog.V(1).Infof("Loaded EC config from VolumeInfo for volume %d: %s", vid, ev.ECContext.String())
+			}
+		} else {
+			ev.ECContext = NewDefaultECContext(collection, vid)
+		}
 	} else {
 		glog.Warningf("vif file not found,volumeId:%d, filename:%s", vid, dataBaseFileName)
 		volume_info.SaveVolumeInfo(dataBaseFileName+".vif", &volume_server_pb.VolumeInfo{Version: uint32(ev.Version)})
+		ev.ECContext = NewDefaultECContext(collection, vid)
 	}
 
 	ev.ShardLocations = make(map[ShardId][]pb.ServerAddress)
@@ -260,7 +284,7 @@ func (ev *EcVolume) LocateEcShardNeedleInterval(version needle.Version, offset i
 	if ev.datFileSize > 0 {
 		// To get the correct LargeBlockRowsCount
 		// use datFileSize to calculate the shardSize to match the EC encoding logic.
-		shardSize = ev.datFileSize / DataShardsCount
+		shardSize = ev.datFileSize / int64(ev.ECContext.DataShards)
 	}
 	// calculate the locations in the ec shards
 	intervals = LocateData(ErasureCodingLargeBlockSize, ErasureCodingSmallBlockSize, shardSize, offset, types.Size(needle.GetActualSize(size, version)))
diff --git a/weed/storage/erasure_coding/ec_volume_info.go b/weed/storage/erasure_coding/ec_volume_info.go
index 53b352168..4d34ccbde 100644
--- a/weed/storage/erasure_coding/ec_volume_info.go
+++ b/weed/storage/erasure_coding/ec_volume_info.go
@@ -87,7 +87,7 @@ func (ecInfo *EcVolumeInfo) Minus(other *EcVolumeInfo) *EcVolumeInfo {
 
 	// Copy shard sizes for remaining shards
 	retIndex := 0
-	for shardId := ShardId(0); shardId < TotalShardsCount && retIndex < len(ret.ShardSizes); shardId++ {
+	for shardId := ShardId(0); shardId < ShardId(MaxShardCount) && retIndex < len(ret.ShardSizes); shardId++ {
 		if ret.ShardBits.HasShardId(shardId) {
 			if size, exists := ecInfo.GetShardSize(shardId); exists {
 				ret.ShardSizes[retIndex] = size
@@ -119,19 +119,28 @@ func (ecInfo *EcVolumeInfo) ToVolumeEcShardInformationMessage() (ret *master_pb.
 type ShardBits uint32 // use bits to indicate the shard id, use 32 bits just for possible future extension
 
 func (b ShardBits) AddShardId(id ShardId) ShardBits {
+	if id >= MaxShardCount {
+		return b // Reject out-of-range shard IDs
+	}
 	return b | (1 << id)
 }
 
 func (b ShardBits) RemoveShardId(id ShardId) ShardBits {
+	if id >= MaxShardCount {
+		return b // Reject out-of-range shard IDs
+	}
 	return b &^ (1 << id)
 }
 
 func (b ShardBits) HasShardId(id ShardId) bool {
+	if id >= MaxShardCount {
+		return false // Out-of-range shard IDs are never present
+	}
 	return b&(1<<id) > 0
 }
 
 func (b ShardBits) ShardIds() (ret []ShardId) {
-	for i := ShardId(0); i < TotalShardsCount; i++ {
+	for i := ShardId(0); i < ShardId(MaxShardCount); i++ {
 		if b.HasShardId(i) {
 			ret = append(ret, i)
 		}
@@ -140,7 +149,7 @@ func (b ShardBits) ShardIds() (ret []ShardId) {
 }
 
 func (b ShardBits) ToUint32Slice() (ret []uint32) {
-	for i := uint32(0); i < TotalShardsCount; i++ {
+	for i := uint32(0); i < uint32(MaxShardCount); i++ {
 		if b.HasShardId(ShardId(i)) {
 			ret = append(ret, i)
 		}
@@ -164,6 +173,8 @@ func (b ShardBits) Plus(other ShardBits) ShardBits {
 }
 
 func (b ShardBits) MinusParityShards() ShardBits {
+	// Removes parity shards from the bit mask
+	// Assumes default 10+4 EC layout where parity shards are IDs 10-13
 	for i := DataShardsCount; i < TotalShardsCount; i++ {
 		b = b.RemoveShardId(ShardId(i))
 	}
@@ -205,7 +216,7 @@ func (b ShardBits) IndexToShardId(index int) (shardId ShardId, found bool) {
 	}
 
 	currentIndex := 0
-	for i := ShardId(0); i < TotalShardsCount; i++ {
+	for i := ShardId(0); i < ShardId(MaxShardCount); i++ {
 		if b.HasShardId(i) {
 			if currentIndex == index {
 				return i, true
@@ -234,7 +245,7 @@ func (ecInfo *EcVolumeInfo) resizeShardSizes(prevShardBits ShardBits) {
 	// Copy existing sizes to new positions based on current ShardBits
 	if len(ecInfo.ShardSizes) > 0 {
 		newIndex := 0
-		for shardId := ShardId(0); shardId < TotalShardsCount && newIndex < expectedLength; shardId++ {
+		for shardId := ShardId(0); shardId < ShardId(MaxShardCount) && newIndex < expectedLength; shardId++ {
 			if ecInfo.ShardBits.HasShardId(shardId) {
 				// Try to find the size for this shard in the old array using previous ShardBits
 				if oldIndex, found := prevShardBits.ShardIdToIndex(shardId); found && oldIndex < len(ecInfo.ShardSizes) {
diff --git a/weed/storage/store_ec.go b/weed/storage/store_ec.go
index 0126ad9d4..6a26b4ae0 100644
--- a/weed/storage/store_ec.go
+++ b/weed/storage/store_ec.go
@@ -350,7 +350,8 @@ func (s *Store) recoverOneRemoteEcShardInterval(needleId types.NeedleId, ecVolum
 		return 0, false, fmt.Errorf("failed to create encoder: %w", err)
 	}
 
-	bufs := make([][]byte, erasure_coding.TotalShardsCount)
+	// Use MaxShardCount to support custom EC ratios up to 32 shards
+	bufs := make([][]byte, erasure_coding.MaxShardCount)
 
 	var wg sync.WaitGroup
 	ecVolume.ShardLocationsLock.RLock()
diff --git a/weed/topology/topology_ec.go b/weed/topology/topology_ec.go
index 844e92f55..c8b511338 100644
--- a/weed/topology/topology_ec.go
+++ b/weed/topology/topology_ec.go
@@ -10,7 +10,8 @@ import (
 
 type EcShardLocations struct {
 	Collection string
-	Locations  [erasure_coding.TotalShardsCount][]*DataNode
+	// Use MaxShardCount (32) to support custom EC ratios
+	Locations [erasure_coding.MaxShardCount][]*DataNode
 }
 
 func (t *Topology) SyncDataNodeEcShards(shardInfos []*master_pb.VolumeEcShardInformationMessage, dn *DataNode) (newShards, deletedShards []*erasure_coding.EcVolumeInfo) {
@@ -90,6 +91,10 @@ func NewEcShardLocations(collection string) *EcShardLocations {
 }
 
 func (loc *EcShardLocations) AddShard(shardId erasure_coding.ShardId, dn *DataNode) (added bool) {
+	// Defensive bounds check to prevent panic with out-of-range shard IDs
+	if int(shardId) >= erasure_coding.MaxShardCount {
+		return false
+	}
 	dataNodes := loc.Locations[shardId]
 	for _, n := range dataNodes {
 		if n.Id() == dn.Id() {
@@ -101,6 +106,10 @@ func (loc *EcShardLocations) AddShard(shardId erasure_coding.ShardId, dn *DataNo
 }
 
 func (loc *EcShardLocations) DeleteShard(shardId erasure_coding.ShardId, dn *DataNode) (deleted bool) {
+	// Defensive bounds check to prevent panic with out-of-range shard IDs
+	if int(shardId) >= erasure_coding.MaxShardCount {
+		return false
+	}
 	dataNodes := loc.Locations[shardId]
 	foundIndex := -1
 	for index, n := range dataNodes {
diff --git a/weed/worker/tasks/erasure_coding/ec_task.go b/weed/worker/tasks/erasure_coding/ec_task.go
index 18f192bc9..df7fc94f9 100644
--- a/weed/worker/tasks/erasure_coding/ec_task.go
+++ b/weed/worker/tasks/erasure_coding/ec_task.go
@@ -374,7 +374,8 @@ func (t *ErasureCodingTask) generateEcShardsLocally(localFiles map[string]string
 	var generatedShards []string
 	var totalShardSize int64
 
-	for i := 0; i < erasure_coding.TotalShardsCount; i++ {
+	// Check up to MaxShardCount (32) to support custom EC ratios
+	for i := 0; i < erasure_coding.MaxShardCount; i++ {
 		shardFile := fmt.Sprintf("%s.ec%02d", baseName, i)
 		if info, err := os.Stat(shardFile); err == nil {
 			shardKey := fmt.Sprintf("ec%02d", i)