diff --git a/weed/pb/volume_server.proto b/weed/pb/volume_server.proto
index fcdad30ff..ae37a7b6b 100644
--- a/weed/pb/volume_server.proto
+++ b/weed/pb/volume_server.proto
@@ -525,6 +525,8 @@ 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;
+    uint32 data_shards_count = 8; // EC data shards (0 = use default 10)
+    uint32 parity_shards_count = 9; // EC parity shards (0 = use default 4)
 }
 message OldVersionVolumeInfo {
     repeated RemoteFile files = 1;