address comments

* Performance: Avoid Double os.Stat() Call
* Platform Compatibility: Use filepath.Join

weed/storage/disk_location.go

@@ -153,7 +153,7 @@ func (l *DiskLocation) loadExistingVolume(dirEntry os.DirEntry, needleMapKind Ne
 
 	// skip if ec volumes exists, but validate EC files first
 	if skipIfEcVolumesExists {
-		ecxFilePath := l.IdxDirectory + "/" + volumeName + ".ecx"
+		ecxFilePath := filepath.Join(l.IdxDirectory, volumeName+".ecx")
 		if util.FileExists(ecxFilePath) {
 			// Check if EC volume is valid by verifying shard count
 			if !l.validateEcVolume(collection, vid) {

weed/storage/disk_location_ec.go

@@ -230,7 +230,7 @@ func (l *DiskLocation) loadAllEcShards() (err error) {
 			continue
 		}
 
-}
+	}
 
 	// Check for orphaned EC shards without .ecx file (incomplete EC encoding)
 	// This happens when encoding is interrupted after writing shards but before writing .ecx
@@ -305,11 +305,13 @@ func (l *DiskLocation) validateEcVolume(collection string, vid needle.VolumeId)
 	// Count existing EC shard files
 	for i := 0; i < erasure_coding.TotalShardsCount; i++ {
 		shardFileName := baseFileName + erasure_coding.ToExt(i)
-		if util.FileExists(shardFileName) {
+		if fi, err := os.Stat(shardFileName); err == nil {
 			// Check if file has non-zero size
-			if fi, err := os.Stat(shardFileName); err == nil && fi.Size() > 0 {
+			if fi.Size() > 0 {
 				shardCount++
 			}
+		} else if !os.IsNotExist(err) {
+			glog.Warningf("Failed to stat shard file %s: %v", shardFileName, err)
 		}
 	}
 
@@ -343,7 +345,7 @@ func (l *DiskLocation) removeEcVolumeFiles(collection string, vid needle.VolumeI
 				glog.Warningf("Failed to remove incomplete EC shard file %s: %v", shardFileName, err)
 			}
 		} else {
-			glog.V(0).Infof("Removed incomplete EC shard file: %s", shardFileName)
+			glog.V(2).Infof("Removed incomplete EC shard file: %s", shardFileName)
 		}
 	}
 
@@ -353,13 +355,13 @@ func (l *DiskLocation) removeEcVolumeFiles(collection string, vid needle.VolumeI
 			glog.Warningf("Failed to remove incomplete EC index file %s.ecx: %v", indexBaseFileName, err)
 		}
 	} else {
-		glog.V(0).Infof("Removed incomplete EC index file: %s.ecx", indexBaseFileName)
+		glog.V(2).Infof("Removed incomplete EC index file: %s.ecx", indexBaseFileName)
 	}
 	if err := os.Remove(indexBaseFileName + ".ecj"); err != nil {
 		if !os.IsNotExist(err) {
 			glog.Warningf("Failed to remove incomplete EC journal file %s.ecj: %v", indexBaseFileName, err)
 		}
 	} else {
-		glog.V(0).Infof("Removed incomplete EC journal file: %s.ecj", indexBaseFileName)
+		glog.V(2).Infof("Removed incomplete EC journal file: %s.ecj", indexBaseFileName)
 	}
 }