simplify

weed/topology/disk.go

@@ -180,12 +180,12 @@ func (d *Disk) doAddOrUpdateVolume(v storage.VolumeInfo) (isNew, isChanged bool)
 			// Adjust active volume count when ReadOnly status changes
 			// Use a separate delta object to avoid affecting other metric adjustments
 			readOnlyDelta := &DiskUsageCounts{}
-			if !v.ReadOnly && oldV.ReadOnly {
-				// Changed from read-only to writable
-				readOnlyDelta.activeVolumeCount = 1
-			} else if v.ReadOnly && !oldV.ReadOnly {
+			if v.ReadOnly {
 				// Changed from writable to read-only
 				readOnlyDelta.activeVolumeCount = -1
+			} else {
+				// Changed from read-only to writable
+				readOnlyDelta.activeVolumeCount = 1
 			}
 			d.UpAdjustDiskUsageDelta(types.ToDiskType(v.DiskType), readOnlyDelta)
 		}