diff --git a/weed/topology/topology_vacuum.go b/weed/topology/topology_vacuum.go
index ca626e973..9d964489d 100644
--- a/weed/topology/topology_vacuum.go
+++ b/weed/topology/topology_vacuum.go
@@ -5,9 +5,10 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/chrislusf/seaweedfs/weed/storage/needle"
 	"google.golang.org/grpc"
 
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/operation"
 	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
@@ -105,7 +106,9 @@ func batchVacuumVolumeCommit(grpcDialOption grpc.DialOption, vl *VolumeLayout, v
 		} else {
 			glog.V(0).Infof("Complete Committing vacuum %d on %s", vid, dn.Url())
 		}
-		if isCommitSuccess {
+	}
+	if isCommitSuccess {
+		for _, dn := range locationlist.list {
 			vl.SetVolumeAvailable(dn, vid)
 		}
 	}
diff --git a/weed/topology/volume_layout.go b/weed/topology/volume_layout.go
index 7633b28be..a0c66516d 100644
--- a/weed/topology/volume_layout.go
+++ b/weed/topology/volume_layout.go
@@ -51,6 +51,9 @@ func (vl *VolumeLayout) RegisterVolume(v *storage.VolumeInfo, dn *DataNode) {
 	vl.accessLock.Lock()
 	defer vl.accessLock.Unlock()
 
+	defer vl.ensureCorrectWritables(v)
+	defer vl.rememberOversizedVolume(v)
+
 	if _, ok := vl.vid2location[v.Id]; !ok {
 		vl.vid2location[v.Id] = NewVolumeLocationList()
 	}
@@ -74,9 +77,6 @@ func (vl *VolumeLayout) RegisterVolume(v *storage.VolumeInfo, dn *DataNode) {
 		}
 	}
 
-	vl.rememberOversizedVolume(v)
-	vl.ensureCorrectWritables(v)
-
 }
 
 func (vl *VolumeLayout) rememberOversizedVolume(v *storage.VolumeInfo) {
@@ -109,22 +109,13 @@ func (vl *VolumeLayout) UnRegisterVolume(v *storage.VolumeInfo, dn *DataNode) {
 func (vl *VolumeLayout) ensureCorrectWritables(v *storage.VolumeInfo) {
 	if vl.vid2location[v.Id].Length() == vl.rp.GetCopyCount() && vl.isWritable(v) {
 		if _, ok := vl.oversizedVolumes[v.Id]; !ok {
-			vl.addToWritable(v.Id)
+			vl.setVolumeWritable(v.Id)
 		}
 	} else {
 		vl.removeFromWritable(v.Id)
 	}
 }
 
-func (vl *VolumeLayout) addToWritable(vid needle.VolumeId) {
-	for _, id := range vl.writables {
-		if vid == id {
-			return
-		}
-	}
-	vl.writables = append(vl.writables, vid)
-}
-
 func (vl *VolumeLayout) isOversized(v *storage.VolumeInfo) bool {
 	return uint64(v.Size) >= vl.volumeSizeLimit
 }
@@ -270,7 +261,17 @@ func (vl *VolumeLayout) SetVolumeAvailable(dn *DataNode, vid needle.VolumeId) bo
 	vl.accessLock.Lock()
 	defer vl.accessLock.Unlock()
 
+	vInfo, err := dn.GetVolumesById(v.Id)
+	if err != nil {
+		return false
+	}
+
 	vl.vid2location[vid].Set(dn)
+
+	if vInfo.ReadOnly {
+		return false
+	}
+
 	if vl.vid2location[vid].Length() == vl.rp.GetCopyCount() {
 		return vl.setVolumeWritable(vid)
 	}