diff --git a/weed/server/master_grpc_server.go b/weed/server/master_grpc_server.go
index f06f5a278..0bcde6851 100644
--- a/weed/server/master_grpc_server.go
+++ b/weed/server/master_grpc_server.go
@@ -72,7 +72,7 @@ func (ms *MasterServer) SendHeartbeat(stream master_pb.Seaweed_SendHeartbeatServ
 			}
 		}
 
-		glog.V(1).Infof("master received heartbeat %s", heartbeat.String())
+		glog.V(2).Infof("master received heartbeat %s", heartbeat.String())
 		message := &master_pb.VolumeLocation{
 			Url:       dn.Url(),
 			PublicUrl: dn.PublicUrl,
diff --git a/weed/storage/store.go b/weed/storage/store.go
index 2f2c70171..b870cee4e 100644
--- a/weed/storage/store.go
+++ b/weed/storage/store.go
@@ -100,7 +100,7 @@ func (s *Store) addVolume(vid needle.VolumeId, collection string, needleMapKind
 			location.Directory, vid, collection, replicaPlacement, ttl)
 		if volume, err := NewVolume(location.Directory, collection, vid, needleMapKind, replicaPlacement, ttl, preallocate); err == nil {
 			location.SetVolume(vid, volume)
-			glog.V(0).Info("add volume", vid)
+			glog.V(0).Infof("add volume %d", vid)
 			s.NewVolumesChan <- master_pb.VolumeShortInformationMessage{
 				Id:               uint32(vid),
 				Collection:       collection,
@@ -207,7 +207,7 @@ func (s *Store) Write(i needle.VolumeId, n *needle.Needle) (size uint32, err err
 		return
 	}
 	glog.V(0).Infoln("volume", i, "not found!")
-	err = fmt.Errorf("Volume %d not found!", i)
+	err = fmt.Errorf("volume %d not found on %s:%d", i, s.Ip, s.Port)
 	return
 }
 
diff --git a/weed/topology/topology.go b/weed/topology/topology.go
index 44dd1484b..902e89bd1 100644
--- a/weed/topology/topology.go
+++ b/weed/topology/topology.go
@@ -2,6 +2,7 @@ package topology
 
 import (
 	"errors"
+	"fmt"
 	"math/rand"
 
 	"github.com/chrislusf/raft"
@@ -105,8 +106,11 @@ func (t *Topology) HasWritableVolume(option *VolumeGrowOption) bool {
 
 func (t *Topology) PickForWrite(count uint64, option *VolumeGrowOption) (string, uint64, *DataNode, error) {
 	vid, count, datanodes, err := t.GetVolumeLayout(option.Collection, option.ReplicaPlacement, option.Ttl).PickForWrite(count, option)
-	if err != nil || datanodes.Length() == 0 {
-		return "", 0, nil, errors.New("No writable volumes available!")
+	if err != nil {
+		return "", 0, nil, fmt.Errorf("failed to find writable volumes for collectio:%s replication:%s ttl:%s error: %v", option.Collection, option.ReplicaPlacement.String(), option.Ttl.String(), err)
+	}
+	if datanodes.Length() == 0 {
+		return "", 0, nil, fmt.Errorf("no writable volumes available for for collectio:%s replication:%s ttl:%s", option.Collection, option.ReplicaPlacement.String(), option.Ttl.String())
 	}
 	fileId, count := t.Sequence.NextFileId(count)
 	return needle.NewFileId(*vid, fileId, rand.Uint32()).String(), count, datanodes.Head(), nil
diff --git a/weed/wdclient/masterclient.go b/weed/wdclient/masterclient.go
index 9cdcc3235..e16356e9d 100644
--- a/weed/wdclient/masterclient.go
+++ b/weed/wdclient/masterclient.go
@@ -81,11 +81,11 @@ func (mc *MasterClient) tryAllMasters() {
 						PublicUrl: volumeLocation.PublicUrl,
 					}
 					for _, newVid := range volumeLocation.NewVids {
-						glog.V(0).Infof("%s: %s adds volume %d", mc.name, loc.Url, newVid)
+						glog.V(1).Infof("%s: %s adds volume %d", mc.name, loc.Url, newVid)
 						mc.addLocation(newVid, loc)
 					}
 					for _, deletedVid := range volumeLocation.DeletedVids {
-						glog.V(0).Infof("%s: %s removes volume %d", mc.name, loc.Url, deletedVid)
+						glog.V(1).Infof("%s: %s removes volume %d", mc.name, loc.Url, deletedVid)
 						mc.deleteLocation(deletedVid, loc)
 					}
 				}