diff --git a/weed/command/export.go b/weed/command/export.go
index a95ea7b9a..78d75ef52 100644
--- a/weed/command/export.go
+++ b/weed/command/export.go
@@ -70,13 +70,13 @@ var (
 	localLocation, _             = time.LoadLocation("Local")
 )
 
-func printNeedle(vid needle.VolumeId, n *needle.Needle, version needle.Version, deleted bool) {
+func printNeedle(vid needle.VolumeId, n *needle.Needle, version needle.Version, deleted bool, offset int64, onDiskSize int64) {
 	key := needle.NewFileIdFromNeedle(vid, n).String()
 	size := int32(n.DataSize)
 	if version == needle.Version1 {
 		size = int32(n.Size)
 	}
-	fmt.Printf("%s\t%s\t%d\t%t\t%s\t%s\t%s\t%t\n",
+	fmt.Printf("%s\t%s\t%d\t%t\t%s\t%s\t%s\t%t\t%d\t%d\n",
 		key,
 		n.Name,
 		size,
@@ -85,6 +85,8 @@ func printNeedle(vid needle.VolumeId, n *needle.Needle, version needle.Version,
 		n.LastModifiedString(),
 		n.Ttl.String(),
 		deleted,
+		offset,
+		offset+onDiskSize,
 	)
 }
 
@@ -124,17 +126,17 @@ func (scanner *VolumeFileScanner4Export) VisitNeedle(n *needle.Needle, offset in
 		if tarOutputFile != nil {
 			return writeFile(vid, n)
 		} else {
-			printNeedle(vid, n, scanner.version, false)
+			printNeedle(vid, n, scanner.version, false, offset, n.DiskSize(scanner.version))
 			return nil
 		}
 	}
 	if !ok {
 		if *showDeleted && tarOutputFile == nil {
 			if n.DataSize > 0 {
-				printNeedle(vid, n, scanner.version, true)
+				printNeedle(vid, n, scanner.version, true, offset, n.DiskSize(scanner.version))
 			} else {
 				n.Name = []byte("*tombstone")
-				printNeedle(vid, n, scanner.version, true)
+				printNeedle(vid, n, scanner.version, true, offset, n.DiskSize(scanner.version))
 			}
 		}
 		glog.V(2).Infof("This seems deleted %d size %d", n.Id, n.Size)
@@ -208,7 +210,7 @@ func runExport(cmd *Command, args []string) bool {
 	}
 
 	if tarOutputFile == nil {
-		fmt.Printf("key\tname\tsize\tgzip\tmime\tmodified\tttl\tdeleted\n")
+		fmt.Printf("key\tname\tsize\tgzip\tmime\tmodified\tttl\tdeleted\tstart\tstop\n")
 	}
 
 	err = storage.ScanVolumeFile(util.ResolvePath(*export.dir), *export.collection, vid, storage.NeedleMapInMemory, volumeFileScanner)
diff --git a/weed/storage/needle/file_id.go b/weed/storage/needle/file_id.go
index 5dabb0f25..6055bdd1c 100644
--- a/weed/storage/needle/file_id.go
+++ b/weed/storage/needle/file_id.go
@@ -66,7 +66,7 @@ func formatNeedleIdCookie(key NeedleId, cookie Cookie) string {
 	NeedleIdToBytes(bytes[0:NeedleIdSize], key)
 	CookieToBytes(bytes[NeedleIdSize:NeedleIdSize+CookieSize], cookie)
 	nonzero_index := 0
-	for ; bytes[nonzero_index] == 0; nonzero_index++ {
+	for ; bytes[nonzero_index] == 0 && nonzero_index < NeedleIdSize; nonzero_index++ {
 	}
 	return hex.EncodeToString(bytes[nonzero_index:])
 }
diff --git a/weed/storage/volume_read_write.go b/weed/storage/volume_read_write.go
index e77010dbd..e11bde2cb 100644
--- a/weed/storage/volume_read_write.go
+++ b/weed/storage/volume_read_write.go
@@ -381,10 +381,8 @@ func ScanVolumeFile(dirname string, collection string, id needle.VolumeId,
 	if v, err = loadVolumeWithoutIndex(dirname, collection, id, needleMapKind); err != nil {
 		return fmt.Errorf("failed to load volume %d: %v", id, err)
 	}
-	if v.volumeInfo.Version == 0 {
-		if err = volumeFileScanner.VisitSuperBlock(v.SuperBlock); err != nil {
-			return fmt.Errorf("failed to process volume %d super block: %v", id, err)
-		}
+	if err = volumeFileScanner.VisitSuperBlock(v.SuperBlock); err != nil {
+		return fmt.Errorf("failed to process volume %d super block: %v", id, err)
 	}
 	defer v.Close()
 
@@ -406,8 +404,9 @@ func ScanVolumeFileFrom(version needle.Version, datBackend backend.BackendStorag
 	for n != nil {
 		var needleBody []byte
 		if volumeFileScanner.ReadNeedleBody() {
+			// println("needle", n.Id.String(), "offset", offset, "size", n.Size, "rest", rest)
 			if needleBody, err = n.ReadNeedleBody(datBackend, version, offset+NeedleHeaderSize, rest); err != nil {
-				glog.V(0).Infof("cannot read needle body: %v", err)
+				glog.V(0).Infof("cannot read needle head [%d, %d) body [%d, %d) body length %d: %v", offset, offset+NeedleHeaderSize, offset+NeedleHeaderSize, offset+NeedleHeaderSize+rest, rest, err)
 				// err = fmt.Errorf("cannot read needle body: %v", err)
 				// return
 			}