diff --git a/master/data_node.go b/master/data_node.go
index 7a5f6aafd..22526769e 100644
--- a/master/data_node.go
+++ b/master/data_node.go
@@ -280,9 +280,12 @@ func (dataNode *DataNode) canAllocDp() bool {
 		return false
 	}
 
-	if cnt := dataNode.availableDiskCount(); cnt == 0 {
-		log.LogWarnf("action[canAllocDp] dataNode [%v] availableDiskCount is 0 ", dataNode.Addr)
-		return false
+	// compatible with 3.4.0 before
+	if len(dataNode.AllDisks) != 0 {
+		if cnt := dataNode.availableDiskCount(); cnt == 0 {
+			log.LogWarnf("action[canAllocDp] dataNode [%v] availableDiskCount is 0 ", dataNode.Addr)
+			return false
+		}
 	}
 
 	if !dataNode.PartitionCntLimited() {
diff --git a/master/monitor_metrics.go b/master/monitor_metrics.go
index 0f781a852..847cb46e7 100644
--- a/master/monitor_metrics.go
+++ b/master/monitor_metrics.go
@@ -699,8 +699,8 @@ func (mm *monitorMetrics) setVolMetrics() {
 		mm.volNames[volName] = struct{}{}
 		delete(deleteVolNames, volName)
 
-		mm.volTotalSpace.SetWithLabelValues(float64(volStatInfo.TotalSize)/float64(util.GB), volName)
-		mm.volUsedSpace.SetWithLabelValues(float64(volStatInfo.UsedSize)/float64(util.GB), volName)
+		mm.volTotalSpace.SetWithLabelValues(float64(volStatInfo.TotalSize), volName)
+		mm.volUsedSpace.SetWithLabelValues(float64(volStatInfo.UsedSize), volName)
 		usedRatio, e := strconv.ParseFloat(volStatInfo.UsedRatio, 64)
 		if e == nil {
 			mm.volUsage.SetWithLabelValues(usedRatio, volName)
diff --git a/metanode/partition_op_uniq_test.go b/metanode/partition_op_uniq_test.go
index a47b93dab..9c91505e4 100644
--- a/metanode/partition_op_uniq_test.go
+++ b/metanode/partition_op_uniq_test.go
@@ -22,7 +22,7 @@ import (
 )
 
 func TestInodeOnce(t *testing.T) {
-	ino := &InodeOnce{
+	ino := &InodeOnceWithVersion{
 		UniqID: 123,
 		Inode:  456,
 	}