diff --git a/blobstore/cli/blobnode/iostat.go b/blobstore/cli/blobnode/iostat.go
index 3ca0ac40e..0a9a479dd 100644
--- a/blobstore/cli/blobnode/iostat.go
+++ b/blobstore/cli/blobnode/iostat.go
@@ -26,6 +26,7 @@ import (
 
 	"github.com/desertbit/grumble"
 
+	"github.com/cubefs/cubefs/blobstore/blobnode/base/flow"
 	"github.com/cubefs/cubefs/blobstore/cli/common/fmt"
 	"github.com/cubefs/cubefs/blobstore/common/iostat"
 )
@@ -158,6 +159,10 @@ func scanVDevices(dir string, filters []string) ([]*vdevice, error) {
 			continue
 		}
 
+		if !strings.HasSuffix(name, flow.IOStatFileSuffix) {
+			continue
+		}
+
 		dev, err := newVDevice(dir, name)
 		if err != nil {
 			return nil, err