diff --git a/source/dnode/vnode/src/tsdb/tsdbFS2.c b/source/dnode/vnode/src/tsdb/tsdbFS2.c
index 2345cc599b..9b8a979d01 100644
--- a/source/dnode/vnode/src/tsdb/tsdbFS2.c
+++ b/source/dnode/vnode/src/tsdb/tsdbFS2.c
@@ -731,6 +731,7 @@ _exit:
   return code;
 }
 
+// return error code
 int32_t tsdbOpenFS(STsdb *pTsdb, STFileSystem **fs, int8_t rollback) {
   int32_t code;
   int32_t lino;
diff --git a/source/dnode/vnode/src/tsdb/tsdbOpen.c b/source/dnode/vnode/src/tsdb/tsdbOpen.c
index f9fede1d9b..cf8794770a 100644
--- a/source/dnode/vnode/src/tsdb/tsdbOpen.c
+++ b/source/dnode/vnode/src/tsdb/tsdbOpen.c
@@ -44,7 +44,7 @@ int64_t tsdbGetEarliestTs(STsdb *pTsdb) {
  * @param pVnode
  * @param ppTsdb
  * @param dir
- * @return int
+ * @return int 0: success, -1: failed
  */
 int tsdbOpen(SVnode *pVnode, STsdb **ppTsdb, const char *dir, STsdbKeepCfg *pKeepCfg, int8_t rollback, bool force) {
   STsdb *pTsdb = NULL;
@@ -79,7 +79,9 @@ int tsdbOpen(SVnode *pVnode, STsdb **ppTsdb, const char *dir, STsdbKeepCfg *pKee
   }
 
   // open tsdb
-  if (tsdbOpenFS(pTsdb, &pTsdb->pFS, rollback) < 0) {
+  int32_t code = tsdbOpenFS(pTsdb, &pTsdb->pFS, rollback);
+  if (code < 0) {
+    terrno = code;
     goto _err;
   }