diff --git a/src/common/inc/tglobal.h b/src/common/inc/tglobal.h
index e08a56fb326849b63bf511ca8cc8d80103f6f881..054c8942516702efeb64f9b7c9e26a3d5c28c847 100644
--- a/src/common/inc/tglobal.h
+++ b/src/common/inc/tglobal.h
@@ -131,7 +131,6 @@ extern char    tsDataDir[];
 extern char    tsLogDir[];
 extern char    tsScriptDir[];
 extern int64_t tsMsPerDay[3];
-extern char    tsVnodeBakDir[];
 
 // system info
 extern char    tsOsName[];
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index c24ba490ba7f4cb25ba032b0404790d68540c826..c02c8af1e4d4a0fbbddd9228f147a88091148f7f 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -160,7 +160,6 @@ char    tsDnodeDir[TSDB_FILENAME_LEN] = {0};
 char    tsMnodeDir[TSDB_FILENAME_LEN] = {0};
 char    tsDataDir[TSDB_FILENAME_LEN] = {0};
 char    tsScriptDir[TSDB_FILENAME_LEN] = {0};
-char    tsVnodeBakDir[TSDB_FILENAME_LEN] = {0};
 
 /*
  * minimum scale for whole system, millisecond by default
diff --git a/src/dnode/src/dnodeMain.c b/src/dnode/src/dnodeMain.c
index 6abe55e22751c0ee175216fd688df47d4599cfd8..995734b3315d2fe2e08200c3c312a50c9a7b6167 100644
--- a/src/dnode/src/dnodeMain.c
+++ b/src/dnode/src/dnodeMain.c
@@ -181,15 +181,17 @@ static int32_t dnodeInitStorage() {
     dError("failed to add disks to dnode tier since %s", tstrerror(terrno));
     return -1;
   }
+  strncpy(tsDataDir, DNODE_PRIMARY_DISK(pDnodeTier)->dir, TSDB_FILENAME_LEN);
+  tdGetVnodeRootDir(tsDataDir, tsVnodeDir);
 
   //TODO(dengyihao): no need to init here 
-  tdGetMnodeRootDir(DNODE_PRIMARY_DISK(pDnodeTier)->dir, tsMnodeDir);
+  tdGetMnodeRootDir(tsDataDir, tsMnodeDir);
   if (dnodeCreateDir(tsMnodeDir) < 0) {
    dError("failed to create dir: %s, reason: %s", tsMnodeDir, strerror(errno));
    return -1;
   } 
 
-  tdGetDnodeRootDir(DNODE_PRIMARY_DISK(pDnodeTier)->dir, tsDnodeDir);
+  tdGetDnodeRootDir(tsDataDir, tsDnodeDir);
   if (dnodeCreateDir(tsDnodeDir) < 0) {
    dError("failed to create dir: %s, reason: %s", tsDnodeDir, strerror(errno));
    return -1;