diff --git a/src/tfs/inc/ttier.h b/src/tfs/inc/ttier.h
index 38098902724a8c175b4e5f9b1d779cf1cf162f19..b0932909bb3adae71b266e877214c928fc1aab97 100644
--- a/src/tfs/inc/ttier.h
+++ b/src/tfs/inc/ttier.h
@@ -34,7 +34,7 @@ typedef struct {
 
 void   tdInitTier(STier *pTier, int level);
 void   tdDestroyTier(STier *pTier);
-SDisk *tdAddDiskToTier(STier *pTier, SDiskCfg *pCfg);
+SDisk *tdMountToTier(STier *pTier, SDiskCfg *pCfg);
 int    tdUpdateTierInfo(STier *pTier);
 
 #ifdef __cplusplus
diff --git a/src/tfs/src/tfs.c b/src/tfs/src/tfs.c
index 46e15fc9cfb2f06b11da7881d83e8b5a4ad867df..fe2df03473a43c42c002fad50059693b68aff40e 100644
--- a/src/tfs/src/tfs.c
+++ b/src/tfs/src/tfs.c
@@ -172,7 +172,7 @@ static int tfsMount(SDiskCfg *pCfg) {
   if (tfsCheckAndFormatCfg(pCfg) < 0) return -1;
 
   did.level = pCfg->level;
-  did.id = tdAddDiskToTier(TIER_AT(pCfg->level), pCfg);
+  did.id = tdMountToTier(TIER_AT(pCfg->level), pCfg);
   if (did.id < 0) {
     fError("failed to mount %s to FS since %s", pCfg->dir, tstrerror(terrno));
     return -1;
diff --git a/src/tfs/src/ttier.c b/src/tfs/src/ttier.c
index 10db8678ec0055684c2f99467d301ec0cdc1b917..876a281ceb0a24a404c0f2a06415655f6b512c93 100644
--- a/src/tfs/src/ttier.c
+++ b/src/tfs/src/ttier.c
@@ -29,7 +29,7 @@ void tdDestroyTier(STier *pTier) {
   pTier->ndisk = 0;
 }
 
-SDisk *tdAddDiskToTier(STier *pTier, SDiskCfg *pCfg) {
+SDisk *tdMountToTier(STier *pTier, SDiskCfg *pCfg) {
   ASSERT(pTier->level == pCfg->level);
   int id = 0;