diff --git a/source/libs/tfs/src/tfs.c b/source/libs/tfs/src/tfs.c
index be411744cf..582422dc94 100644
--- a/source/libs/tfs/src/tfs.c
+++ b/source/libs/tfs/src/tfs.c
@@ -291,6 +291,8 @@ int32_t tfsRename(STfs *pTfs, char *orname, char *nrname) {
       snprintf(oaname, TMPNAME_LEN, "%s%s%s", pDisk->path, TD_DIRSEP, orname);
       snprintf(naname, TMPNAME_LEN, "%s%s%s", pDisk->path, TD_DIRSEP, nrname);
       if (taosRenameFile(oaname, naname) != 0) {
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        fError("failed to rename %s to %s since %s", oaname, naname, terrstr());
         return -1;
       }
     }
@@ -402,8 +404,7 @@ static int32_t tfsCheckAndFormatCfg(STfs *pTfs, SDiskCfg *pCfg) {
   }
 
   if (tfsFormatDir(pCfg->dir, dirName) < 0) {
-    fError("failed to mount %s to FS since invalid dir format", pCfg->dir);
-    terrno = TSDB_CODE_FS_INVLD_CFG;
+    fError("failed to mount %s to FS since %s", pCfg->dir, terrstr());
     return -1;
   }
 
diff --git a/source/libs/tfs/test/tfsTest.cpp b/source/libs/tfs/test/tfsTest.cpp
index a85bea192c..09f634bf4a 100644
--- a/source/libs/tfs/test/tfsTest.cpp
+++ b/source/libs/tfs/test/tfsTest.cpp
@@ -12,16 +12,147 @@
 #include <gtest/gtest.h>
 #include "os.h"
 
+#include "tfs.h"
+
 class TfsTest : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() {}
+  static void SetUpTestSuite() { root = "/tmp/tfsTest"; }
   static void TearDownTestSuite() {}
 
  public:
   void SetUp() override {}
   void TearDown() override {}
+
+  static const char *root;
 };
 
+const char *TfsTest::root;
+
 TEST_F(TfsTest, 01_Open_Close) {
-  
+  SDiskCfg dCfg = {0};
+  tstrncpy(dCfg.dir, root, TSDB_FILENAME_LEN);
+  dCfg.level = 0;
+  dCfg.primary = 1;
+
+  taosRemoveDir(root);
+  STfs *pTfs = tfsOpen(&dCfg, 1);
+  ASSERT_EQ(pTfs, nullptr);
+
+  taosMkDir(root);
+  pTfs = tfsOpen(&dCfg, 1);
+  ASSERT_NE(pTfs, nullptr);
+
+  tfsUpdateSize(pTfs);
+  SDiskSize size = tfsGetSize(pTfs);
+
+  EXPECT_GT(size.avail, 0);
+  EXPECT_GT(size.used, 0);
+  EXPECT_GT(size.total, size.avail);
+  EXPECT_GT(size.total, size.used);
+
+  tfsClose(pTfs);
 }
+
+TEST_F(TfsTest, 02_AllocDisk) {
+  int32_t  code = 0;
+  SDiskCfg dCfg = {0};
+  tstrncpy(dCfg.dir, root, TSDB_FILENAME_LEN);
+  dCfg.level = 0;
+  dCfg.primary = 1;
+
+  taosMkDir(root);
+  STfs *pTfs = tfsOpen(&dCfg, 1);
+  ASSERT_NE(pTfs, nullptr);
+
+  SDiskID did;
+  did.id = 0;
+  did.level = 0;
+
+  code = tfsAllocDisk(pTfs, 0, &did);
+  EXPECT_EQ(code, 0);
+  EXPECT_EQ(did.id, 0);
+  EXPECT_EQ(did.level, 0);
+
+  did.id = 1;
+  did.level = 1;
+  code = tfsAllocDisk(pTfs, 0, &did);
+  EXPECT_EQ(code, 0);
+  EXPECT_EQ(did.id, 0);
+  EXPECT_EQ(did.level, 0);
+
+  did.id = 1;
+  did.level = 2;
+  code = tfsAllocDisk(pTfs, 0, &did);
+  EXPECT_EQ(code, 0);
+  EXPECT_EQ(did.id, 0);
+  EXPECT_EQ(did.level, 0);
+
+  did.id = 1;
+  did.level = 3;
+  code = tfsAllocDisk(pTfs, 0, &did);
+  EXPECT_EQ(code, 0);
+  EXPECT_EQ(did.id, 0);
+  EXPECT_EQ(did.level, 0);
+
+  const char *primary = tfsGetPrimaryPath(pTfs);
+  EXPECT_STREQ(primary, root);
+
+  const char *path = tfsGetDiskPath(pTfs, did);
+  EXPECT_STREQ(path, root);
+
+  tfsClose(pTfs);
+}
+
+TEST_F(TfsTest, 03_Dir) {
+  int32_t  code = 0;
+  SDiskCfg dCfg = {0};
+  tstrncpy(dCfg.dir, root, TSDB_FILENAME_LEN);
+  dCfg.level = 0;
+  dCfg.primary = 1;
+
+  taosMkDir(root);
+  STfs *pTfs = tfsOpen(&dCfg, 1);
+  ASSERT_NE(pTfs, nullptr);
+
+  char p1[] = "p1";
+  char ap1[128] = {0};
+  snprintf(ap1, 128, "%s%s%s", root, TD_DIRSEP, p1);
+  EXPECT_NE(taosDirExist(ap1), 0);
+  EXPECT_EQ(tfsMkdir(pTfs, p1), 0);
+  EXPECT_EQ(taosDirExist(ap1), 0);
+
+  char p2[] = "p2";
+  char ap2[128] = {0};
+  snprintf(ap2, 128, "%s%s%s", root, TD_DIRSEP, p2);
+  SDiskID did = {0};
+  EXPECT_NE(taosDirExist(ap2), 0);
+  EXPECT_EQ(tfsMkdirAt(pTfs, p2, did), 0);
+  EXPECT_EQ(taosDirExist(ap2), 0);
+
+  char p3[] = "p3/p2/p1/p0";
+  char ap3[128] ={0};
+  snprintf(ap3, 128, "%s%s%s", root, TD_DIRSEP, p3);
+  EXPECT_NE(taosDirExist(ap3), 0);
+  EXPECT_NE(tfsMkdir(pTfs, p3), 0);
+  EXPECT_NE(tfsMkdirAt(pTfs, p3, did), 0);
+  EXPECT_EQ(tfsMkdirRecurAt(pTfs, p3, did), 0);
+  EXPECT_EQ(taosDirExist(ap3), 0);
+
+  EXPECT_EQ(tfsRmdir(pTfs, p3), 0);
+  EXPECT_NE(taosDirExist(ap3), 0);
+
+  char p45[] = "p5";
+  char p44[] = "p4";
+  char p4[] = "p4/p2/p1/p0";
+  char ap4[128] = {0};
+  snprintf(ap4, 128, "%s%s%s", root, TD_DIRSEP, p4);
+
+  EXPECT_NE(taosDirExist(ap4), 0);
+  EXPECT_EQ(tfsMkdirRecurAt(pTfs, p4, did), 0);
+  EXPECT_EQ(taosDirExist(ap4), 0);
+  EXPECT_EQ(tfsRename(pTfs, p44, p45), 0);
+  EXPECT_EQ(tfsRmdir(pTfs, p4), 0);
+  EXPECT_NE(taosDirExist(ap4), 0);
+
+  tfsClose(pTfs);
+}
\ No newline at end of file