diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index e7537f6969df3ebc28011674e456934df20ed8b1..8a0a9e1208b7fb45994be95200a3f2a2a0ceb4ff 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -465,7 +465,7 @@ typedef struct {
   SCompData *pCompData;
   SDataCols *pDataCols[2];
 
-  void *blockBuffer;  // Buffer to hold the whole data block
+  void *pBuffer;  // Buffer to hold the whole data block
   void *compBuffer;   // Buffer for temperary compress/decompress purpose
 } SRWHelper;
 
@@ -512,6 +512,7 @@ void    tsdbFitRetention(STsdbRepo *pRepo);
 int     tsdbAlterCacheTotalBlocks(STsdbRepo *pRepo, int totalBlocks);
 void    tsdbAdjustCacheBlocks(STsdbCache *pCache);
 int32_t tsdbGetMetaFileName(char *rootDir, char *fname);
+int     tsdbUpdateFileHeader(SFile *pFile, uint32_t version);
 
 #ifdef __cplusplus
 }
diff --git a/src/tsdb/src/tsdbFile.c b/src/tsdb/src/tsdbFile.c
index c9db9344c9e7ed1279d25183b98944f77d3649cb..50ef078a0c06499db096e3f8dd4aaff86eab495a 100644
--- a/src/tsdb/src/tsdbFile.c
+++ b/src/tsdb/src/tsdbFile.c
@@ -37,7 +37,6 @@ const char *tsdbFileSuffix[] = {
 
 static int compFGroupKey(const void *key, const void *fgroup);
 static int compFGroup(const void *arg1, const void *arg2);
-static int tsdbWriteFileHead(SFile *pFile);
 static int tsdbOpenFGroup(STsdbFileH *pFileH, char *dataDir, int fid);
 
 STsdbFileH *tsdbInitFileH(char *dataDir, STsdbCfg *pCfg) {
@@ -83,11 +82,21 @@ void tsdbCloseFileH(STsdbFileH *pFileH) {
 }
 
 static int tsdbInitFile(char *dataDir, int fid, const char *suffix, SFile *pFile) {
+  uint32_t version;
+  char buf[512] = "\0";
+
   tsdbGetFileName(dataDir, fid, suffix, pFile->fname);
   if (access(pFile->fname, F_OK|R_OK|W_OK) < 0) return -1;
   pFile->fd = -1;
-  // TODO: recover the file info
-  // pFile->info = {0};
+  if (tsdbOpenFile(pFile, O_RDONLY) < 0) return -1;
+
+  if (tread(pFile->fd, buf, TSDB_FILE_HEAD_SIZE) < TSDB_FILE_HEAD_SIZE) return -1;
+  if (!taosCheckChecksumWhole((uint8_t *)buf, TSDB_FILE_HEAD_SIZE)) return -1;
+
+  void *pBuf = buf;
+  pBuf = taosDecodeFixed32(pBuf, &version);
+  pBuf = tsdbDecodeSFileInfo(pBuf, &(pFile->info));
+
   return 0;
 }
 
@@ -284,18 +293,6 @@ static int compFGroup(const void *arg1, const void *arg2) {
   return ((SFileGroup *)arg1)->fileId - ((SFileGroup *)arg2)->fileId;
 }
 
-static int tsdbWriteFileHead(SFile *pFile) {
-  char head[TSDB_FILE_HEAD_SIZE] = "\0";
-
-  pFile->info.size += TSDB_FILE_HEAD_SIZE;
-
-  // TODO: write version and File statistic to the head
-  lseek(pFile->fd, 0, SEEK_SET);
-  if (write(pFile->fd, head, TSDB_FILE_HEAD_SIZE) < 0) return -1;
-
-  return 0;
-}
-
 int tsdbGetFileName(char *dataDir, int fileId, const char *suffix, char *fname) {
   if (dataDir == NULL || fname == NULL) return -1;
 
@@ -345,7 +342,9 @@ int tsdbCreateFile(char *dataDir, int fileId, const char *suffix, SFile *pFile)
     return -1;
   }
 
-  if (tsdbWriteFileHead(pFile) < 0) {
+  pFile->info.size = TSDB_FILE_HEAD_SIZE;
+
+  if (tsdbUpdateFileHeader(pFile, 0) < 0) {
     tsdbCloseFile(pFile);
     return -1;
   }
diff --git a/src/tsdb/src/tsdbRWHelper.c b/src/tsdb/src/tsdbRWHelper.c
index 4b3c91bb02839f8c4f75bb3c43a9cf7be1f3eea5..79507aa15b2042258911ce6bb6fd4fd5212b45fa 100644
--- a/src/tsdb/src/tsdbRWHelper.c
+++ b/src/tsdb/src/tsdbRWHelper.c
@@ -132,10 +132,10 @@ static int tsdbInitHelper(SRWHelper *pHelper, STsdbRepo *pRepo, tsdb_rw_helper_t
   // Init block part
   if (tsdbInitHelperBlock(pHelper) < 0) goto _err;
 
-  pHelper->blockBuffer =
+  pHelper->pBuffer =
       tmalloc(sizeof(SCompData) + (sizeof(SCompCol) + sizeof(TSCKSUM) + COMP_OVERFLOW_BYTES) * pHelper->config.maxCols +
               pHelper->config.maxRowSize * pHelper->config.maxRowsPerFileBlock + sizeof(TSCKSUM));
-  if (pHelper->blockBuffer == NULL) goto _err;
+  if (pHelper->pBuffer == NULL) goto _err;
 
   return 0;
 
@@ -155,7 +155,7 @@ int tsdbInitWriteHelper(SRWHelper *pHelper, STsdbRepo *pRepo) {
 
 void tsdbDestroyHelper(SRWHelper *pHelper) {
   if (pHelper) {
-    tzfree(pHelper->blockBuffer);
+    tzfree(pHelper->pBuffer);
     tzfree(pHelper->compBuffer);
     tsdbDestroyHelperFile(pHelper);
     tsdbDestroyHelperTable(pHelper);
@@ -241,6 +241,7 @@ int tsdbCloseHelperFile(SRWHelper *pHelper, bool hasError) {
     pHelper->files.headF.fd = -1;
   }
   if (pHelper->files.dataF.fd > 0) {
+    if (!hasError) tsdbUpdateFileHeader(&(pHelper->files.dataF), 0);
     close(pHelper->files.dataF.fd);
     pHelper->files.dataF.fd = -1;
   }
@@ -249,6 +250,7 @@ int tsdbCloseHelperFile(SRWHelper *pHelper, bool hasError) {
     pHelper->files.lastF.fd = -1;
   }
   if (pHelper->files.nHeadF.fd > 0) {
+    if (!hasError) tsdbUpdateFileHeader(&(pHelper->files.nHeadF), 0);
     close(pHelper->files.nHeadF.fd);
     pHelper->files.nHeadF.fd = -1;
     if (hasError) {
@@ -260,6 +262,7 @@ int tsdbCloseHelperFile(SRWHelper *pHelper, bool hasError) {
   }
   
   if (pHelper->files.nLastF.fd > 0) {
+    if (!hasError) tsdbUpdateFileHeader(&(pHelper->files.nLastF), 0);
     close(pHelper->files.nLastF.fd);
     pHelper->files.nLastF.fd = -1;
     if (hasError) {
@@ -419,7 +422,7 @@ int tsdbWriteCompInfo(SRWHelper *pHelper) {
     pIdx->offset = lseek(pHelper->files.nHeadF.fd, 0, SEEK_END);
     pIdx->uid = pHelper->tableInfo.uid;
     if (pIdx->offset < 0) return -1;
-    ASSERT(pIdx->offset >= tsizeof(pHelper->pCompIdx));
+    ASSERT(pIdx->offset >= TSDB_FILE_HEAD_SIZE);
 
     if (twrite(pHelper->files.nHeadF.fd, (void *)(pHelper->pCompInfo), pIdx->len) < pIdx->len) return -1;
   }
@@ -435,7 +438,8 @@ int tsdbWriteCompIdx(SRWHelper *pHelper) {
   SFile *pFile = &(pHelper->files.nHeadF);
   pFile->info.offset = offset;
 
-  void *buf = pHelper->blockBuffer;
+  // TODO: change the implementation of pHelper->pBuffer
+  void *buf = pHelper->pBuffer;
   for (uint32_t i = 0; i < pHelper->config.maxTables; i++) {
     SCompIdx *pCompIdx = pHelper->pCompIdx + i;
     if (pCompIdx->offset > 0) {
@@ -444,10 +448,10 @@ int tsdbWriteCompIdx(SRWHelper *pHelper) {
     }
   }
 
-  int tsize = (char *)buf - (char *)pHelper->blockBuffer + sizeof(TSCKSUM);
-  taosCalcChecksumAppend(0, (uint8_t *)pHelper->blockBuffer, tsize);
+  int tsize = (char *)buf - (char *)pHelper->pBuffer + sizeof(TSCKSUM);
+  taosCalcChecksumAppend(0, (uint8_t *)pHelper->pBuffer, tsize);
 
-  if (twrite(pHelper->files.nHeadF.fd, (void *)pHelper->blockBuffer, tsize) < tsize) return -1;
+  if (twrite(pHelper->files.nHeadF.fd, (void *)pHelper->pBuffer, tsize) < tsize) return -1;
   pFile->info.len = tsize;
   return 0;
 }
@@ -465,23 +469,23 @@ int tsdbLoadCompIdx(SRWHelper *pHelper, void *target) {
       ASSERT(pFile->info.offset > TSDB_FILE_HEAD_SIZE);
 
       if (lseek(fd, pFile->info.offset, SEEK_SET) < 0) return -1;
-      if (tread(fd, (void *)(pHelper->blockBuffer), pFile->info.len) < pFile->info.len)
+      if (tread(fd, (void *)(pHelper->pBuffer), pFile->info.len) < pFile->info.len)
         return -1;
-      if (!taosCheckChecksumWhole((uint8_t *)(pHelper->blockBuffer), pFile->info.len)) {
+      if (!taosCheckChecksumWhole((uint8_t *)(pHelper->pBuffer), pFile->info.len)) {
         // TODO: File is broken, try to deal with it
         return -1;
       }
 
       // Decode it
-      void *ptr = pHelper->blockBuffer;
-      while ((char *)ptr - (char *)pHelper->blockBuffer >= pFile->info.len - sizeof(TSCKSUM)) {
+      void *ptr = pHelper->pBuffer;
+      while ((char *)ptr - (char *)pHelper->pBuffer >= pFile->info.len - sizeof(TSCKSUM)) {
         uint32_t tid = 0;
         if ((ptr = taosDecodeVariant32(ptr, &tid)) == NULL) return -1;
         ASSERT(tid > 0 && tid < pHelper->config.maxTables);
 
         if ((ptr = tsdbDecodeSCompIdx(ptr, pHelper->pCompIdx + tid)) == NULL) return -1;
 
-        ASSERT((char *)ptr - (char *)pHelper->blockBuffer <= pFile->info.len - sizeof(TSCKSUM));
+        ASSERT((char *)ptr - (char *)pHelper->pBuffer <= pFile->info.len - sizeof(TSCKSUM));
       }
     }
 
@@ -626,9 +630,9 @@ static int tsdbCheckAndDecodeColumnData(SDataCol *pDataCol, char *content, int32
 static int tsdbLoadBlockDataImpl(SRWHelper *pHelper, SCompBlock *pCompBlock, SDataCols *pDataCols) {
   ASSERT(pCompBlock->numOfSubBlocks <= 1);
 
-  ASSERT(tsizeof(pHelper->blockBuffer) >= pCompBlock->len);
+  ASSERT(tsizeof(pHelper->pBuffer) >= pCompBlock->len);
 
-  SCompData *pCompData = (SCompData *)pHelper->blockBuffer;
+  SCompData *pCompData = (SCompData *)pHelper->pBuffer;
 
   int fd = (pCompBlock->last) ? pHelper->files.lastF.fd : pHelper->files.dataF.fd;
   if (lseek(fd, pCompBlock->offset, SEEK_SET) < 0) goto _err;
@@ -721,7 +725,7 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
   ASSERT(rowsToWrite > 0 && rowsToWrite <= pDataCols->numOfPoints &&
          rowsToWrite <= pHelper->config.maxRowsPerFileBlock);
 
-  SCompData *pCompData = (SCompData *)(pHelper->blockBuffer);
+  SCompData *pCompData = (SCompData *)(pHelper->pBuffer);
   int64_t offset = 0;
 
   offset = lseek(pFile->fd, 0, SEEK_END);
@@ -776,7 +780,7 @@ static int tsdbWriteBlockToFile(SRWHelper *pHelper, SFile *pFile, SDataCols *pDa
       }
 
       pCompCol->len = (*(tDataTypeDesc[pDataCol->type].compFunc))(
-          (char *)pDataCol->pData, tlen, rowsToWrite, tptr, tsizeof(pHelper->blockBuffer) - lsize,
+          (char *)pDataCol->pData, tlen, rowsToWrite, tptr, tsizeof(pHelper->pBuffer) - lsize,
           pHelper->config.compress, pHelper->compBuffer, tsizeof(pHelper->compBuffer));
     } else {
       pCompCol->len = tlen;
@@ -1242,11 +1246,8 @@ int tsdbUpdateFileHeader(SFile *pFile, uint32_t version) {
   void *pBuf = (void *)buf;
   pBuf = taosEncodeFixed32(pBuf, version);
   pBuf = tsdbEncodeSFileInfo(pBuf, &(pFile->info));
-  int tsize = (char *)pBuf - buf + sizeof(TSCKSUM);
 
-  ASSERT(tsize <= TSDB_FILE_HEAD_SIZE);
-
-  taosCalcChecksumAppend(0, (uint8_t *)buf, tsize);
+  taosCalcChecksumAppend(0, (uint8_t *)buf, TSDB_FILE_HEAD_SIZE);
 
   if (lseek(pFile->fd, 0, SEEK_SET) < 0) return -1;
   if (twrite(pFile->fd, (void *)buf, TSDB_FILE_HEAD_SIZE) < TSDB_FILE_HEAD_SIZE) return -1;