diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index 4a1ba9e391..b9db804986 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -752,6 +752,10 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
   if (cfgAddString(pCfg, "s3BucketName", tsS3BucketName, CFG_SCOPE_SERVER, CFG_DYN_NONE) != 0) return -1;
   if (cfgAddInt32(pCfg, "s3BlockSize", tsS3BlockSize, -1, 1024 * 1024, CFG_SCOPE_SERVER, CFG_DYN_ENT_SERVER) != 0)
     return -1;
+  if (tsS3BlockSize > -1 && tsS3BlockSize < 1024) {
+    uError("failed to config s3blocksize since value:%d. Valid range: -1 or [1024, 1024 * 1024]", tsS3BlockSize);
+    return -1;
+  }
   if (cfgAddInt32(pCfg, "s3BlockCacheSize", tsS3BlockCacheSize, 4, 1024 * 1024, CFG_SCOPE_SERVER, CFG_DYN_ENT_SERVER) !=
       0)
     return -1;
diff --git a/source/dnode/mnode/impl/src/mndDnode.c b/source/dnode/mnode/impl/src/mndDnode.c
index f4108b52c6..2f9b70853f 100644
--- a/source/dnode/mnode/impl/src/mndDnode.c
+++ b/source/dnode/mnode/impl/src/mndDnode.c
@@ -1316,8 +1316,8 @@ static int32_t mndProcessConfigDnodeReq(SRpcMsg *pReq) {
     int32_t code = mndMCfgGetValInt32(&cfgReq, optLen, &flag);
     if (code < 0) return code;
 
-    if (flag > 1024 * 1024 || (flag > -1 && flag < 4) || flag < -1) {
-      mError("dnode:%d, failed to config s3blocksize since value:%d. Valid range: -1 or [4, 1024 * 1024]",
+    if (flag > 1024 * 1024 || (flag > -1 && flag < 1024) || flag < -1) {
+      mError("dnode:%d, failed to config s3blocksize since value:%d. Valid range: -1 or [1024, 1024 * 1024]",
              cfgReq.dnodeId, flag);
       terrno = TSDB_CODE_INVALID_CFG;
       tFreeSMCfgDnodeReq(&cfgReq);