--- ./source/private_module/fs_ctrl/master_agent/obj_space_util_fs_intf.c	2018-04-14 08:37:28.000000000 +0000
+++ ./source/private_module/fs_ctrl/master_agent/obj_space_util_fs_intf.c.hotpatch	2019-07-12 10:10:34.000000000 +0000
@@ -735,7 +735,7 @@
         return RETURN_OK;
     }
 
-    if (spaceGlobalCfg->maxPrereadNum < PAL_PREREAD_CFG_MIN_VALUE || 
+    if (spaceGlobalCfg->maxPrereadNum < 1 || 
         spaceGlobalCfg->maxPrereadNum > PAL_PREREAD_CFG_MAX_VALUE)
     {
         DBG_LogError(DBG_LOGID_NEW, "SPACE_UTIL: Invalid max preread num(%u).", spaceGlobalCfg->maxPrereadNum);
