diff --git a/device/config/chips/v851s3/configs/fastboot_sl100_front/linux/sys_partition_nor.fex b/device/config/chips/v851s3/configs/fastboot_sl100_front/linux/sys_partition_nor.fex
index 429b0d51f..fc4232765 100755
--- a/device/config/chips/v851s3/configs/fastboot_sl100_front/linux/sys_partition_nor.fex
+++ b/device/config/chips/v851s3/configs/fastboot_sl100_front/linux/sys_partition_nor.fex
@@ -53,13 +53,13 @@ size = 16
 
 [partition]
     name         = rootfs
-    size         = 4864
+    size         = 14336
     downloadfile = "rootfs.fex"
     user_type    = 0x8000
 
 [partition]
     name         = extend
-    size         = 11264
+    size         = 2048
     downloadfile = "usr.fex"
     user_type    = 0x8000