diff --git a/lichee/brandy/u-boot-2014.07/board/sunxi/common/netease_ota.c b/lichee/brandy/u-boot-2014.07/board/sunxi/common/netease_ota.c
index 4e31cbad6..eeb88f575 100644
--- a/lichee/brandy/u-boot-2014.07/board/sunxi/common/netease_ota.c
+++ b/lichee/brandy/u-boot-2014.07/board/sunxi/common/netease_ota.c
@@ -194,7 +194,7 @@ static int ota_read_boot_image(void)
 {
 	int read_bytes = 0;
 	
-	if (fs_set_blk_dev("sunxi_flash", "boot", FS_TYPE_EXT))
+	if (fs_set_blk_dev("sunxi_flash", "0", FS_TYPE_EXT))
 	{
 		return -1;
 	}
@@ -210,7 +210,7 @@ static int ota_read_rootfs_image(void)
 {
 	int read_bytes = 0;
 	
-	if (fs_set_blk_dev("sunxi_flash", "rootfs", FS_TYPE_EXT))
+	if (fs_set_blk_dev("sunxi_flash", "0", FS_TYPE_EXT))
 	{
 		return -1;
 	}
@@ -221,6 +221,40 @@ static int ota_read_rootfs_image(void)
 
 	return read_bytes;
 }
+
+static int ota_calc_image_chksum(unsigned char* addr, int iSize, char* pChksm)
+{	
+	unsigned char md5sum[MD5_CHKSUM_LEN];
+
+	md5(addr, iSize, md5sum);
+	__bin2hex(pChksm, md5sum, MD5_CHKSUM_LEN);
+
+	return 0;
+}
+
+static int ota_upgrade_boot_image(void)
+{
+	char cmdBuf[128];
+	
+	memset(cmdBuf, 0, 128);
+	sprintf(cmdBuf, "sunxi_flash write 0x%x boot", READ_BOOT_ADDR);
+	run_command(cmdBuf, 0);
+
+	return 0;
+}
+
+static int ota_upgrade_rootfs_image(void)
+{
+	char cmdBuf[128];
+ 	
+	memset(cmdBuf, 0, 128);
+	sprintf(cmdBuf, "sunxi_flash write 0x%x rootfs", READ_ROOTFS_ADDR);
+	run_command(cmdBuf, 0);
+
+	return 0;
+}
+
+
 #if 0
 static int ota_read_file(const char* pDev, const char* pPart, const char* pFile)
 {
@@ -246,6 +280,7 @@ int do_ota(cmd_tbl_t *cmdtp, int flag, int argc,
 	static int read_boot_size = 0, read_rootfs_size = 0;
 	
 	printf("ota cmd: argc = %d\n", argc);
+	
 	if (argc < 2)
 		return CMD_RET_USAGE;
 
@@ -298,15 +333,20 @@ int do_ota(cmd_tbl_t *cmdtp, int flag, int argc,
 	}
 	else if(strncmp(argv[1], "upgrade", strlen("upgrade")) == 0)
 	{
-		int flag = 0;
+		int force = 0, flag = 0;
 		OTA_PARAMS otaInfo, upgInfo;
 		
 		if(argc == 2)
 		{
 			flag = (1 << 0) | (1 << 1);
-		}
+		}		
 		else
 		{
+			if(argc == 4)
+			{
+				force = simple_strtoul(argv[3], NULL, 16);
+			}
+			
 			if(strncmp(argv[2], "boot", strlen("boot")) == 0)
 			{
 				flag |= 1;
@@ -324,14 +364,61 @@ int do_ota(cmd_tbl_t *cmdtp, int flag, int argc,
 		}
 
 		if(flag == 0)
+		{
 			return CMD_RET_USAGE;
+		}
 
 		ota_read_params(&otaInfo);
 		memset(&upgInfo, 0, sizeof(OTA_PARAMS));
 		
 		if(flag & (1 << 0))
 		{
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+			
+			upgInfo.bootfileSize = ota_read_boot_image();
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+			ota_calc_image_chksum((unsigned char*)READ_BOOT_ADDR, 
+				upgInfo.bootfileSize, upgInfo.bootChksum);
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+			if(strcmp(upgInfo.bootChksum, otaInfo.bootChksum) != 0
+				|| upgInfo.bootfileSize != otaInfo.bootfileSize)
+			{
+				printf("Upgrade boot image maybe error:\n\t%s --> %s\n\t%u-%u\n",
+					upgInfo.bootChksum, otaInfo.bootChksum,
+					upgInfo.bootfileSize, otaInfo.bootfileSize);
 
+				if(force == 0)
+				{
+					return CMD_RET_FAILURE;
+				}
+			}
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+			ota_upgrade_boot_image();
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+		}
+
+		if(flag & (1 << 1))
+		{
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+			upgInfo.rootfsfileSize = ota_read_rootfs_image();
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+			ota_calc_image_chksum((unsigned char*)READ_ROOTFS_ADDR, 
+				upgInfo.rootfsfileSize, upgInfo.rootfsChksum);
+			printf("%s(%d)\n", __FUNCTION__, __LINE__);
+			if(strcmp(upgInfo.rootfsChksum, otaInfo.rootfsChksum) != 0
+				|| upgInfo.rootfsfileSize != otaInfo.rootfsfileSize)
+			{
+				printf("Upgrade rootfs image maybe error:\n\t%s --> %s\n\t%u-%u\n",
+					upgInfo.rootfsChksum, otaInfo.rootfsChksum,
+					upgInfo.rootfsfileSize, otaInfo.rootfsfileSize);
+
+				if(force == 0)
+				{
+					return CMD_RET_FAILURE;
+				}
+			}
+
+			ota_upgrade_rootfs_image();
 		}
 	}
 	else
@@ -344,15 +431,15 @@ int do_ota(cmd_tbl_t *cmdtp, int flag, int argc,
 }
 
 
-U_BOOT_CMD(ota, 4, 0, do_ota,
+U_BOOT_CMD(ota, 5, 0, do_ota,
 	   "netease OTA command:",
 	   "<command> <parmeters>\n"
 	   "	erase <partiton name>\n"
 	   "		- erase mtd partiton\n"
 	   "	read <boot/rootfs>\n"
 	   "		- read ota image form UDISK file system\n"	   
-	   "	upgrade <boot/rootfs/all>\n"
+	   "	upgrade <boot/rootfs/all> [0/1(skip verify chksum)]\n"
 	   "		- read ota image form UDISK file system and upgrade nand partiton\n"	   	   
 	   "	show_params\n"
-	   "		- show ota params information"
+	   "		- show ota params information\n"
 	   "    - *********************************************");
diff --git a/target/allwinner/mandolin-common/bin/u-boot-sun8iw15p1.bin b/target/allwinner/mandolin-common/bin/u-boot-sun8iw15p1.bin
index 27a7c39fc..37a2bd466 100755
Binary files a/target/allwinner/mandolin-common/bin/u-boot-sun8iw15p1.bin and b/target/allwinner/mandolin-common/bin/u-boot-sun8iw15p1.bin differ
diff --git a/target/allwinner/mandolin-pv1/configs/sys_partition.fex b/target/allwinner/mandolin-pv1/configs/sys_partition.fex
index f391b2eb4..0edd388d3 100755
--- a/target/allwinner/mandolin-pv1/configs/sys_partition.fex
+++ b/target/allwinner/mandolin-pv1/configs/sys_partition.fex
@@ -76,10 +76,10 @@ size = 512
 ;	downloadfile="recovery.fex"
 ;    user_type    = 0x8000
 
-;[partition]
-;    name         = misc
-;    size         = 1024
-;    user_type    = 0x8000
+[partition]
+    name         = misc
+    size         = 1024
+    user_type    = 0x8000
 
 [partition]
     name         = UDISK