4418 增量包ota升级

HI，
制作增量包升级，升级过程中失败。

contents of partition "/dev/block/platform/dw_mmc.0/by-num/p1" didn't match EMMC:/dev/block/platform/dw_mmc.0/by-num/p1:5273600:8b126c254c93b9f9eca09b69cdbb866b70b9b39c:18301148:c4d9cc76173eb694dbf4a84d7c50efa53f7fb259
file "EMMC:/dev/block/platform/dw_mmc.0/by-num/p1:5273600:8b126c254c93b9f9eca09b69cdbb866b70b9b39c:18301148:c4d9cc76173eb694dbf4a84d7c50efa53f7fb259" doesn't have any of expected sha1 sums; checking cache
failed to stat "/cache/saved.file": No such file or directory
failed to load cache file
script aborted: "EMMC:/dev/block/platform/dw_mmc.0/by-num/p1:5273600:8b126c254c93b9f9eca09b69cdbb866b70b9b39c:18301148:c4d9cc76173eb694dbf4a84d7c50efa53f7fb259" has unexpected contents.
"EMMC:/dev/block/platform/dw_mmc.0/by-num/p1:5273600:8b126c254c93b9f9eca09b69cdbb866b70b9b39c:18301148:c4d9cc76173eb694dbf4a84d7c50efa53f7fb259" has unexpected contents.
E:Error in /cache/update.zip
(Status 7)

Installation aborted.
OTA failed! Please power off the device to keep it in this state and file a bug report!

您好：
    OTA升级是您自己移植的吗，具体如何操作的，请说明一下    此外负责您的销售是谁，请说明一下