Huawei S7721u Recovery Image Verify Failed Repack

Copy a known working, valid .cc or recovery system image to a compatible physical storage card using an external computer.

Once you complete your modifications, you must repack the image. If you run a standard build command, the device bootloader will trigger a signature block. You must repack the partition using precise block parameters. Step 1: Repack the Base Partition Run the repack utility from the AIK directory: ./repackimg.sh Use code with caution.

The Huawei S7721U typically belongs to Huawei’s access network product line (e.g., SmartAX MA56xx series or an ONT). It uses a proprietary bootloader and a secure recovery system that validates firmware images before flashing.

Connect to a stable Wi-Fi network; the device will automatically download and install the verified stock firmware from Huawei's official servers The "dload" Method (Manual SD Flash)

# Boot the Huawei S7-721u into Fastboot mode (Power + Volume Down) fastboot devices # Flash the custom repacked recovery directly to bypass the UPDATE.APP verification checks fastboot flash recovery RECOVERY.img # Clear the cached validation state and restart your tablet fastboot flash boot BOOT.img fastboot reboot Use code with caution. Verification and Troubleshooting Framework Error Symptom Probable Cause Corrective Action Incorrect padding size on the repacked .img container.

The fastest and safest approach to clear the boot loop is to replace the faulty repacked file with an untampered, official image directly via the basic BootROM menu.

How to Fix Huawei S7721U "Recovery Image Verify Failed" & Repack Errors

Run:

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Unexpected Reboot of a Fixed Switch - Huawei Support