Huawei S7721u Recovery Image Verify Failed Link -

When you encounter the "Recovery Image Verify Failed" error on a Huawei S7700 series switch (specifically the S7712 or S7703/06 models using the SRU components like the S7721U), it indicates a critical mismatch or corruption in the system software. This error typically occurs during a reboot or a version upgrade.

Last resort: If you absolutely cannot find the file, extract the board (model BC71S7721) and replace the BIOS chip with a pre-flashed unit from eBay (search: "Huawei S7721U BIOS chip preprogrammed" – sellers exist for exactly this reason). huawei s7721u recovery image verify failed link

If the error persists across multiple different software versions: The Flash Memory on the S7721U board may be failing. When you encounter the "Recovery Image Verify Failed"

Invalid Digital Signature: The system software version may not match the required digital signature for that specific hardware/BootROM version. Boot to UEFI Shell (Press F12 at splash

Boot to UEFI Shell (Press F12 at splash screen, select UEFI Internal Shell).
Identify the Recovery Partition:
```
Shell> map -r
Shell> fs0:
fs0:\> ls
```
Look for a partition labeled RECOVERY (usually fs1: or fs2:).
Force Write (Disable Verification for this session):
```
Shell> setvar RecoverySignatureCheck -nv -bs = 0x00
Shell> load fs0:\EFI\Huawei\FlashRecovery.efi -force
```
(Note: The exact EFI loader name varies. Use ls fs0:\EFI\Huawei\ to find it.)

Write the new image using the vendor tool (not dd inside UEFI):

Shell> HuaweiFlash.efi -i usb0:\recovery_v2.3.bin -t recovery -skipverify

Run NAND bad block scan: <BootROM> nand scrub
Check power supply stability (erratic voltage can corrupt writes).
Consider replacing the CompactFlash or onboard flash module (if socketed).

Requirements:

or is plugged into a power source before attempting these fixes.