This write-up is designed to assist network administrators and technicians in troubleshooting and resolving the error when attempting to recover or upgrade a Huawei S7721U switch. Troubleshooting Guide: Huawei S7721U "Recovery Image Verify Failed" Overview Encountering an "Image verify failed" error during the recovery or upgrade process of a Huawei S7721U switch indicates that the system has detected an integrity issue with the firmware file being loaded. This is a critical safeguard designed to prevent the device from running corrupted or malicious software, which could render the switch inoperable ("bricked"). Petka+85+86+88+activation+thread+requirement+patched