When the storage device is upgraded in a project, controller A prompts cf_data/image is busy, causing the upgrade to fail.
This operation would interrupt the services, please operate with caution and back up data in advance.
Upgrade controller B after controller A is removed manually. When the upgrade completes, reinsert controller A to upgrade it automatically to the version of controller B.
Make sure the cf_data/image directory is not being accessed during the upgrade. If it is being accessed, please exit it normally and then continue to upgrade.