Unrelated to the corruption
Your "app" share where you have your docker.img and default appdata location configured, has some files on disk3.
Ideally, these would all be on fast pool such as cache, with nothing on the array, so Dockers can perform better, and so array disks can spin down since these files are always open.
Instead of reconfiguring things so Mover will move those for you, it's probably simpler to clean this up yourself with Dynamix File Manager plugin. Nothing can move or delete open files so you will have to disable Docker in Settings.