Dockers Disappeared after replacing Cache drive?

Here is the post I put in the lounge (was not sure where to put this). This has more info:

This procedure assumes that there are at least some dockers and/or VMs related files on the cache disk, some of these steps are unnecessary if there aren't.

Stop all running Dockers/VMs

Settings -> VM Manager: disable VMs and click apply

Settings -> Docker: disable Docker and click apply

For v6.11.5 or older: Click on Shares and change to "Yes" all cache shares with "Use cache disk:" set to "Only" or "Prefer"

For v6.12.0 or newer: Click on all shares that are using the pool you want to empty and change them to have the pool as primary storage, array as secondary storage and mover action set to move from pool to array

Check that there's enough free space on the array and invoke the mover by clicking "Move Now" on the Main page

When the mover finishes check that your cache is empty (any files on the cache root will not be moved as they are not part of any share)

Stop array, replace cache device, assign it, start array and format new cache device (if needed), check that it's using the filesystem you want

For v6.11.5 or older: Click on Shares and change to "Prefer" all shares that you want moved back to cache

For v6.12.0 or newer: Click on Shares and change the mover action to move from array to pool for all shares that you want moved back to cache

On the Main page click "Move Now"

When the mover finishes re-enable Docker and VMs