• First, stop your current array
• Go to settings > docker and disable
• Go to settings > VM Manager and disable
• Add your old cache drives to the array as they were
• start the array
IMPORTANT: do not enable dockers and VMs yet
• Go to the array with a decent file manager (I rather recommend Midnight Commander, aka mc from the command line, but it's up to you) and delete the newly-created appdata and other folders which will have been created on the array as there was no cache
• Once this is done, you can enable dockers and Vms, but make sure you select the advanced settings and point to the files which should now be back on your cache drive
I hope I made things clear enough. Let me know if not
