@olivierlambert Not a home lab unfortunately, an inherited set up.

But thanks for the link, still trying to reverse engineer all of this.

I'm running XCP and I have XOA pointing to FreeNAS via 2 x iSCSI and had issues with backups due to long snapshot chains. The offending VMs were copied and moved to iSCSI 1. What I'm left with now is over 300 base copies that are not attached to anything.

I have no idea how to get rid of these and they cannot be destroyed from XOA.
Any advice or pointers on how to get rid of these would be greatly appreciated.
We're running XCP.