How do you determine if a Proxmox linked clone is attached to a disk?

Sometimes you want to get rid of a VM template. In doing so, you might encounter the following issue:

TASK ERROR: base volume 'nas02:base-9403-disk-0' is still in use by linked cloned

In the case where we have a template with 9403, the syntax is:

grep ':base-9403-disk-[0-9]*/' /etc/pve/qemu-server/*.conf

/etc/pve/qemu-server/144.conf:scsi0: nas02:base-9403-disk-0/vm-144-disk-0,cache=none,size=20G

If your objective is to delete the template, and it’s ZFS, you might have an issue.

LVM-thin is an exception here, because AFAIK the linked clones there are independent of the parent volume.

See post about this here by Fiona:

• https://forum.proxmox.com/threads/how-to-know-linked-clone-or-used-by-another-vm-lxc-before-remove-it.115562/

Question

Is there a way to unlink a clone?

Right click, create clone

Reference: https://forum.proxmox.com/threads/convert-linked-clone-to-full-clone.71925/