I am having a weird issue. I added a new pool for VMs yesterday and it uses a small SSD. Everything went fine, LUKS was setup nicely and after boot the pool works fine.
I have had a VM running in that pool for a while and twice now, suddenly, the pool becomes unavailable. I now checked and looks like the entire SSD is missing from the list of block devices. Does anyone have any idea why this could happen? A reboot makes the pool available again.