Disclaimer: I'm a bumbling idiot who does this type of thing as a hobby. Add nightly or weekly offline backups and you should be good to go. And by offline, I

Disclaimer: I'm a bumbling idiot who does this type of thing as a hobby. Add nightly or weekly offline backups and you should be good to go. And by offline, I mean physically connecting a storage device, making the backup (preferrably via an automated script), and then disconnecting the device and storing it elsewhere in a safe place. In your scenario, I understand that the original physical host where you're making a backup of a VM has no redundancy or data integrity guarantees? I'd just like to point out that backups are good, but if all you have are backups of the same corrupted data, then they are pretty much useless. My approach is to have redundancy and data integrity guarantees (ZFS mirror) at the source and have offline backups on external hard drives. The original data is likely to be OK, and well, if I need to recover from a backup, I'll be happy enough with what I have there anyway.