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How should I do backups?
(sh.itjust.works)
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this post was submitted on 30 Mar 2024
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do you use a COW fs?, using snapshots could be helpful
Just want to note here:
Snapshots are NOT a backup.
While btrfs is quite stable corruption/disk failure can always happen. Bcachefs had a little opsie daisy that caused some FS level corruption. Snapshots won't help in this case.
Snapshots are great for quick restoration on user error.
bcachefs is very early tho, and the corruption was reversible becuase of the COW nature, but i agree
Helpful yes, but far from enough. It only helps in some scenarios (like accidental deletes, malware), but not in many others (filesystem corruption, multiple disks dying at once due to e.g. lightning, a bad PSU or a fire).
Offsite backup is a must for data you want to keep.