On 3/2/25 2:23 PM, Anssi Saari wrote:
So you actually back up the hibernated / partition? Is that really a
sound backup strategy?
It is effectively like yanking the power cord and then taking a backup.
(Effects of the voltage dropping on the storage controller/disk are
another matter, but in that regard hibernation is *safer* than yanking
the power.) Assuming the filesystem can recover from a power cut, it
can recover from this situation as well.
Indeed, I use this approach to backup production databases. Databases
are, in many ways, like filesystems of their own, and any database with
some kind of a journal can be backed up this way provided you have a way
to create an atomic snapshot of the filesystem (LVM snapshots, btrfs
snapshots, etc.).
Anything that semantically looks identical to "the machine suddenly
powered off" is safe provided the data structure being backed up is
designed to recover from that scenario. ext4 with a journal certainly
qualifies.
--
Chris Howie
http://www.chrishowie.com
http://en.wikipedia.org/wiki/User:Crazycomputers
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