On Mon, May 11, 2026 at 11:42:46AM -0400, Stefan Monnier wrote: > Arno Lehmann [2026-05-11 14:13:42] wrote: > > Because, to get back to the original topic -- an LVM snapshot is *not* an > > exact copy of the original volume, and of course much less so of the > > partition, disk, or anything else. So a block level dump of an LVM snapshot > > is not something you can just dump back as a disaster recovery step. > > Interesting. Could you clarify what you mean here? > I've used LVM snapshots in the past then `ddrescue`d the data > back&forth to a target LVM volume and that seemed to work well (and > I assumed it's supposed to work well).
Oh, that's surprising to me, too: I'd expected /dev/mapper/volgroup/snapshot (or wherever your snapshot lives) to behave like a normal block device. Perhaps I'm being too naïve (again)? Cheers -- t
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