On Mon, Jan 09, 2012 at 04:21:31PM +0100, Niels de Carpentier wrote: > > The plan that occurs to me is to make a snapshot of the system in the > > state that I want to always boot. Then, I would rewrite the init > > script in the initrd to (a) delete any old tmp copy of the snapshot; > > (b) copy the static snapshot to a tmp copy; (c) mount the tmp copy. > > > > That's a little harder than I was hoping to work -- is there an easier > > way to get this functionality? > > I would just create a filesystem with the static content, and on boot do: > > mount fs > delete snapshots > create snapshot > unmount fs and mount snapshot. > > I'm not sure if you can snapshot a snapshot, otherwise you could start > with a snapshot as well. (Just be sure not to delete it)
Yes, you can make snapshots of snapshots. A btrfs snapshot is a first-class citizen -- there's no real distinction between the original subvolume and a snapshot of it. Hugo -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- 2 + 2 = 5, for sufficiently large values of 2. ---
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