Date: Sat, 26 May 2007 15:11:17 -0700 From: "pete wright" <nomadlogic@gmail.com> To: "Svein Halvor Halvorsen" <svein.h@lvor.halvorsen.cc> Cc: Roland Smith <rsmith@xs4all.nl>, questions@freebsd.org Subject: Re: Restore UFS snapshot Message-ID: <57d710000705261511t3ff03968wef2ae785ad2d63bc@mail.gmail.com> In-Reply-To: <4658AFC3.30803@lvor.halvorsen.cc> References: <465864F4.7060500@lvor.halvorsen.cc> <20070526180336.GB34660@slackbox.xs4all.nl> <465884E3.5000500@lvor.halvorsen.cc> <20070526194342.GA37130@slackbox.xs4all.nl> <465898D5.7080607@lvor.halvorsen.cc> <57d710000705261444j48c515b6o4666ac2f168f7725@mail.gmail.com> <4658AFC3.30803@lvor.halvorsen.cc>
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On 5/26/07, Svein Halvor Halvorsen <svein.h@lvor.halvorsen.cc> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > pete wright wrote: > > hmm...i'm still a little confused as to where you are going. there > > are three main way's i've used snapshot's in large (~1PB) > > environments, two of which are applicable to you i believe: > > *snip dump/restore plug* > > > Yes, I understand how I could use dump/restore. But forget about all > this. Forget about my reasons for wanting it. > > All I want to know is whether or not there exists a tool that will > let me rollback a snapshot without mounting it, dumping it, or > anything like that. Just by flipping some bits in the superblock, or > some other small changes to an (unmounted) file system. Something > really easy. No extra disk, no excessive copying, no nothing. Just a > simple > > # umount > # snap_rollback > *wait 10 seconds* > # mount > > .. and I'm set. > > I believe it should be possible. And if nothing like that exists, it > should be made. I could look into it, but I would have to learn a > lot more about the inner workings of the file system first. > > not that i know of, and IMHO for good reason. i would not trust anything of that nature with data that i deemed important enough to snap shot in the first place. -pete -- ~~o0OO0o~~ Pete Wright www.nycbug.org NYC's *BSD User Group
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