Date: Sat, 26 May 2007 21:43:42 +0200 From: Roland Smith <rsmith@xs4all.nl> To: Svein Halvor Halvorsen <svein.h@lvor.halvorsen.cc> Cc: questions@freebsd.org Subject: Re: Restore UFS snapshot Message-ID: <20070526194342.GA37130@slackbox.xs4all.nl> In-Reply-To: <465884E3.5000500@lvor.halvorsen.cc> References: <465864F4.7060500@lvor.halvorsen.cc> <20070526180336.GB34660@slackbox.xs4all.nl> <465884E3.5000500@lvor.halvorsen.cc>
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--tThc/1wpZn/ma/RB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, May 26, 2007 at 09:05:07PM +0200, Svein Halvor Halvorsen wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 >=20 > Roland Smith wrote: > >> Is it possible to rollback a file system snapshot, i.e. restore the > >> file system to the state it was in at the time a mksnap_ffs command > >> was issued? > >=20 > > You can mount the snapshot, and then copy the files back to the origina= l fs. > > Note that cp can preserve flags, but not ACLs AFAIK. >=20 > Yes, I know that this is possible. However, it's a lot of work. Huh?=20 Suppose you did 'mksnap_ffs /usr /usr/.snap/20070526' Then all you have to is something like: # mdconfig -a -t vnode -f /usr/.snap/20070526 -u 0 # mount /dev/md0 /mnt/snapshot # cd /usr # tar cf - /mnt/snapshot/* |tar xpf - # umount /mnt/snapshot # mdconfig -d -u 0 How much easier could it be? You could easily create a script for this as well. > There should be some straightforward way of rolling back to a > snapshot, since the files and all the file system structure are > already there. Also, there might not be room on the disk for it. Snapshots take up room as well. Roland --=20 R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) --tThc/1wpZn/ma/RB Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.3 (FreeBSD) iD8DBQFGWI3uEnfvsMMhpyURAnx/AKCpTyTBWzIQmtgqz8kGkKJ8Se8NRACfT74z y+Q9D3EyZWB8BmjL9V0V3cU= =eTWR -----END PGP SIGNATURE----- --tThc/1wpZn/ma/RB--
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