Date: Wed, 19 Aug 2009 18:09:57 +0200 From: Roland Smith <rsmith@xs4all.nl> To: Erik Norgaard <norgaard@locolomo.org> Cc: questions@freebsd.org Subject: Re: Recovering files after a crash Message-ID: <20090819160956.GA71105@slackbox.xs4all.nl> In-Reply-To: <4A8BB0E4.2020806@locolomo.org> References: <4A8A5887.1080304@locolomo.org> <20090818171528.GA35403@slackbox.xs4all.nl> <4A8BB0E4.2020806@locolomo.org>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --] On Wed, Aug 19, 2009 at 09:59:32AM +0200, Erik Norgaard wrote: > Thanks, I couldn't decipher these GEOM_LABEL messages, nice to know that > I can stop worrying. But for future incidents, the second question remains: > > 1. How do I best protect my system from disk errors in case of a crash? One word: _backups_! Multiple solutions are possible. You can have two disks in RAID1 (mirroring, which is like instantaneous backup). Or you can have two disks where the second is kept up-to-date by rsync running from cron (this also gives you a limited undo functionality if you accidentaly delete a file). Ar you can back up to a NAS, USB connected disk or to tape. > I have a headless system with no spare head to attach and doing > single-user blind-folded is further complicated by the fact that I'm not > native to the US keyboard layout, so my top priority is that it boots. If you can connect it to another system (that has a monitor) via a serial null-modem cable and you enable the serial console (see the Handbook), you can watch the boot process from the other system. If you don't have anothe machine closeby, you should get a network-accessible KVM switch with serial connectors. [maybe something like this: http://www.knuerr.com/web/en/products/kvm/kvm-switch-dominion-ksx.html] With such a switch and the serial console you should be able to watch the boot of the machine remotely. > 2. When you have lost inodes or similar errors and stuff ends up in > lost+found, how do you figure out what it was and recover the lost files? You have to look at the contents of the files in lost&found. Usually it is easier to restore from backup. > Is there a FBSD crash guide? Not that I know of. The only guidance that really matter would be "make sure you have backed up critical data". No need for elaborate guides. :-) Roland -- 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) [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) iEYEARECAAYFAkqMI9QACgkQEnfvsMMhpyWtaACgoSa/JaQNFugyDRP2vT3un57X CrkAnRwu4/bwsiMwB3xZ7TmZ4ItJ/ywR =oRna -----END PGP SIGNATURE-----help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20090819160956.GA71105>