Date: Wed, 4 Feb 2004 19:07:15 +0300 From: Sergey 'DoubleF' Zaharchenko <doublef@tele-kom.ru> To: scott@sremick.net Cc: FreeBSD <freebsd-questions@freebsd.org> Subject: Re: "Cannot find file system superblock" error - how to recover? Message-ID: <20040204190715.7a8d1730@Hal.localdomain> In-Reply-To: <20040204143712.96647.qmail@web41110.mail.yahoo.com> References: <20040204172844.77123521@Hal.localdomain> <20040204143712.96647.qmail@web41110.mail.yahoo.com>
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--Signature=_Wed__4_Feb_2004_19_07_15_+0300_W=Fp61J.ygiouUYC Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 7bit On Wed, 4 Feb 2004 06:37:11 -0800 (PST) "Scott I. Remick" <scott@sremick.net> probably wrote: > --- Sergey 'DoubleF' Zaharchenko <doublef@tele-kom.ru> wrote: > > And /dev/ad2s1e? > > bash-2.05b# mount -r /dev/ad2s1e /data > mount: /dev/ad2s1e on /data: incorrect super block > bash-2.05b# fsck /dev/ad2s1e > ** /dev/ad2s1e > BAD SUPER BLOCK: MAGIC NUMBER WRONG > > LOOK FOR ALTERNATE SUPERBLOCKS? [yn] y > > USING ALTERNATE SUPERBLOCK AT 32 > ** Last Mounted on > ** Phase 1 - Check Blocks and Sizes > 416 BAD I=2 > 412 BAD I=3 > 424 BAD I=4 > 414 BAD I=4 > 417 BAD I=5 > INCORRECT BLOCK COUNT I=4257794 (8928 should be 9952) > CORRECT? [yn] > > Hmmm that looks more promising, although I'm not sure exactly what it's > trying to warn me about, or how bad things are from that, so I'm going to > leave it there for now. :) This really looks weird. The incorrect block counts seem somewhat suspicious. Try using fsck -n (answer `no'), and recording what else comes up. If you know what fsdb(8) is, it might be helpful (still with the -r (read-only) option, and the -d option as well). I don't, but I'm learning it intensively at the moment:). > And if I remember correctly, even though fsck has used an alternate > superblock to perform the repair process, it hasn't actually replaced the > master superblock with the alternate one, so I'd still need to fix that > manually somehow... correct? Yes, by means of dd. -- DoubleF The only possible interpretation of any research whatever in the `social sciences' is: some do, some don't. -- Ernest Rutherford --Signature=_Wed__4_Feb_2004_19_07_15_+0300_W=Fp61J.ygiouUYC Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (FreeBSD) iD8DBQFAIRjAwo7hT/9lVdwRAqqDAJ94ahUXtCd6H3dP4zMdTP4yvXPKHACfSqcU t8ffskimJf73Rs8/0qs5rlA= =qa3U -----END PGP SIGNATURE----- --Signature=_Wed__4_Feb_2004_19_07_15_+0300_W=Fp61J.ygiouUYC--
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