Date: Sat, 11 Jul 2009 17:47:24 +0200 From: Bernd Walter <ticso@cicely7.cicely.de> To: Stefan Bethke <stb@lassitu.de> Cc: FreeBSD Current <freebsd-current@freebsd.org>, ticso@cicely.de Subject: Re: Unrecoverable UFS error but only with gmirror Message-ID: <20090711154724.GC76026@cicely7.cicely.de> In-Reply-To: <2AAF9560-BD5C-4BB7-9AA6-D8F10853CF2D@lassitu.de> References: <7C636440-4F5D-47B0-BE20-D417B054B1F6@lassitu.de> <20090711133030.GA76026@cicely7.cicely.de> <2AAF9560-BD5C-4BB7-9AA6-D8F10853CF2D@lassitu.de>
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On Sat, Jul 11, 2009 at 03:39:37PM +0200, Stefan Bethke wrote: > Am 11.07.2009 um 15:30 schrieb Bernd Walter: > > >On Sat, Jul 11, 2009 at 02:54:01PM +0200, Stefan Bethke wrote: > >>gmirror and/or ufs got into an odd state after a panic, where fsck > >>could not fix errors on the mirror device, but each member filesystem > >>was fine. Even after destroying the mirror, fixing all three member > >>file systems with fsck, and recreating the mirror with just a single > >>member fsck found the same errors on the mirror device. > > > >You've created the partitions without mirror? > >The member drives are one block larger than the mirrored and if the > >filesystem tries to use it under mirror it will fail. > >The easiest way to avoid is to create the gmirror and then setup > >your partitions on the mirror. > > No, I've newfs'ed the mirror device, not the disk partitions, so that > shouldn't be the problem. Unless gmirror fails to subtract the > metadata sector from the mirror device. I see - normally this should work fine then. But you get read problem and I asume you wouldn't ask if you also see hardware errors. So this is likely accessing a block, which is not part of the volume. Of course a bad UFS metadata can point to non existing data as well. I would still verify the sizes - is the block far out of volume range, or just a bit? Is the underlying paritioning Ok? -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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