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Message-ID: <m2eivm599b.fsf@vador.mandriva.com> Date: Tue, 21 Apr 2009 17:14:40 +0200 From: Thierry Vignaud <tvignaud@...driva.com> To: Jeremy Sanders <jss@....cam.ac.uk> Cc: linux-ext4@...r.kernel.org Subject: Re: fsck.ext4: Group descriptors look bad... trying backup blocks... Jeremy Sanders <jss@....cam.ac.uk> writes: > However, the system seems to mostly work, so I recreated the ext4 device, > I've just run my backup script again and fsck'd the device. It seems the > problem is reproducible with the new kernel: > > [root@...ck2 ~]# fsck /dev/md0 > fsck 1.41.4 (27-Jan-2009) > e2fsck 1.41.4 (27-Jan-2009) > fsck.ext4: Group descriptors look bad... trying backup blocks... > Group descriptor 0 checksum is invalid. Fix<y>? > > Looks like there's a real problem in ext4 causing this under certain > circumstances (unless an obscure hardware error is somehow giving the same > problem). > > To cause this, all I did was rsync a set of directories to the disk. No hard > link trees were created. For the record, I reproduced this bug with 2.6.30-rc2-git6 on a new 1.5Tb disk. Formated as ext4, using relatime, copied 20Gb. On reboot, I got such errors. The hd was partitionned (all ext4) as: / (5Gb) | /usr (20Gb) | /pub (1.5Tb) The smaller system fses didn't saw those errors. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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