linux-kernel - Re: XFS filesystem corruption on the arm(el) architecture

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Message-ID: <20081019014830.GI31761@disturbed>
Date:	Sun, 19 Oct 2008 12:48:30 +1100
From:	Dave Chinner <david@...morbit.com>
To:	Martin Michlmayr <tbm@...ius.com>
Cc:	Eric Sandeen <sandeen@...deen.net>,
	Tobias Frost <tobi@...dtobi.de>, linux-kernel@...r.kernel.org,
	debian-arm@...ts.debian.org, xfs@....sgi.com
Subject: Re: XFS filesystem corruption on the arm(el) architecture

On Sat, Oct 18, 2008 at 10:57:56AM +0200, Martin Michlmayr wrote:
> * Eric Sandeen <sandeen@...deen.net> [2008-10-17 09:15]:
> > If you unmount & remount, does the ls work then?
> 
> I cannot even mount it:
> 
> debian:~# mkfs.xfs -f /dev/sda5
> meta-data=/dev/sda5              isize=256    agcount=4, agsize=94380 blks
>          =                       sectsz=512   attr=2
> data     =                       bsize=4096   blocks=377519, imaxpct=25
>          =                       sunit=0      swidth=0 blks
> naming   =version 2              bsize=4096
> log      =internal log           bsize=4096   blocks=2560, version=2
>          =                       sectsz=512   sunit=0 blks, lazy-count=0
> realtime =none                   extsz=4096   blocks=0, rtextents=0
> debian:~# mount /dev/sda5 /mnt
> [42949596.920000] XFS mounting filesystem sda5
> debian:~# cp /usr/bin/* /mnt/
> debian:~# umount /mnt
> debian:~# mount -t xfs /dev/sda5 /mnt
> [42949612.290000] XFS mounting filesystem sda5
> [42949612.460000] Starting XFS recovery on filesystem: sda5 (logdev: internal)
> [42949612.480000] XFS: xlog_recover_process_data: bad flag
> [42949612.500000] XFS: log mount/recovery failed: error 5
> [42949612.500000] XFS: log mount failed
> mount: /dev/sda5: can't read superblock
> debian:~#

That's the log replay indicating that there's a bad transaction
header in the log. Very strange - it shoul dbe a clean log. What
does xfs_logprint -t /dev/sda5 tell you about the transactions
in the log?

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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