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

To: Martin Michlmayr <tbm@xxxxxxxxxx>
Subject: Re: XFS filesystem corruption on the arm(el) architecture
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Sun, 19 Oct 2008 12:48:30 +1100
Cc: Eric Sandeen <sandeen@xxxxxxxxxxx>, Tobias Frost <tobi@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, debian-arm@xxxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
In-reply-to: <20081018085752.GS25834@xxxxxxxxxxxxxxxxxxxxxx>
Mail-followup-to: Martin Michlmayr <tbm@xxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>, Tobias Frost <tobi@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, debian-arm@xxxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
References: <1222893502.5020.40.camel@moria> <20081002004556.GB30001@disturbed> <48E4213E.9090508@xxxxxxxxxxx> <20081016212500.GA27228@xxxxxxxxxxxxxxxxxxxxxx> <48F7BC9F.4080909@xxxxxxxxxxx> <20081017070109.GA30726@xxxxxxxxxxxxxxxxxxxxxx> <48F89E0F.6030307@xxxxxxxxxxx> <20081018085752.GS25834@xxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Sat, Oct 18, 2008 at 10:57:56AM +0200, Martin Michlmayr wrote:
> * Eric Sandeen <sandeen@xxxxxxxxxxx> [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@xxxxxxxxxxxxx

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