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

To: Eric Sandeen <sandeen@xxxxxxxxxxx>, Tobias Frost <tobi@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, debian-arm@xxxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
Subject: Re: XFS filesystem corruption on the arm(el) architecture
From: Martin Michlmayr <tbm@xxxxxxxxxx>
Date: Sun, 19 Oct 2008 07:12:47 +0200
In-reply-to: <20081019014830.GI31761@disturbed>
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> <20081019014830.GI31761@disturbed>
User-agent: Mutt/1.5.18 (2008-05-17)
* Dave Chinner <david@xxxxxxxxxxxxx> [2008-10-19 12:48]:
> 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?

mdebian:~# mkfs.xfs -f /dev/sda5
meta-data=/dev/sda5              isize=256    agcount=4, agsize=94380
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=377519,
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks,
realtime =none                   extsz=4096   blocks=0, rtextents=0
debian:~# mount -t xfs /dev/sda5 /mnt
debian:~# cp /usr/bin/* /mnt/
debian:~# umount /mnt
debian:~# mount -t xfs /dev/sda5 /mnt
mount: /dev/sda5: can't read superblock
debian:~# xfs_logprint -t /dev/sda5
    data device: 0x805
    log device: 0x805 daddr: 1510112 length: 20480

XFS: Log inconsistent (didn't find previous header)
XFS: empty log check failed
xfs_logprint: failed to find head and tail, error: 5

Martin Michlmayr

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