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Re: xfs_repair refuses to run on cleanly mountable partition

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: xfs_repair refuses to run on cleanly mountable partition
From: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>
Date: Mon, 7 Oct 2013 17:40:44 +0200
Cc: xfs-oss <xfs@xxxxxxxxxxx>
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In-reply-to: <5252D51B.7010503@xxxxxxxxxxx>
References: <20131007151637.GA280@x4> <5252D194.1010609@xxxxxxxxxxx> <20131007152910.GB280@x4> <5252D51B.7010503@xxxxxxxxxxx>
On 2013.10.07 at 10:36 -0500, Eric Sandeen wrote:
> On 10/7/13 10:29 AM, Markus Trippelsdorf wrote:
> > On 2013.10.07 at 10:21 -0500, Eric Sandeen wrote:
> >> On 10/7/13 10:16 AM, Markus Trippelsdorf wrote:
> >>> x4 ~ # xfs_repair -V
> >>> xfs_repair version 3.2.0-alpha1
> >>>
> >>> x4 ~ # mount -o logbsize=256k /dev/sdc1 /mnt
> >>> ...
> >>> [ 6419.592649] XFS (sdc1): Mounting Filesystem
> >>> [ 6419.642480] XFS (sdc1): Ending clean mount
> >>>
> >>> x4 ~ # xfs_info /dev/sdc1
> >>> meta-data=/dev/sdc1              isize=256    agcount=4, agsize=61047552 
> >>> blks
> >>>          =                       sectsz=4096  attr=2, projid32bit=0
> >>>          =                       crc=0
> >>> data     =                       bsize=4096   blocks=244190208, imaxpct=25
> >>>          =                       sunit=0      swidth=0 blks
> >>> naming   =version 2              bsize=4096   ascii-ci=0
> >>> log      =internal               bsize=4096   blocks=119233, version=2
> >>>          =                       sectsz=4096  sunit=1 blks, lazy-count=1
> >>> realtime =none                   extsz=4096   blocks=0, rtextents=0
> >>>
> >>> x4 ~ # umount /mnt
> >>>
> >>> x4 ~ # xfs_repair /dev/sdc1
> >>> Phase 1 - find and verify superblock...
> >>> Phase 2 - using internal log
> >>>         - zero log...
> >>> ERROR: The filesystem has valuable metadata changes in a log which needs 
> >>> to
> >>> be replayed.  Mount the filesystem to replay the log, and unmount it 
> >>> before
> >>> re-running xfs_repair.  If you are unable to mount the filesystem, then 
> >>> use
> >>> the -L option to destroy the log and attempt a repair.
> >>> Note that destroying the log may cause corruption -- please attempt a 
> >>> mount
> >>> of the filesystem before doing this.
> >>
> >> What kernel are you running?  Does older xfs_repair behave differently?
> >> (use xfs_repair -n if you test an old xfsprogs, to preserve this state
> >> for debugging...)
> > 
> > I'm running the latest git kernel 3.12.0-rc4. 
> > "xfs_repair -n" runs fine even with xfsprogs 3.2.0-alpha1...
> > 
> >> Perhaps copying out or dumping the log w/ xfs_logprint would also help, 
> >> maybe start with:
> >>
> >> # xfs_logprint -t /dev/sdc1
> > xfs_logprint:
> >     data device: 0x821
> >     log device: 0x821 daddr: 976760888 length: 953864
> > 
> >     log tail: 53376 head: 53376 state: <CLEAN>
> 
> Funky.
> 
> How about an xfs_repair -v (for verbose).
...
        - zero log..
zero_log: head block 53048 tail block 49064
ERROR: The filesystem has valuable metadata changes in a log which needs to
...

-- 
Markus

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