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Re: Weird XFS Corruption Error

To: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Subject: Re: Weird XFS Corruption Error
From: Sascha Askani <saskani@xxxxxxxxx>
Date: Fri, 24 Jan 2014 09:08:32 +0100
Cc: xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20140123151943.281baa04@xxxxxxxxxxxxxxxxxxxx>
References: <CDBC891F-BCF6-4B9B-ADDB-9E143973D188@xxxxxxxxx> <20140123151943.281baa04@xxxxxxxxxxxxxxxxxxxx>
Hi Emmanuel,

thanks for your reply, sorry for the delayed answer...

Am 23.01.2014 um 15:19 schrieb Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>:

> Le Wed, 22 Jan 2014 17:09:10 +0100
> Sascha Askani <saskani@xxxxxxxxx> écrivait:
> 
>> Internal error xfs_bmbt_read_verify at line 789 
> ...
>> metadata I/O error: block 0x1f0 ("xfs_trans_read_buf_map") error 117
>> numblks 8
> 
> 
> A quick glance at the source code seems to indicate that there was an
> actual CRC error (on disk) at this point, so that could be a RAID
> problem;

(Un)fortunately, I don’t see any kind of controller errors, but I definitely 
second your opinion

> 
> OTOH it looks really similar to an older bug :
> 
> http://oss.sgi.com/archives/xfs/2013-02/msg00482.html
> 
> AFAIK this one could be related to the current Ubuntu LTS lvm stack...
> We need Dave's advice on this one.
> 
> Was there nothing in the xfs_repair output? nothing in lost+found
> either?

xfs_repair output (which I unfortunately do not have) was sparse (ignoring the 
many dots it printed after having failed to find the primary superblock), 
basically it removed invalid references. lost+found contains 1 directory (which 
is empty)

As for the bug you referenced above: Yes, it looks similar, but we have no 
pvmove going on anywhere at any time, but I’ll see if I can try to reproduce 
the error with the many files (kernel source) as described in the bug.

For reference, the LVM versions currently in use:

root@hsoi-gts3-de02:/# lvdisplay --version
  LVM version:     2.02.66(2) (2010-05-20)
  Library version: 1.02.48 (2010-05-20)
  Driver version:  4.25.0


Thanks so far :)

Best regards,

Sascha 

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