Re: Advice needed with file system corruption

From: Steve Brooks <sjb14@st-andrews.ac.uk>
To: xfs@oss.sgi.com
Subject: Re: Advice needed with file system corruption
Date: Thu, 14 Jul 2016 14:57:25 +0100	[thread overview]
Message-ID: <57879A45.6020307@st-andrews.ac.uk> (raw)
In-Reply-To: <20160714130546.GB16096@redhat.com>

Hi Carlos,

Many thanks again, for your good advice. I ran the version 4.3 of 
"xfs_repair" as suggested below and it did it's job very quickly in 50 
seconds exactly as reported in the "No modify mode". Is the time 
reported at the end of the "No modify mode" always a good approximation 
of running in "modify mode" ?

Anyway all is good now and it looks like any missing files are now in 
the "lost+found" directory.

Steve

On 14/07/16 14:05, Carlos Maiolino wrote:
> Hi steve.
>
> On Thu, Jul 14, 2016 at 01:27:22PM +0100, Steve Brooks wrote:
>> The "3.1.1"  version of "xfs_repair -n" ran in 1 minute, 32 seconds
>>
>> The "4.3"     version of "xfs_repair -n" ran in 50 seconds
>>
> Yes, the later versions are compatible with old disk-format filesystems,
> and they have improvements in memory usage, speed, etc too
>
>> So my questions are
>>
>> [1] Which version of "xfs_repair" should I use to make the repair?
>>
>> [2] Is there anything I should have done differently?
>>
> No, just use the latest stable one, and the defaults, unless you have a good
> reason to not use default options, which by your e-mail I believe you don't have
> one.
>
> The logs you send below, looks from a corrupted btree, but xfs_repair should be
> able to fix that for you.
>
> Cheers.
>
>
>> Many thanks for any advice given it is much appreciated.
>>
>> Thanks,  Steve
>>
>>
>>
>> Many blocks (about 20) of code similar to this were repeated in the logs.
>>
>> Jul  8 18:40:17 sraid1v kernel: ffff880dca95b000: 00 00 00 00 00 00 00 00 00
>> 00 00 00 00 00 00 00  ................
>> Jul  8 18:40:17 sraid1v kernel: XFS (sde): Internal error xfs_da_do_buf(2)
>> at line 2136 of file fs/xfs/xfs_da_btree.c. Caller 0xffffffffa0e6e81a
>> Jul  8 18:40:17 sraid1v kernel:
>> Jul  8 18:40:17 sraid1v kernel: Pid: 8844, comm: idl Tainted: P           --
>> ------------    2.6.32-642.el6.x86_64 #1
>> Jul  8 18:40:17 sraid1v kernel: Call Trace:
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e7b68f>] ?
>> xfs_error_report+0x3f/0x50 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e6e81a>] ?
>> xfs_da_read_buf+0x2a/0x30 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e7b6fe>] ?
>> xfs_corruption_error+0x5e/0x90 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e6e6fc>] ?
>> xfs_da_do_buf+0x6cc/0x770 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e6e81a>] ?
>> xfs_da_read_buf+0x2a/0x30 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff810154e3>] ?
>> native_sched_clock+0x13/0x80
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e6e81a>] ?
>> xfs_da_read_buf+0x2a/0x30 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e74a21>] ?
>> xfs_dir2_leaf_lookup_int+0x61/0x2c0 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e74a21>] ?
>> xfs_dir2_leaf_lookup_int+0x61/0x2c0 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e74e05>] ?
>> xfs_dir2_leaf_lookup+0x35/0xf0 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e71306>] ?
>> xfs_dir2_isleaf+0x26/0x60 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e71ce4>] ?
>> xfs_dir_lookup+0x174/0x190 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e9ea47>] ? xfs_lookup+0x87/0x110
>> [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0eabd74>] ?
>> xfs_vn_lookup+0x54/0xa0 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff811a9ca5>] ? do_lookup+0x1a5/0x230
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff811aa823>] ?
>> __link_path_walk+0x763/0x1060
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff811ab3da>] ? path_walk+0x6a/0xe0
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff811ab5eb>] ?
>> filename_lookup+0x6b/0xc0
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff8123ac46>] ?
>> security_file_alloc+0x16/0x20
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff811acac4>] ?
>> do_filp_open+0x104/0xd20
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffffa0e9a4fc>] ?
>> _xfs_trans_commit+0x25c/0x310 [xfs]
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff812a749a>] ?
>> strncpy_from_user+0x4a/0x90
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff811ba252>] ? alloc_fd+0x92/0x160
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff81196bd7>] ?
>> do_sys_open+0x67/0x130
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff81196ce0>] ? sys_open+0x20/0x30
>> Jul  8 18:40:17 sraid1v kernel: [<ffffffff8100b0d2>] ?
>> system_call_fastpath+0x16/0x1b
>> Jul  8 18:40:17 sraid1v kernel: XFS (sde): Corruption detected. Unmount and
>> run xfs_repair
>> Jul  8 18:40:17 sraid1v kernel: ffff880dca95b000: 00 00 00 00 00 00 00 00 00
>> 00 00 00 00 00 00 00  ................
>> Jul  8 18:40:17 sraid1v kernel: XFS (sde): Internal error xfs_da_do_buf(2)
>> at line 2136 of file fs/xfs/xfs_da_btree.c. Caller 0xffffffffa0e6e81a
>> Jul  8 18:40:17 sraid1v kernel:
>> Jul  8 18:40:17 sraid1v kernel: Pid: 8844, comm: idl Tainted: P           --
>> ------------    2.6.32-642.el6.x86_64 #1
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> xfs mailing list
>> xfs@oss.sgi.com
>> http://oss.sgi.com/mailman/listinfo/xfs

-- 
Dr Stephen Brooks

Solar MHD Theory Group
Tel    ::  01334 463735
Fax    ::  01334 463748
---------------------------------------
Mathematical Institute
North Haugh
University of St. Andrews
St Andrews, Fife KY16 9SS
SCOTLAND
---------------------------------------

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