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Is this XFS problem or something else? : xfs_trans_read_buf error 5 buf

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Subject: Is this XFS problem or something else? : xfs_trans_read_buf error 5 buf count 4096
From: "Bond Masuda" <bm007@xxxxxxx>
Date: Wed, 7 May 2008 08:36:50 -0700
In-reply-to: <20080407220106.GF108924158@sgi.com>
References: <007001c898f5$cae2f4a0$60a8dde0$@masuda@jlbond.com> <20080407220106.GF108924158@sgi.com>
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Thread-index: AciY+ua2wdYV1uP4RtifohcPgNap0AXWJtFA
Not sure if this is XFS related or not, but this seems to be reoccurring. 

The hardware is:

Dell Inspiron 530, Q6600 quad core, 4GB Ram, 2x750GB SATA HDD

I have Fedora 8/64bit installed, using XFS for "/", ext3 for "/boot". The
two identical 750GB drives are striped to create a 1.4TB "md1" device, which
is mounted as "/". Kernel is from Fedora8, 2.6.24.4-64.fc8.

During the install, everything seemed to work fine. I was able to use the
system without any problems for about 2 days. Then I reboot, and the md1
device running XFS shows the following error messages:

I/O error in filesystem ("md1") meta-data dev md1 block 0x15d048574120008
("xfs_trans_read_buf") error 5 buf count 4096
attempt to access beyond end of device
md1: rw=0, want=98239738096517136, limit=2927780864

The above message repeats several times, but the system manages to boot to
runlevel 3. I can login, but almost any command triggers that message which
has flooded the logs. here is xfs_info on "/":

meta-data=/dev/root                     isize=256       agcount=32,
agsize=11436608 blks
           =                                    sectsz=512      attr=1
data       =                                    bsize=4096
blocks=365971456, imaxpct=25
           =                                    sunit=64        swidth=128
blks, unwritten=1
naming   =version2                      bsize=4096
log        =internal                    bsize=4096      blocks=32768,
version=1
           =                                    sectsz=512      sunit=0
blks, lazy-count=0
realtime =none                          extsz=524288 blocks=0, rtextents=0

At first, I thought perhaps something wrong with the disks so I had them
replaced. Reinstalled Fedora8 as before, then again, 2 days later (I don't
know if the 2 day time period is coincidental or not), I reboot, and the
exact same problem occurred. Since I've gone through 4 brand new 750GB HDD
now, (Seagate diagnostics show all the disks to be fine in both occurances,
but I replaced them anyway) I'm feeling that this is not a hardware issue,
but software related.

A search on google seems to show others with possibly similar issues:

http://ubuntuforums.org/archive/index.php/t-568309.html

Is that related? Other google searches show a pattern of this problem only
with >1TB XFS partitions, but that's just what I found googling.

I'm considering re-installing again, but using ext3 for "/" to see if the
problem reoccurs, in hopes of "isolating" the issue. Not sure if it is
related to XFS, the software stripe md1, or something else (but I don't
think it's HDD related now).

Thanks for any info or assistance. Though the system isn't really usable,
(many commands fail, but does boot to runlevel 3 and permits me to login)
I'll leave it as is for today so let me know if there's other info I can try
to gather that would be useful.

Any help would be appreciated.
-Bond



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