I/O error, SCSI error, reservation conflict.... xfs suggestions?

I/O error, SCSI error, reservation conflict.... xfs suggestions?

[pgf111000]

Hello all-

I am in an fc6 x86_64 environment on an lvm2 ext3 fs (mkfs'd to a segate
750)... this is the host os.  The target os is a CLFS environment, which is
built on a areca 1280 hw raid6 (arcmsr driver compiled from source) 4
seagates (750s) array; all of the above on an AMD Opteron based tyan
board.....

the target os has three primary partitions:

boot- xfs
swap- swap
lvm2

The lvm partition has one pv (being the areca array); the lvm has multiple
lv's.... a few lv's are straight xfs, other lv's are 
LUKS w/ the mapped drive being xfs.

I'v read the doc at: http://web.bii.a-star.edu.sg/~james/100TB/14TB/#f  
...it's useful, but...

In the middle of read/write operations on the xfs formatted areca array I
experience the following repetative message (from /var/log/messages):

sd 3:0:1:0: reservation conflict
sd 3:0:1:0: SCSI error: return code = 0x00070018
end_request: I/O error, dev sdx, sector 681896097

The "SCSI error: return code" consistently returns "0x00070018".  The
"end_request: I/O error, dev sdx, sector" returns various sector values. 
The opteron produces significant io wait during these errors; the read/write
performance is marginal (in general).

I have run xfs_check on all the  parititions (LUKS/xfs and xfs)... no
errors.  I have scanned the array volume (on the hardware level)... no
errors.   I have run badblocks -nsv  ...on most of the parititions (LUKS/xfs
and xfs)... no error.  

Any and all thoughts/suggestions will be warmly received....
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Re: I/O error, SCSI error, reservation conflict.... xfs suggestions?

[Eric Sandeen]

pgf111000 wrote:
> In the middle of read/write operations on the xfs formatted areca array I
> experience the following repetative message (from /var/log/messages):
> 
> sd 3:0:1:0: reservation conflict
> sd 3:0:1:0: SCSI error: return code = 0x00070018
> end_request: I/O error, dev sdx, sector 681896097

...

> Any and all thoughts/suggestions will be warmly received....

Well, this isn't an xfs problem.  Something is happening at the scsi
layer, whatever xfs does after that is simply reacting (properly) to it.

I'd try another list... :)

-Eric

Re: I/O error, SCSI error, reservation conflict.... xfs suggestions?

[Chris Wedgwood]

On Fri, Feb 23, 2007 at 11:13:03AM -0800, pgf111000 wrote:

> sd 3:0:1:0: reservation conflict

some other host has reserve (part) of your storage system, best you go
whack them or something

> sd 3:0:1:0: SCSI error: return code = 0x00070018
> end_request: I/O error, dev sdx, sector 681896097

low-level errors, not XFS