On Fri, 5 Oct 2007, Andrew Clayton wrote:

On Fri, 5 Oct 2007 10:07:47 -0400 (EDT), Justin Piszcz wrote:

quoted

Yikes, yeah I would get them off the PCI card, what kind of
motherboard is it?  If you don't have a PCI-e based board it probably
won't help THAT much but it still should be better than placing 3
drives on a PCI card.

Moved the drives back onto the on board controller.

While I had the machine down I ran memtest86+ for about 5 mins, no
errors.

I also got the output of mkfs.xfs -f -N /dev/md0

meta-data=/dev/md0               isize=256    agcount=16, agsize=7631168 blks
        =                       sectsz=4096  attr=0
data     =                       bsize=4096   blocks=122097920, imaxpct=25
        =                       sunit=64     swidth=128 blks, unwritten=1
naming   =version 2              bsize=4096
log      =internal log           bsize=4096   blocks=32768, version=2
        =                       sectsz=4096  sunit=1 blks, lazy-count=0
realtime =none                   extsz=524288 blocks=0, rtextents=0

quoted

Justin.

Thanks for your help by the way.

Andrew

Hm, unfortunately at this point I think I am out of ideas you may need to 
ask the XFS/linux-raid developers how to run blktrace during those 
operations to figure out what is going on.

BTW: Last thing I can think of, did you make any changes to PREEMPTION in 
the kernel, or do you disable it (SERVER)?

Justin.