On Fri, 5 Oct 2007 07:08:51 -0400 (EDT), Justin Piszcz wrote:

The mount options are from when the filesystem was made for
sunit/swidth I believe.

        -N     Causes the file system parameters  to  be  printed
out  without really creating the file system.

You should be able to run mkfs.xfs -N /dev/md0 to get that
information.

Can't do it while it's mounted. would xfs_info show the same stuff?

/dev/md3        /r1             xfs
noatime,nodiratime,logbufs=8,logbsize=262144 0 1

Try using the following options and the AS scheduler and let me know
if you still notice any 'hangs'

OK, I've remounted (mount -o remount) with those options. 
I've set the strip_cache_size to 8192
I've set the nr_requests back to 128
I've set the schedulers to anticipatory.

Unfortunately problem remains.

I'll try the noop scheduler as I don't think I ever tried that one.
 

Justin.

Andrew