Sorry about that, my previous e-mail had just '--chunk' toward the bottom. It should have been '--chunk=256' Please see the quoted snippet for detail. On Apr 17, 2008, at 1:01 PM, Mark Hennessy wrote: > Ok, I stop the array and rebuild with > mdadm --create /dev/md2 --assume-clean --level=5 --chunk=256 --raid- > devices=8 /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh /dev/ > sdi /dev/sdj