How to use iostat with AppleRAID volume? When I try iostat disk5, I get the error:  

iostat: could not record 'disk5' for monitoring


Iostat works with my other drives, and with the individual disks which make up the RAID volume.  How can I get the speed of disk5, which is an AppleRAID volume?
BSD iostat - yeeeecchhhhh. There are some things that Gnu/Linux just does better.

What happens when you try iostat -d -n 9 - that should give you an iostat on the first 9 drives hooked up (if you have 9 drives).