You could use this and then do smartctl -A after for the IO.
This works for me.
Basically you need to run a script that does:
/usr/local/sbin/sdspin /dev/sdX up
/usr/sbin/smartctl -A /dev/sdX
Where X is replaced with the different array devices, ideally the script should get the device list from the array, since sdX can change when new controllers/devices are added, sometimes it even changes without any new ones, I'm not really a script guy, but it should be easy the get them, if not you can always do it manually, but need to be aware that they can change.