I'm not running the latest BIOS yet, no. I plan on trying that once my latest RAID rebuild has finished. I also haven't dug around in the BIOS screens yet to see if there is anything there to help.

You could probably disable one of the drives in the BIOS to test a complete drive failure. Failing that you can do a partial test by failing one of the drives in the array using mdadm.

Edit: I've checked, I'm running the latest BIOS