Please excuse a clueless newbie question here,
but if you've got a journaling filesystem, wouldn't you want to expose the
raw disks to it so it can choose to put the journals on different disks
than the files?
This would not only help with performance, but it would also make recovery
as simple as using one of the surviving journal copies and applying that
against the last full backup of the main file system. (I.e. you lose 10
disks out of your 12 disk "array" and wind up not losing a single byte of
data.)
-HJC
