let me preface by saying I am no storage expert. I dable a bit but
you have 8 x 6 disk raid 5
so you have 8 x 1 raid5 parity disks (roughly), you can loose only 1 disk from each array before you are close to trouble ...
why not move to
1 big raid 6 ( with 1 or 2 hot spares).
leave you with 2 parity disks and 6 spare disks (2 of which you can assign to hot spare).
This way you have 48 - 2 -2 ( total spindles - 2 for raid -2 for hot spare ) = 44
44 spindles to handle all the io for all the sql servers.
where as you had
6 - 1 ( 6 disks in lun - 1 for parity) 5 spindles for each sql server.
BUT you might just have too much io for the setupp you have Image may be NSFW.
Clik here to view.
im not sure
there is more risk, if you loose 3 drives within the recovery period your hosed... on all the sql servers.
