-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Charles Steinkuehler wrote:
Luke-Jr wrote:
So anyway... what's the pros/cons of the various RAID configurations possible with 8 of 18 GB HDs? ;) Any reason to use RAID 5+0 over just RAID 5? At first glance, while 5+0 allows loss of two disks, that only appears to be the case if both disks are in a separate set of 4. If there's two disks failing, wouldn't that be a 50:50 chance on 5+0 being ok, or being dead? Is it worth the 18 GB to get that 50:50 chance?
If you're thinking about RAID 5+0 (presumably dual 4-disk RAID 5 sets), just run one RAID5 array with 7 disks, and leave the eighth as a hot-spare. You can still sort-of loose two disks (as long as they don't both go within a RAID rebuild time of each other...much better odds than your 5+0),
and you get an extra 18 Gig of drive space.
Umm...I must not be good at math in my head today...
Both options would loose the capacity of two disks, so there's no capacity benefit to either approach. The difference is only in the fault tolerance when loosing two disks (IMHO, the 7-disk RAID5 with a hot-spare is better than running RAID 5+0).
- -- Charles Steinkuehler [email protected]