At 12:17 AM 25/03/2006, Per Jessen wrote:
All,
probably a little OT here, but I _am_ using SUSE Linux :-)
I'm trying to work out the optimal (or near-optimal at least) RAID configuration of a 24-disk array. The array comes with two redundant RAID controllers each with six SCSI channels. These controllers allow all kinds of RAID0/1/5 configurations, but no RAID6.
I want the array to be able to survive a two disk failure, so RAID6 would be the obvious choice, but ...
So I'm sort of looking at choosing between -
- using plain software RAID6 and ignoring the hardware RAID facilities of the array. - using the hardware controllers to build a combination of RAID0/1/5 that'll give me the two drive failure survivability.
I've had a look around the web, but googling for "two drive failure RAID" almost always leads to someone talking about RAID6 ...
So, opinions/suggestions?
/Per Jessen, Zürich
mirrored hw raid5 with separate cards per array for i/o and a dualscsiport RAM card in a spare of the mirrored pair for superfast cross transfer. Talk to the Novell 4 folks (if any are still around) as they set some of these up in the last Brainshare we had in Australia. There was a Novell "whitepaper" on them as the idea was new then.