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Re: Soft-RAID and Hard-RAID?

At 5:16 PM -0400 4/29/02, Kok-Yong Tan wrote:
While a RAID 5 config may function perfectly well with one drive missing, what do you think will happen if you do so and another drive fails before the RAID system is rebuilt?

the exact same thing that will happen with your RAID 1 if the mirrored drive fails after the primary. You're contrasting RAID1 with RAID5...but BOTH will give you catastrophic, unrecoverable data loss in the instance that you specify.

Unlikely, you say? Well, it happened to me and, boy, will I not do it again!!! Now, I always work on the worst case scenario, especially when handling data and leave the "cowboying" to other people. Perhaps you've had bad experiences with badly implemented RAID 1 solutions but the systems I manage have complete failover where someone can yank a RAID-1 drive out and it will failover instantly to the mirrored volume with nary a hiccup.

But you said that before we insert a new drive, the second drive fails. In that instance, with your RAID1, you're still hosed. Only extoll the virtues of your system if it does *NOT* have the same limitation that you're complaining about.

Of course, all our arguments are moot because they aren't available to MacOS X Server. Oh well. Let's leave it at that.

Sez who? Lots of people are running RAID levels zero, one, and five on OSX(S). They're just not running SOFTWARE versions of L5. But that is said of System 9 as well. Remus was only qualified up to OS8.x.

Mike
--
Bikers don't *DO* taglines.
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References: 
 >Re: Soft-RAID and Hard-RAID? (From: "Jon L. Gardner" <email@hidden>)
 >Re: Soft-RAID and Hard-RAID? (From: Kok-Yong Tan <email@hidden>)



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