Reminder -- RAID 5 is not your friend

[gaf-mNDKBlG2WHs at public.gmane.org (Jerry Feldman)]

We had hardware RAID5 at the BLU when it died. We really had no 
indication that even one of the drives were bad.

On 03/10/2010 11:27 PM, Dan Ritter wrote:
> RAID 5 is not your friend.
>
> (RAID 6 may be your friend. RAID Z may be your friend. This is
> not about those.)
>
> A server with a mirrored setup for system disks and a RAID 5 for
> storage reported a disk gone bad in the storage system. OK, the
> alert is received, and we plan to replace the disk in the
> morning.
>
> Before we can get around to it, another disk in the storage
> system also dies. Poof.
>
> We have replaced that entire group now with a RAID 10. We no
> longer have any RAID 5 setups.
>
> Learn from our mistakes; don't use RAID 5 unless you can afford
> to throw away that data and the time it takes to restore from
> backup.
>
> (Other lesson you should already know: RAID is not a backup
> system.)
>
> -dsr-
>
>    


-- 
Jerry Feldman<gaf-mNDKBlG2WHs at public.gmane.org>
Boston Linux and Unix
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