Reminder -- RAID 5 is not your friend

[Dan Ritter]

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-

-- 
http://tao.merseine.nu/~dsr/eula.html is hereby incorporated by reference.
You can't defend freedom by getting rid of it.