>I don't know if it applies to Linux, but I vaguely remember a RAID 1+0 where >the data is both striped and mirrored. Is this superior to RAID 5? Also, for >the very paranoid, I would guess that one could use a RAID 5+0 where the >data is striped w/parity like RAID 5, then each RAID 5 volume is mirrored. >This would seem very excessive, but very safe.
RAID0+1 is exactly as you described, a striped RAID0 array plus a mirror of each drive. The downside to mirror is that you are "wasting" 1/2 of the available DASD space. It's there only if you have a problem. With RAID5 you don't "waste" space. All the DASD space is useable (okay so not all, but almost all). So it's a juggling act between cost for hardware and protection. I don't know if there is such a thing as RAID5+1. Mark D Pace Senior Systems Engineer Mainline Information Systems 1700 Summit Lake Drive Tallahassee, FL. 32317 [EMAIL PROTECTED] Office: 850.219.5184 Fax: 850.219.5050 http://www.mainline.com
