Question: Disk Mirroring preceding RAID?

From: McFadden, Mike <mmcfadden_at_cmh.edu>
Date: Tue Dec 5 14:36:25 2000

Other disk configurations
I seem to remember that there were dual ported CDC disk drives used by AT&T
with their 3B20's as a reliable but not cheap mechanism to increase
throughput, mirror data, and allow online backups without shutting down the
machines. The Western Electric plant in Kansas City used these
configurations to monitor memory chip production. I don't remember the model
number but I seem to remember that they looked like RP04's. Each machine in
a pair had 2 dedicated disk drives and 1 shared disk drive.

RAID = Redundant Array of *Inexpensive* Disks
REDHUT = Really expensive disks hooked up together

I believe that EMC and Storage Tech are currently both trying to go into the
REDHUT business.

Mike
mmcfadden_at_cmh.edu
Received on Tue Dec 05 2000 - 14:36:25 GMT