Question: Disk Mirroring preceding RAID? - test-drb@ccmp.vtda.org

10 Dec 2000

From: Richard Erlacher &lt;edick(a)idcomm.com&gt;
To: classiccmp(a)classiccmp.org &lt;classiccmp(a)classiccmp.org&gt;
Date: Monday, December 04, 2000 8:48 PM
Subject: Re: Question: Disk Mirroring preceding RAID?

...
 Back in '90.  I tried the Novell NETWARE approach
to mirroring, but was
unable to make it work.  That was due to the fact that the ADAPTEC
controller I was using didn't really work correctly at the alternate address
...
 with the driver they provided for that purpose.  I
quickly abandoned it, in
...
 favor of the software RAID offered by NT. 

I currently running NT4/server using Adaptec and two 9gb drives and it's
very well behaved with only one caveat, it is a tad slower.  The NT4
software RAID also work nearly as well and has behaved itself.

The biggest fail point is many raid (scsi based) system use the same
channel for both drives and the bus is then the weak point.

However, my interest is data recovery on failure not 100% uptime.
your design goals vay vary. ;)

Allison