From owner-freebsd-questions  Mon Oct  2 20:25:25 1995
Return-Path: owner-questions
Received: (from root@localhost)
          by freefall.freebsd.org (8.6.12/8.6.6) id UAA01904
          for questions-outgoing; Mon, 2 Oct 1995 20:25:25 -0700
Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211])
          by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id UAA01890
          for <questions@freebsd.org>; Mon, 2 Oct 1995 20:25:21 -0700
Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id UAA00415; Mon, 2 Oct 1995 20:23:11 -0700
From: Terry Lambert <terry@lambert.org>
Message-Id: <199510030323.UAA00415@phaeton.artisoft.com>
Subject: Re: RAID solutions for FreeBSD
To: gibbs@freefall.FreeBSD.org (Justin T. Gibbs)
Date: Mon, 2 Oct 1995 20:23:11 -0700 (MST)
Cc: rsnow@txdirect.net, nc@ai.net, terry@lambert.org, questions@freebsd.org
In-Reply-To: <199510030319.UAA07283@aslan.cdrom.com> from "Justin T. Gibbs" at Oct 2, 95 08:19:59 pm
X-Mailer: ELM [version 2.4 PL24]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Content-Length: 656       
Sender: owner-questions@freebsd.org
Precedence: bulk

> >Might be the easiest for FreeBSD since we have such good Adaptec support.
> 
> Yeah well I don't think it would be.  Basically I'd have to write a
> RAID[1-5] implementation (or most of it) down at the SCSI sequencer level
> for that card, and Adaptec doesn't have *any* technical info about the
> 3985 availible at the moment.

I *know* that 1-3 can be done without sequencer level coding.  I suspect
that 4-5 can be too, albiet at a *very* high cost in processing time.

Check out the ZEBRA FS papers (RAID II).


					Terry Lambert
					terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.