From owner-freebsd-scsi@FreeBSD.ORG Wed Apr 21 13:44:18 2004 Return-Path: Delivered-To: freebsd-scsi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 15D6F16A4CE for ; Wed, 21 Apr 2004 13:44:18 -0700 (PDT) Received: from bremen.shuttle.de (bremen.shuttle.de [194.95.249.251]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2281043D49 for ; Wed, 21 Apr 2004 13:44:17 -0700 (PDT) (envelope-from schweikh@schweikhardt.net) Received: by bremen.shuttle.de (Postfix, from userid 10) id 881E73BCDE; Wed, 21 Apr 2004 22:44:15 +0200 (CEST) Received: from hal9000.schweikhardt.net (localhost [127.0.0.1]) i3LKi9bj044754 for ; Wed, 21 Apr 2004 22:44:09 +0200 (CEST) (envelope-from schweikh@hal9000.schweikhardt.net) Received: (from schweikh@localhost) by hal9000.schweikhardt.net (8.12.11/8.12.11/Submit) id i3LKi9Hv044753 for freebsd-scsi@freebsd.org; Wed, 21 Apr 2004 22:44:09 +0200 (CEST) (envelope-from schweikh) Date: Wed, 21 Apr 2004 22:44:09 +0200 From: Jens Schweikhardt To: freebsd-scsi@freebsd.org Message-ID: <20040421204409.GA44407@schweikhardt.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.6i Subject: Hardware Striping X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Apr 2004 20:44:18 -0000 hello, world\n I want to change my system to no longer use vinum for striping, but rather a hardware solution. I do not intend to use mirroring or any other RAIDn>0 functionality. I have two pairs of identical U160 SCSI disks (2 Fujitsu MAN and MAM with 36GB each) where I want to build two mirrors, one from the MANs, and one from the MAMs. You get the idea. Until now I'm using an Adaptec 29160 Host Adapter, but of course it is not HW-RAID0 capable. What card am I looking for? The disks have a sustained read rate of 60 to 70 Mbyte/s, so if all of them were used at the same time they could saturate an U160 bus. Is this a problem? Regards, Jens -- Jens Schweikhardt http://www.schweikhardt.net/ SIGSIG -- signature too long (core dumped)