From owner-freebsd-stable Wed May 29 7: 9:39 2002 Delivered-To: freebsd-stable@freebsd.org Received: from magic.adaptec.com (magic.adaptec.com [208.236.45.80]) by hub.freebsd.org (Postfix) with ESMTP id EC44537B406 for ; Wed, 29 May 2002 07:09:31 -0700 (PDT) Received: from redfish.adaptec.com (redfish.adaptec.com [162.62.50.11]) by magic.adaptec.com (8.10.2+Sun/8.10.2) with ESMTP id g4TE9Uj16578; Wed, 29 May 2002 07:09:30 -0700 (PDT) Received: from btc.btc.adaptec.com (btc.btc.adaptec.com [10.100.0.52]) by redfish.adaptec.com (8.8.8+Sun/8.8.8) with ESMTP id HAA25039; Wed, 29 May 2002 07:09:29 -0700 (PDT) Received: from hollin.btc.adaptec.com (hollin [10.100.253.56]) by btc.btc.adaptec.com (8.8.8+Sun/8.8.8) with ESMTP id IAA05319; Wed, 29 May 2002 08:09:28 -0600 (MDT) Received: from hollin.btc.adaptec.com (localhost [127.0.0.1]) by hollin.btc.adaptec.com (8.12.3/8.12.3) with ESMTP id g4TE6wrP002283; Wed, 29 May 2002 08:06:58 -0600 (MDT) (envelope-from scottl@hollin.btc.adaptec.com) Received: (from scottl@localhost) by hollin.btc.adaptec.com (8.12.3/8.12.3/Submit) id g4TE6sG1002282; Wed, 29 May 2002 08:06:54 -0600 (MDT) Date: Wed, 29 May 2002 08:06:54 -0600 From: Scott Long To: "Philip J. Koenig" Cc: stable@freebsd.org Subject: Re: Hardware RAID vs vinum Message-ID: <20020529140654.GB2262@hollin.btc.adaptec.com> References: <20020529084340715.AAA489@empty1.ekahuna.com@pc02.ekahuna.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020529084340715.AAA489@empty1.ekahuna.com@pc02.ekahuna.com> User-Agent: Mutt/1.3.25i Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Wed, May 29, 2002 at 01:43:42AM -0700, Philip J. Koenig wrote: > > Date: Tue, 28 May 2002 18:59:26 -0600 > > From: "Long, Scott" > > > > > On Tuesday, 28 May 2002 at 13:04:19 -0700, Doug White wrote: > > > > On Tue, 28 May 2002, Greg 'groggy' Lehey wrote: > > > > > > > >> This can only happen if there's something very wrong with > > > the software > > > >> RAID-5, either the implementation or the configuration. One thing > > > >> that springs to mind is too small a stripe size. There's > > > a myth going > > > >> around that this improves performance, when in fact it seriously > > > >> degrades it. > > [...] > > > Greg, the companies that make RAID hardware are not filled with a > > bunch of idiots. > > > > Scott > > > Speaking of RAID hardware engineers, is that 5400 card that was > mentioned here earlier architecturally close to the 32xx/34xx DPT > designs now sold by Adaptec, or a new design? (I assume you inherited > most of DPT's engineers when you bought them) > > Actually now that I look at it, it must have diverged because it uses > a different driver.. The 5400S inherits very little from the DPT designs. It's actually the same architecture that we've been selling to Dell (under the PERC2/3 name) and HP (under the NetRAID-4M name) for a number of years. Scott To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message