From owner-freebsd-hardware Tue Mar 27 7:45:31 2001 Delivered-To: freebsd-hardware@freebsd.org Received: from edwin.mounet.com (edwin.mounet.com [216.145.76.8]) by hub.freebsd.org (Postfix) with SMTP id 43AE137B718 for ; Tue, 27 Mar 2001 07:45:18 -0800 (PST) (envelope-from hornback@wireco.net) Received: (qmail 22527 invoked by uid 0); 27 Mar 2001 15:29:02 -0000 Received: from unknown (HELO tomcat) (216.145.67.98) by mounet.com with SMTP; 27 Mar 2001 15:29:02 -0000 From: "Andrew C. Hornback" To: "Joseph Gleason" Cc: "FreeBSD Hardware" Subject: RE: Server MB suggestions? Date: Tue, 27 Mar 2001 10:46:18 -0500 Message-ID: <007001c0b6d5$101e89e0$0e00000a@tomcat> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 In-Reply-To: <005801c0b652$429f8d20$dc02010a@fireduck.com> Importance: Normal Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > -----Original Message----- > From: owner-freebsd-hardware@FreeBSD.ORG > [mailto:owner-freebsd-hardware@FreeBSD.ORG]On Behalf Of Joseph Gleason > Sent: Monday, March 26, 2001 7:10 PM > To: Michael VanLoon; Ed Henderson; freebsd-hardware@FreeBSD.ORG > Subject: Re: Server MB suggestions? > > > Some of the 3ware products will take 8 drives. If you stock it with 75gb > drives that is 600gb. If you need more than that, I guess this probably > isn't the solution for you. > > The 3ware cards will do the RAID with IDE. I don't want to start a holy > war, but I really see no need for SCSI if you follow a few basic > rules with > your IDE drives. > > 1) Get good drives (IBM) Agreed. They make the best drives, hands down. > 2) Get good controllers (3ware for RAID-10) or Promise cards Agreed again, if you're doing IDE. > 3) Keep it at one drive per chain. I am no hardware expert, but it is my > understanding that there are major performance hits if you have two drives > on a single chain. That last assertion depends on the controller, the drives and the RAID schema that you are using (i.e. SCSI). Hang 4 Ultra160 drives off of a UW controller, and you're going to see performance dips. Hang 4 UW drives off of an Ultra160 controller, and you should (if configured properly) see a performance increase. You have to remember that for RAID 1 (or other mirroring setups) for every read request, you're hardware is actually doing two (or more). But, you can regain some of that performance by going to a striping schema which allows the hardware to read across more than one physical drive, utilizing higher output. --- Andy To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message