Date: Tue, 27 Mar 2001 10:46:18 -0500 From: "Andrew C. Hornback" <hornback@wireco.net> To: "Joseph Gleason" <clash@fireduck.com> Cc: "FreeBSD Hardware" <hardware@FreeBSD.ORG> Subject: RE: Server MB suggestions? Message-ID: <007001c0b6d5$101e89e0$0e00000a@tomcat> In-Reply-To: <005801c0b652$429f8d20$dc02010a@fireduck.com>
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> -----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
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