From owner-freebsd-questions@FreeBSD.ORG Thu Mar 27 09:32:32 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 00A6237B401 for ; Thu, 27 Mar 2003 09:32:31 -0800 (PST) Received: from bjwcs.com (swing.bjwcs.com [208.185.25.11]) by mx1.FreeBSD.org (Postfix) with ESMTP id 231F643F93 for ; Thu, 27 Mar 2003 09:32:29 -0800 (PST) (envelope-from brently@bjwcs.com) Received: from samba [68.98.15.6] by bjwcs.com with ESMTP (SMTPD32-7.07) id A5AB31A00F6; Thu, 27 Mar 2003 12:32:27 -0500 From: "Brent Wiese" To: Date: Thu, 27 Mar 2003 10:32:27 -0700 Message-ID: <020401c2f486$d6d280f0$0a0114ac@home.bjwcs.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Importance: Normal In-Reply-To: X-Spam-Status: No, hits=-6.5 required=5.0 tests=IN_REP_TO,QUOTED_EMAIL_TEXT autolearn=ham version=2.50 X-Spam-Level: X-Spam-Checker-Version: SpamAssassin 2.50 (1.173-2003-02-20-exp) Subject: RE: Three Terabyte X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 27 Mar 2003 17:32:33 -0000 > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > On 27-Mar-2003, Francisco J Reyes wrote message "Re: Three=20 > Terabyte"=20 > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Highly recommend you go with Raid 10 and not 5. >=20 >=20 > I 2nd that. Raid 5 offers very very POOR performance. While=20 > it sucks up the most diskspace, Raid 10 is maximum=20 > performance and great fault tolerance. For an i/o intensive=20 > service like a mail server or something, raid 5 will=20 > eventually cause your server to get crushed over time as the=20 > number of users increases. The you're forced to convert to=20 > raid 10. We learnt this the hard way. ;) >=20 Normally, I'd also agree with this. However, a friend of mine built a = NAS using the 3ware card and 11 200gb WD drives in a RAID5 config and can sustain 85mbit/s *write* (the test was several hours long). I suspect it would do even more with a gig-E card. Of course, that test would be fairly meaningless when you're doing = something like a mail spool, but it proves the application should drive the = method. Brent