From owner-freebsd-questions@FreeBSD.ORG Wed Feb 14 22:35:10 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E7F2A16A402 for ; Wed, 14 Feb 2007 22:35:09 +0000 (UTC) (envelope-from derek@computinginnovations.com) Received: from betty.computinginnovations.com (dsl081-227-250.chi1.dsl.speakeasy.net [64.81.227.250]) by mx1.freebsd.org (Postfix) with ESMTP id 6A25713C4A6 for ; Wed, 14 Feb 2007 22:35:07 +0000 (UTC) (envelope-from derek@computinginnovations.com) Received: from p28.computinginnovations.com (dhcp-10-20-30-100.computinginnovations.com [10.20.30.100]) (authenticated bits=0) by betty.computinginnovations.com (8.13.8/8.12.11) with ESMTP id l1EMYWTx048481; Wed, 14 Feb 2007 16:34:32 -0600 (CST) Message-Id: <6.0.0.22.2.20070214161344.0278ad60@mail.computinginnovations.com> X-Sender: derek@mail.computinginnovations.com X-Mailer: QUALCOMM Windows Eudora Version 6.0.0.22 Date: Wed, 14 Feb 2007 16:34:18 -0600 To: "Dak Ghatikachalam" , "FreeBSD - Questions" From: Derek Ragona In-Reply-To: References: Mime-Version: 1.0 X-ComputingInnovations-MailScanner-Information: Please contact the ISP for more information X-ComputingInnovations-MailScanner: Found to be clean X-ComputingInnovations-MailScanner-From: derek@computinginnovations.com X-Spam-Status: No Content-Type: text/plain; charset="us-ascii"; format=flowed X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Subject: Re: RAID 10-LUN Question X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Feb 2007 22:35:10 -0000 RAID 10 uses even numbered drive sets, usually in 4's, so 4 drives, 8 drives, 12 drives, etc. Depending on how 24/7 self-managed you want the array, you should plan for at least 2 hot spare drives for fail over. So in your setup you could have one logical array made up of 12 drives, with 2 spares, and one left for the OS. One consideration in striping is the stripe size. Stripe size effects performance but also storage efficiency. So you want to balance those factors in choosing a stripe size. One last issue, is make sure you have enough cache on the RAID controller. -Derek At 02:54 PM 2/14/2007, Dak Ghatikachalam wrote: >Hi Freebsd > > >We have DELL/EMC CX-300 storage array hardware , Navisphere. , which consist >of 15 Disks 320GB, I am planning to use this for Oracle( Linux) + SQL >server(M$) purpose. > >We need to get that redundancy using RAID 10 and striple for the best >performance. > >My thoughts are take most even number of possible disks( leaving private >system partition area) and create the raid groups and kick a separate LUNS >for MSSQL purpose. > >With this hardware config, Do you have any suggestion on getting the best >performance and redundancy in place > >Thanks >Dak >_______________________________________________ >freebsd-questions@freebsd.org mailing list >http://lists.freebsd.org/mailman/listinfo/freebsd-questions >To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" > >-- >This message has been scanned for viruses and >dangerous content by MailScanner, and is >believed to be clean. >MailScanner thanks transtec Computers for their support. > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support.