From owner-freebsd-stable@FreeBSD.ORG Fri Jan 12 03:50:36 2007 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7F7A416A407 for ; Fri, 12 Jan 2007 03:50:36 +0000 (UTC) (envelope-from janm@transactionware.com) Received: from mail.transactionware.com (mail.transactionware.com [203.14.245.7]) by mx1.freebsd.org (Postfix) with SMTP id D3D3113C428 for ; Fri, 12 Jan 2007 03:50:35 +0000 (UTC) (envelope-from janm@transactionware.com) Received: (qmail 43142 invoked from network); 12 Jan 2007 03:50:52 -0000 Received: from midgard.transactionware.com (192.168.1.55) by dm.transactionware.com with SMTP; 12 Jan 2007 03:50:52 -0000 Received: (qmail 26045 invoked by uid 907); 12 Jan 2007 03:50:29 -0000 Received: from [192.168.1.51] (HELO janmxp) (192.168.1.51) by midgard.transactionware.com (qpsmtpd/0.32) with SMTP; Fri, 12 Jan 2007 14:50:29 +1100 Message-ID: <000901c735fc$d180ac10$3301a8c0@janmxp> From: "Jan Mikkelsen" To: "Jo Rhett" References: <45A5FD8A.6080409@svcolo.com><2918081F-D376-410B-B6FD-42BDD3323575@svcolo.com><20070111213444.GB17185@zone3000.net><20070112005510.2e145462.torfinn.ingolfsen@broadpark.no> <669E8D5D-E286-42DC-800F-24D7DDB2469F@svcolo.com> Date: Fri, 12 Jan 2007 14:50:35 +1100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.3790.2826 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.2826 Cc: freebsd-stable@freebsd.org Subject: Re: 2.4TB disk - MBR and GPT coexist? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Jan 2007 03:50:36 -0000 Hi, Jo Rhett wrote: >> On Thu, 11 Jan 2007 13:56:43 -0800 Jo Rhett wrote: >>> Thanks for the reply. The problem is that I have a single 6-drive >>> (550gb/ea) RAID-5 array. If I split two disks off to make a RAID-1 >>> boot device, I'll lose 1TB of usable storage. > > On Jan 11, 2007, at 3:55 PM, Torfinn Ingolfsen wrote: >> Hmm, why can't you just make your controller create two logical arrays >> onto the one physical array? Doesnt the controller support this feature? > > Not any one that I've ever seen in commodity disks. Yes, on big fiber > channel disk cabinets. No to 6-8 drive raid controllers. I'd be very surprised if you can't. You can certainly do it with Areca (arcmsr(4)), HP (ciss(4)), IBM ServeRAID (ips(4)), although the details vary. For example, on an Areca 8 port controller, I have 8 disks in a RAID-6 array, and within that "RAID set", I have three volumes. The three volumes appear to FreeBSD as da0, da1 and da2, respectively. CLI> rsf info Num Name Disks TotalCap FreeCap DiskChannels State =============================================================================== 1 Raid Set # 00 8 2560.0GB 0.0GB 12345678 Rebuilding =============================================================================== GuiErrMsg<0x00>: Success. CLI> vsf info # Name Raid# Level Capacity Ch/Id/Lun State =============================================================================== 1 ARC-1220-VOL#00 1 Raid6 81.0GB 00/00/00 Rebuilding(63.8%) 2 ARC-1220-VOL#01 1 Raid6 1000.0GB 00/01/00 Need Rebuild 3 ARC-1220-VOL#02 1 Raid6 839.0GB 00/02/00 Need Rebuild =============================================================================== GuiErrMsg<0x00>: Success. Regards, Jan Mikkelsen