From owner-freebsd-questions@FreeBSD.ORG Tue Oct 31 18:41:20 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 A3F3116A54C for ; Tue, 31 Oct 2006 18:41:20 +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 65AB443D67 for ; Tue, 31 Oct 2006 18:40:37 +0000 (GMT) (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 (8.13.6/8.12.11) with ESMTP id k9VIdh9T072124; Tue, 31 Oct 2006 12:39:43 -0600 (CST) Message-Id: <6.0.0.22.2.20061031123441.022660b0@mail.computinginnovations.com> X-Sender: derek@mail.computinginnovations.com X-Mailer: QUALCOMM Windows Eudora Version 6.0.0.22 Date: Tue, 31 Oct 2006 12:39:33 -0600 To: Wayne , FreeBSD Questions From: Derek Ragona In-Reply-To: <454660F0.5010602@xxiii.com> References: <454660F0.5010602@xxiii.com> 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: SCSI Controller 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: Tue, 31 Oct 2006 18:41:20 -0000 If you are using the drives as just SCSI drives and get another controller in the same Manufacturer's "Family" you should be able to just replace the controller. If you use a different manufacturer's controller, you may have to re-format the drives after you do a dump on the old controller. The reason is that there are no "standards" for drive geometry translation. SCSI drives are made to appear to the OS as a series of logical blocks by the controller. The way the controller translates the actual geometry to the logical blocks can differ on different manufacturer's controllers. -Derek At 02:30 PM 10/30/2006, Wayne wrote: >Hey Guys, > >Not entirely FreeBSD specific, but I was hoping someone could help with a >question about SCSI controllers. > >One FreeBSD system here is running drives on an old Adaptec 2940 >controller. I would like to upgrade the controller, as the drives are >actually Ultra 160 capable. Can you normally just swap SCSI drives onto a >different controller, and still access all the data? (like with IDE) Or >will I need to dump & restore, also? > > -Thanks, Wayne >_______________________________________________ >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.