Date: Thu, 22 Jul 2004 17:35:59 +0100 From: Guy Dawson <guy@crossflight.co.uk> To: Eric Toll <etoll@vipstructures.com> Cc: freebsd-hardware@freebsd.org Subject: Re: Is it possible to migrate raid 5 array to another controller? Message-ID: <40FFECEF.7040008@crossflight.co.uk> In-Reply-To: <9BC86C67C3AF7646B9C5382020457A944E4C2A@VIP10-WIN2K> References: <9BC86C67C3AF7646B9C5382020457A944E4C2A@VIP10-WIN2K>
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Eric Toll wrote: > > > >>-----Original Message----- >>From: owner-freebsd-hardware@freebsd.org >>[mailto:owner-freebsd-hardware@freebsd.org] On Behalf Of >>Artem Koutchine >>Sent: Thursday, July 22, 2004 6:05 AM >>To: freebsd-questions@freebsd.org >>Cc: freebsd-hardware@freebsd.org >>Subject: Is it possible to migrate raid 5 array to another controller? >> >>Hello! >> >>If i am running raid5 on 3ware can i use the same disk array as >>raid5 on, for example, high point controller without >>rebuilding the array, just reattching disks to a new >>controller? Basically, i am asking if raid5 is a industrially >>standard or every manufacturer adds something to its specs. >> >>Artem > > > Hmm, I'm thinking no. In order for the new controler to work it needs to > be setup. When new it has no config. You'd need to create a logical drive > stripe size, array size etc from the new controller bios point of view. > Make sure these settings are exactly the same setup as the old controller is using. > Usually creating a logical drive (RAID X) Is a destructive process. I could be wrong. > Get a good backup first before changing controllers, then try it, and you'll have > Nothing but time to loose. I'm agreeing no. There's no standard for how a controller should write RAID meta data to the disks in the array. We have moved disks from one Compaq RAID controller to a newer model but that's because Compaq does, in part, have it's own internal standard for storing meta data. Guy -- -------------------------------------------------------------------- Guy Dawson I.T. Manager Crossflight Ltd guy@crossflight.co.uk 07973 797819 01753 776104 ********************************************************************** This email contains the views and opinions of a Crossflight Limited employee and at this stage are in no way a direct representation of Crossflight Limited. This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. To ensure the integrity and appropriate use of its email system, Crossflight Limited reserves the right to examine any email held on its email system or sent to or from it. This footnote also confirms that this email message has been swept by MIMEsweeper for the presence of computer viruses. We strongly recommend that you check this email with your own virus software as Crossflight Limited will not be held responsible for any damage caused by viruses as a result of opening this email. **********************************************************************
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