From owner-freebsd-questions Fri Aug 17 9:44:35 2001 Delivered-To: freebsd-questions@freebsd.org Received: from panzer.kdm.org (panzer.kdm.org [216.160.178.169]) by hub.freebsd.org (Postfix) with ESMTP id 6D8C237B407; Fri, 17 Aug 2001 09:44:27 -0700 (PDT) (envelope-from ken@panzer.kdm.org) Received: (from ken@localhost) by panzer.kdm.org (8.9.3/8.9.1) id KAA46469; Fri, 17 Aug 2001 10:44:11 -0600 (MDT) (envelope-from ken) Date: Fri, 17 Aug 2001 10:44:11 -0600 From: "Kenneth D. Merry" To: Tom Samplonius Cc: Chris Dillon , Shawn Ramsey , questions@FreeBSD.ORG, scsi@FreeBSD.ORG Subject: Re: Moving between Mylex cards? Message-ID: <20010817104411.A46409@panzer.kdm.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from tom@sdf.com on Fri, Aug 17, 2001 at 09:06:52AM -0700 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, Aug 17, 2001 at 09:06:52 -0700, Tom Samplonius wrote: > > On Thu, 16 Aug 2001, Chris Dillon wrote: > > > On Thu, 16 Aug 2001, Shawn Ramsey wrote: > > > > > Has anyone ever moved a RAID config from say an AcceleRAID 150 to an > > > ExtremeRAID 1100 or 2000? I talked to Mylex and they say there _shouldn't_ > > > be a problem. With COD (configuration on disk) the RAID config should be > > > automatically recognized and work like before... > > > > > > > There is definately no problem if you're using a RAID1 (mirroring) > > array. You can even take a unit out of a RAID1 array and attach it to > > a standard SCSI controller and it will work fine. > > And you've done that? That will not work on most controllers, because > of the config on disk. It is stored on the beginning of each disk. > Since I can move disks from channel to channel and id to id, and the > controller still knows which physical disks belong to which logical disk > set, I would have to say that you are going to have a problem. I wouldn't necessarily bet that most controllers have their configuration at the beginning of the disk. The Adaptec smart raid (former DPT) controllers put their configuration at the end of the disk. I don't know about other RAID controllers, though. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message