From owner-freebsd-questions@FreeBSD.ORG Mon Oct 13 04:09:40 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C72F41065694 for ; Mon, 13 Oct 2008 04:09:40 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from QMTA07.westchester.pa.mail.comcast.net (qmta07.westchester.pa.mail.comcast.net [76.96.62.64]) by mx1.freebsd.org (Postfix) with ESMTP id 740808FC14 for ; Mon, 13 Oct 2008 04:09:40 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from OMTA01.westchester.pa.mail.comcast.net ([76.96.62.11]) by QMTA07.westchester.pa.mail.comcast.net with comcast id RsMG1a0030EZKEL5749fjp; Mon, 13 Oct 2008 04:09:39 +0000 Received: from koitsu.dyndns.org ([69.181.141.110]) by OMTA01.westchester.pa.mail.comcast.net with comcast id S49e1a0022P6wsM3M49ed4; Mon, 13 Oct 2008 04:09:39 +0000 X-Authority-Analysis: v=1.0 c=1 a=QycZ5dHgAAAA:8 a=jE9KjmuEKUjxM7mixGcA:9 a=RpeGhdXBvp-7mUlk4dgEclSYxnkA:4 a=EoioJ0NPDVgA:10 a=LY0hPdMaydYA:10 Received: by icarus.home.lan (Postfix, from userid 1000) id C492AC9419; Sun, 12 Oct 2008 21:09:37 -0700 (PDT) Date: Sun, 12 Oct 2008 21:09:37 -0700 From: Jeremy Chadwick To: Anthony Chavez Message-ID: <20081013040937.GA8578@icarus.home.lan> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Cc: freebsd-questions@freebsd.org Subject: Re: RAID migration 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: Mon, 13 Oct 2008 04:09:40 -0000 On Sun, Oct 12, 2008 at 07:10:31PM -0600, Anthony Chavez wrote: > Dear freebsd-questions, > > I have a HighPoint 1820 RAID controller that is using 1 channel for an > OS drive and 3 channels for a RAID-5 array. I'm interested in migrating > to a new (possibly non-HighPoint) card, and am wondering if I will be > able to plug the OS drive into one channel on the new card and have it > "just work." Is it a safe bet that it will? It "probably" will work, assuming that the OS disk is not configured as a RAID or array member in the RAID cards' BIOS. Meaning, if you're using the disk on the controller purely in a "JBOD" fashion, yes, it should work. > I'm curious to know if the array could be migrated just as easily, or if > I should listen to my instinct and count on bumping into > incompatibilities due to proprietary implementations. I can absolutely guarantee you that you will lose access to all of your data once you plug those 3 disks into another controller. You need to back up all of your data from the RAID-5 array using something like rsync, cpdup, or dump, move the disks over to the non-RAID controller, format them (in whatever fashion you want), and then restore the backup. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |