From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id k0VMTS124183 for ; Tue, 31 Jan 2006 17:29:28 -0500 Received: from percy.comedia.it (percy.comedia.it [212.97.59.71]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id k0VMTJvE018887 for ; Tue, 31 Jan 2006 17:29:20 -0500 Date: Tue, 31 Jan 2006 23:29:18 +0100 From: Luca Berra Subject: Re: [linux-lvm] Mirror with G2U or LVM? Message-ID: <20060131222918.GG4335@percy.comedia.it> References: Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" Content-Transfer-Encoding: 7bit To: linux-lvm@redhat.com On Tue, Jan 31, 2006 at 03:52:31PM -0600, Don Shesnicky wrote: > >I'm looking to mirror 2 root drives right down to the MBR so I can >boot off either one in the event of a failure. Can this be done with >LVM or should I use something like G4U and update during shutdowns. i don't know what G2U is and google does not help. if i were in you i'd read the fine linux-raid HOWTO http://www.tldp.org/HOWTO/Software-RAID-HOWTO.html you don't need to mirror the mbr, just be sure to copy it over whenever you change it. (if you use grub to boot, it never changes, just install grub on both MBR the first time. If you use lilo there is a 'raid-extra-boot' configuration command that allows for updating both MBRs) >I'm using RHEL4 ES. RHEL4 should support root disk mirror at install time. >The drives are different sizes 160 gig and a 200 gig is that an issue? no, but the remaining 40 gig in the biggest disk will not be mirrored. -- Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \