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 (8.12.11.20060308/8.12.11) with ESMTP id k8KEmVBa011051 for ; Wed, 20 Sep 2006 10:48:31 -0400 Received: from zeus.itg.uiuc.edu (zeus.itg.uiuc.edu [130.126.126.162]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id k8KEmMeH022217 for ; Wed, 20 Sep 2006 10:48:22 -0400 Received: from zeus.itg.uiuc.edu (localhost.localdomain [127.0.0.1]) by zeus.itg.uiuc.edu (8.13.1/8.13.1) with ESMTP id k8KEmLuT025596 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 20 Sep 2006 09:48:21 -0500 Received: from localhost (alazarev@localhost) by zeus.itg.uiuc.edu (8.13.1/8.13.1/Submit) with ESMTP id k8KEmLGM025593 for ; Wed, 20 Sep 2006 09:48:21 -0500 Date: Wed, 20 Sep 2006 09:48:21 -0500 (CDT) From: Alexander Lazarevich Subject: Re: [linux-lvm] LVM on RAID In-Reply-To: <1158760524.26653.4.camel@merlin.Mines.EDU> Message-ID: References: <1158603016.7182.12.camel@localhost.localdomain> <450EEEA0.7020703@mdmiller.com> <1158606792.7182.15.camel@localhost.localdomain> <1158607438.19905.30.camel@bounty.rider.geekspirit.net> <1158608077.7182.18.camel@localhost.localdomain> <1158608557.19905.37.camel@bounty.rider.geekspirit.net> <1158609135.7182.21.camel@localhost.localdomain> <1158609477.19905.38.camel@bounty.rider.geekspirit.net> <1158760524.26653.4.camel@merlin.Mines.EDU> MIME-Version: 1.0 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: LVM general discussion and development I should have been more clear. I'm not worried about LVM on one RAID. My questions is specifically about creating an LVM volume group ACROSS two RAID's. For example, we have a 64bit linux server, with two different RAID devices attached to the host via Fiber. These RAID's are each 4TB volumes. The RAID is attached as /dev/sda and /dev/sdb. What I'm asking about is creating a LVM volume group, and joining /dev/sda AND /dev/sdb to that same volume group, creating the lv of 8TB (minus overhead of course), and then creating a filesystem on that lv. A 8TB filesystem, which is spanned (via LVM) across both RAID's. Does anyone here do that? Reading all the reply's I realize I wasn't clear enough about that, and neither was anyone's responses. Alex On Wed, 20 Sep 2006, Matthew B. Brookover wrote: > I have used LVM on top of software raid and ISCSI. It works well. It > also helps keep track of what device is where. ISCSI does not export > its targets in the same order, some times sdb shows up as sdc.... LVM > will keep track of what is what. > > Matt > > On Tue, 2006-09-19 at 16:53 -0500, Alexander Lazarevich wrote: > >> We have several RAID devices (16-24 drive Fiber/SCSI attached RAID) which >> are currently single devices on our 64bit linux servers (RHEL-4, core5). >> We are considering LVM'ing 2 or more of the RAID's into a LVM group. I >> don't doubt the reliability and robustness of LVM2 on single drives, but I >> worry about it on top of RAID devices. >> >> Does anyone have any experience with LVM on to of RAID volumes, positive >> or negative? >> >> Thanks, >> >> Alex >> >> _______________________________________________ >> linux-lvm mailing list >> linux-lvm@redhat.com >> https://www.redhat.com/mailman/listinfo/linux-lvm >> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ >