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 i3LJRqp04653 for ; Wed, 21 Apr 2004 15:27:52 -0400 Received: from behemoth.sci.local (e2hst160.csg.stercomm.com [204.214.2.160]) by mx3.redhat.com (8.12.10/8.12.10) with ESMTP id i3LJRnMc012926 for ; Wed, 21 Apr 2004 15:27:49 -0400 Received: from stercomm.com (localhost [127.0.0.1]) by behemoth.sci.local (Postfix) with ESMTP id 8C3FAA2A for ; Wed, 21 Apr 2004 14:27:43 -0500 (CDT) Message-ID: <4086CB2E.8020001@stercomm.com> Date: Wed, 21 Apr 2004 14:27:42 -0500 From: Chris Cox MIME-Version: 1.0 Subject: Re: [linux-lvm] About Extending LVM size with Hardware Raid References: <200404211908.i3LJ82cJ003525@smtp.doruk.net.tr> In-Reply-To: <200404211908.i3LJ82cJ003525@smtp.doruk.net.tr> Content-Transfer-Encoding: 7bit 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" To: LVM general discussion and development Vahric MUHTARYAN wrote: > Okey you mean create a new raid5 with new disks and add it to volume > group okey you right . > > But My question is , Think that I have raid5 array with 3 disk ( I'm > using ICP Raid controller card ) then I add 4.th disk to my raid array ( I > know clearly that I can extend raid5 ) at this I have more disk space but I > have to intorduce it to system , and I can't imagine How ?! it's easy if I > have free partiton but I can't show this extended array like a free > partition :( If you truly can "extend raid5", you have a totally different disk essentially. It's nice that you have a HW raid that allows you to extend RAID 5 (an icky mess for sure.. probably takes a while to do the reshuffling). I don't know how to tell LVM that the disk itself has actually gotten bigger. Interesting problem, I doubt there's an answer for this though (but I could be wrong). I think if I wanted an extensible array setup, I would consider just aggregating a set of mirror'd drives into a volume group. That way, I could just add two more disks, create a new hw logical raid 1 drive, and add that to my volume group. Something I will consider doing.