From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.12.11.20060308/8.11.6) with ESMTP id k2SJNP8U026132 for ; Tue, 28 Mar 2006 14:23:25 -0500 Received: from fedex.ist.ucf.edu (fedex.ist.ucf.edu [132.170.193.23]) by mx1.redhat.com (8.12.11.20060308/8.12.11) with ESMTP id k2SJNOdn002881 for ; Tue, 28 Mar 2006 14:23:24 -0500 Received: from [132.170.193.212] (wks212.ist.ucf.edu [132.170.193.212] (may be forged)) by fedex.ist.ucf.edu (8.13.1/8.12.8) with ESMTP id k2SJNiKp016990 for ; Tue, 28 Mar 2006 14:23:45 -0500 Message-ID: <44298C92.90206@ist.ucf.edu> Date: Tue, 28 Mar 2006 14:20:50 -0500 From: Judd Tracy MIME-Version: 1.0 Subject: Re: [linux-lvm] LVM2 with disks greater than 2TB References: <44286D9D.405@the-rusty-nail.com> <442885D1.5070509@volved.com> <44297A4A.7070909@the-rusty-nail.com> In-Reply-To: <44297A4A.7070909@the-rusty-nail.com> 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 I recall having a similar problem when I setup a large array a long time ago and it was related to the partition table if I remember correctly. I wish I could remember more, but that was atleast 2 years ago. Hopefully it can lead you in the right direction. I think I ended up using and EFI partion table if I remember correctly. Judd Dan wrote: > What concerns me is if I just try and make a single 4.54TB partition > as reiserfs without using LVM2 and mount it, it still only shows up as > ~560GB using df -h. This makes me think it maybe an os issue. Any > thoughts? > > Barnaby Claydon wrote: > >> Dan wrote: >> >>> I have 24 - 500GB drives raided such that 11 drives + 1 hot spare >>> per raid to get 4.54TB times 2. I want to use LVM2 to make this >>> into one ~9TB disk, but when I create the partitions and do a df -h >>> they show up as about 560GB each instead of 4.5TB each. I do an >>> fdisk -l and they show up correctly. I am using Slackware 10.0. I >>> have device-mapper and LVM2 correctly installed. I am obviously >>> hitting a 2TB limit from what I have read, but does anyone know if >>> it is possible to even do what I want? If so, any suggestions on >>> what I need to install to get this to work? I am running the >>> 2.6.15.4 kernel. Thanks >>> >> Dan, from the LVM2 FAQ ( >> http://www.tldp.org/HOWTO/LVM-HOWTO/lvm2faq.html ) it mentions: >> >> * For 32-bit CPUs on 2.6 kernels, the maximum LV size is 16TB. >> * For 64-bit CPUs on 2.6 kernels, the maximum LV size is 8EB. (Yes, >> that is a very large number.) >> >> From what I recall when I built my last LVM, it's a matter of setting >> the PE size during creation (hopefully you haven't started filling >> with data yet). I think the default causes you to hit the 2TB limit, >> but it can definitely be set higher. The default PE Size seems to >> depend on Linux distribution, but mine is at 4MB and I'm at 1.5TB >> right now so the references to a 32MB default would definitely get >> you to 9TB. >> >> Sorry I can't offer any other specifics - hope that helps. >> >> -Barnaby >> >> >> _______________________________________________ >> 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/ > > > _______________________________________________ > 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/ -- Judd Tracy University of Central Florida Institute for Simulation and Training jtracy@ist.ucf.edu 407-882-1479