From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38153) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VsaPW-0006V1-5K for qemu-devel@nongnu.org; Mon, 16 Dec 2013 10:48:54 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VsaPL-0007SM-3B for qemu-devel@nongnu.org; Mon, 16 Dec 2013 10:48:46 -0500 Received: from mail-ea0-x236.google.com ([2a00:1450:4013:c01::236]:57935) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VsaPK-0007S5-Sd for qemu-devel@nongnu.org; Mon, 16 Dec 2013 10:48:35 -0500 Received: by mail-ea0-f182.google.com with SMTP id a15so2316955eae.41 for ; Mon, 16 Dec 2013 07:48:33 -0800 (PST) Date: Mon, 16 Dec 2013 16:48:31 +0100 From: Stefan Hajnoczi Message-ID: <20131216154831.GA16756@stefanha-thinkpad.redhat.com> References: <20131216093735.6862.14254.malonedeb@soybean.canonical.com> <20131216093735.6862.14254.malonedeb@soybean.canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131216093735.6862.14254.malonedeb@soybean.canonical.com> Subject: Re: [Qemu-devel] [Bug 1261320] [NEW] Virtual Disk with over 16TB List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Bug 1261320 <1261320@bugs.launchpad.net> Cc: qemu-devel@nongnu.org On Mon, Dec 16, 2013 at 09:37:34AM -0000, Chris Weltzien wrote: > is there a option to create a disk for a vm with a size over 16TB. > > the problem that after the diskfile reach 16TB, the disk get a state of read-only at this limit. > I know, that 16TB file size is max, is there a option to create the disk in mutliple files? > we want to use 22 TB. in the VM Basically no, not in a clean way for a production VM. Can you attach multiple disks to the guest and then use software RAID0 or LVM to get a 22 TB device inside the guest? If not, here are some options: 1. Switch to a different file system (XFS is your best bet) 2. Use LVM (and get a slight performance boost for free!) 3. Tweak file system settings (e.g. bigger block size may allow larger files) Stefan