From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o2PNr1fF173249 for ; Thu, 25 Mar 2010 18:53:02 -0500 Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id AD1D927917A for ; Thu, 25 Mar 2010 16:54:37 -0700 (PDT) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id k5im9C1vlGRmqfEP for ; Thu, 25 Mar 2010 16:54:37 -0700 (PDT) Date: Fri, 26 Mar 2010 10:54:33 +1100 From: Dave Chinner Subject: Re: 128TB filesystem limit? Message-ID: <20100325235433.GM3335@dastard> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: david@lang.hm Cc: xfs@oss.sgi.com On Thu, Mar 25, 2010 at 04:15:42PM -0700, david@lang.hm wrote: > I'm working with a raid 0 (md) array on top of 10 16x1TB raid 6 > hardware arrays. > > fdisk -l shows me 10 drives like > > WARNING: GPT (GUID Partition Table) detected on '/dev/sdk'! The util > fdisk doesn't support GPT. Use GNU Parted. > > > Disk /dev/sdk: 13999.9 GB, 13999999025152 bytes > 255 heads, 63 sectors/track, 1702069 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > Disk identifier: 0x00000000 > > Device Boot Start End Blocks Id System > /dev/sdk1 1 267350 2147483647+ ee EFI GPT > > and then the md0 device as > > Disk /dev/md0: 139999.9 GB, 139999989596160 bytes > 2 heads, 4 sectors/track, -1 cylinders > Units = cylinders of 8 * 512 = 4096 bytes > Disk identifier: 0x00000000 > > Disk /dev/md0 doesn't contain a valid partition table > > > I then did mkfs.xfs /dev/md0 > > but a df is showing me 128TB What is in /proc/partitions? > is this just rounding error combined with the 1000=1k vs 1024=1k > marketing stuff, Probably. > or is there some limit I am bumping into here. Unlikely to be an XFS limit - I was doing some "what happens if" testing on multi-PB sized XFS filesystems hosted on sparse files a couple of days ago.... Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs