From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: EXT4 Larger Than 16TB Date: Sun, 21 Jul 2013 15:47:04 -0700 Message-ID: <51EC64E8.8090509@zytor.com> References: <20130709021403.GC6000@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "Theodore Ts'o" , linux-ext4@vger.kernel.org To: Michael Return-path: Received: from terminus.zytor.com ([198.137.202.10]:37307 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751253Ab3GUWr1 (ORCPT ); Sun, 21 Jul 2013 18:47:27 -0400 In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On 07/09/2013 06:45 AM, Michael wrote: > No problem, it sounds like it would be a very tricky bit of code to > write. Shuffling metadata blocks is not an easy feat. > > Is there any way to tell if I'm using 64 bit? Ubuntu defaults to > setting ext4 to default, but I don't know if it did when I first > created this FS. > > If it is 64 bit, the resize2fs utility should be able to handle this > one kernels >3.7, correct? > Is there a way to force this at mkfs time? I.e. "I know I may want to expand this filesystem beyond the 16 TB point?" -hpa