From owner-freebsd-questions@FreeBSD.ORG Thu Jul 24 02:19:52 2014 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9C4A9B2A for ; Thu, 24 Jul 2014 02:19:52 +0000 (UTC) Received: from bewilderbeast.blackhelicopters.org (mwlucas-2-pt.tunnel.tserv9.chi1.ipv6.he.net [IPv6:2001:470:1f10:b9c::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 62E5C248D for ; Thu, 24 Jul 2014 02:19:51 +0000 (UTC) Received: from bewilderbeast.blackhelicopters.org (localhost [127.0.0.1]) by bewilderbeast.blackhelicopters.org (8.14.9/8.14.9) with ESMTP id s6O2JVDs025561 for ; Wed, 23 Jul 2014 22:19:50 -0400 (EDT) (envelope-from mwlucas@bewilderbeast.blackhelicopters.org) Received: (from mwlucas@localhost) by bewilderbeast.blackhelicopters.org (8.14.9/8.14.7/Submit) id s6O2JVNF025560 for questions@freebsd.org; Wed, 23 Jul 2014 22:19:31 -0400 (EDT) (envelope-from mwlucas) Date: Wed, 23 Jul 2014 22:19:31 -0400 From: "Michael W. Lucas" To: questions@freebsd.org Subject: gpart resize problem Message-ID: <20140724021931.GA25549@bewilderbeast.blackhelicopters.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (bewilderbeast.blackhelicopters.org [127.0.0.1]); Wed, 23 Jul 2014 22:19:50 -0400 (EDT) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Jul 2014 02:19:52 -0000 Hi, I am utterly perplexed by how gpart resize behaves, and beseech you for enlightenment. I'm running: # uname -a FreeBSD storm 11.0-CURRENT FreeBSD 11.0-CURRENT #6 r269010: Wed Jul 23 11:13:17 EDT 2014 mwlucas@storm:/usr/obj/usr/src/sys/GENERIC amd64 I have empty space on disk da0, right next to partition 6. # gpart show da0 => 40 1953525088 da0 GPT (932G) 40 1024 1 freebsd-boot (512K) 1064 984 - free - (492K) 2048 16777216 2 freebsd-swap (8.0G) 16779264 10485760 3 freebsd-ufs (5.0G) 27265024 10485760 4 freebsd-ufs (5.0G) 37750784 104857600 - free - (50G) 142608384 1810916744 6 freebsd-ufs (864G) I want to expand partition 6. # gpart resize -i 6 -a 4k da0 da0p6 resized # gpart show da0 => 40 1953525088 da0 GPT (932G) 40 1024 1 freebsd-boot (512K) 1064 984 - free - (492K) 2048 16777216 2 freebsd-swap (8.0G) 16779264 10485760 3 freebsd-ufs (5.0G) 27265024 10485760 4 freebsd-ufs (5.0G) 37750784 104857600 - free - (50G) 142608384 1810916744 6 freebsd-ufs (864G) That's really weird. Maybe I can't expand a partition backwards? # gpart resize -i 4 -a 4k -s 10G da0 da0p4 resized # gpart show da0 => 40 1953525088 da0 GPT (932G) 40 1024 1 freebsd-boot (512K) 1064 984 - free - (492K) 2048 16777216 2 freebsd-swap (8.0G) 16779264 10485760 3 freebsd-ufs (5.0G) 27265024 115343360 4 freebsd-ufs (55G) 142608384 1810916744 6 freebsd-ufs (864G) Wait! I said 10G, not 55G! Can I shrink this partition back down? # gpart resize -i 4 -a 4k -s 5G da0 da0p4 resized # gpart show da0 => 40 1953525088 da0 GPT (932G) 40 1024 1 freebsd-boot (512K) 1064 984 - free - (492K) 2048 16777216 2 freebsd-swap (8.0G) 16779264 10485760 3 freebsd-ufs (5.0G) 27265024 10485760 4 freebsd-ufs (5.0G) 37750784 104857600 - free - (50G) 142608384 1810916744 6 freebsd-ufs (864G) Yes, I can make it return to 5G. Trying to make da0p4 grow by only a few GB makes the partition pop up to 55GB. I can then shrink it to the desired size with a second change. Am I totally misunderstanding "gpart resize"? Thanks, ==ml -- Michael W. Lucas - mwlucas@michaelwlucas.com, Twitter @mwlauthor http://www.MichaelWLucas.com/, http://blather.MichaelWLucas.com/