From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.server123.net (Postfix) with ESMTPS for ; Wed, 10 Sep 2014 04:01:26 +0200 (CEST) Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XRXCt-00016b-Ln for dm-crypt@saout.de; Wed, 10 Sep 2014 04:00:27 +0200 Received: from c-24-14-20-249.hsd1.il.comcast.net ([24.14.20.249]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 10 Sep 2014 04:00:27 +0200 Received: from rnicholsNOSPAM by c-24-14-20-249.hsd1.il.comcast.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 10 Sep 2014 04:00:27 +0200 From: Robert Nichols Date: Tue, 09 Sep 2014 20:59:03 -0500 Message-ID: References: <20140909215203.GG26856@markov.biostat.ucsf.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit In-Reply-To: <20140909215203.GG26856@markov.biostat.ucsf.edu> Subject: Re: [dm-crypt] expanding encrypted volume/growing the volume List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dm-crypt@saout.de On 09/09/2014 04:52 PM, Ross Boylan wrote: > The FAQ advises wipeing it, though the > only explicit reasons seem not much of a concern for space in a volume > group (but later there are references to attacks available if the > attacker can determine which sectors are unused). As far as I know > there is no way to access the unused area of the volume group ... Easy. Create a new LV in that VG and use "--extents 100%FREE" as its size. Fill that LV with whatever variety of random data you choose, then delete that LV and use the space to expand your active LV. -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.