From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.saout.de ([127.0.0.1]) by localhost (mail.saout.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id StGmH4pGNugO for ; Sat, 1 Feb 2014 22:34:47 +0100 (CET) Received: from v6.tansi.org (ns.km31936-01.keymachine.de [87.118.116.4]) by mail.saout.de (Postfix) with ESMTP for ; Sat, 1 Feb 2014 22:34:46 +0100 (CET) Received: from gatewagner.dyndns.org (77-57-44-24.dclient.hispeed.ch [77.57.44.24]) by v6.tansi.org (Postfix) with ESMTPA id ADEE320DC239 for ; Sat, 1 Feb 2014 22:34:45 +0100 (CET) Date: Sat, 1 Feb 2014 22:34:44 +0100 From: Arno Wagner Message-ID: <20140201213444.GA6778@tansi.org> References: <52ED5E0B.3090300@mthode.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <52ED5E0B.3090300@mthode.org> Subject: Re: [dm-crypt] cryptsetup luksFormat with the size option List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dm-crypt@saout.de On Sat, Feb 01, 2014 at 21:50:19 CET, Matthew Thode wrote: > Am I correct in stating that setting --size=8 will make the sectors 4k > in size? Also, how can I check what existing luks volumes are set to? > > -- > -- Matthew Thode > No, you are not. As the man-page clearly states, this sets the size of the underlying device as multiple of 512B sectors. As item 2.17 of the FAQ states, LUKS does not have any issue with 4k sectors, as it does not split or re-arrange requests. I would strongly advise to read the documentation before trying to set up a LUKS volume. There are a number of less obvious pitfalls. Arno -- Arno Wagner, Dr. sc. techn., Dipl. Inform., Email: arno@wagner.name GnuPG: ID: CB5D9718 FP: 12D6 C03B 1B30 33BB 13CF B774 E35C 5FA1 CB5D 9718 ---- A good decision is based on knowledge and not on numbers. - Plato