From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from v1.tansi.org (mail.tansi.org [84.19.178.47]) by mail.server123.net (Postfix) with ESMTP for ; Sun, 18 Jun 2017 20:03:25 +0200 (CEST) Received: from gatewagner.dyndns.org (77-56-144-126.dclient.hispeed.ch [77.56.144.126]) by v1.tansi.org (Postfix) with ESMTPA id A694F140152 for ; Sun, 18 Jun 2017 20:03:09 +0200 (CEST) Date: Sun, 18 Jun 2017 20:03:24 +0200 From: Arno Wagner Message-ID: <20170618180324.GA12330@tansi.org> References: <15cb9f6bc21.e7fcdcb9152844.6693124782086296883@metempsy.com> <20170618154054.GA9525@tansi.org> <15cbc39b494.105b4f071169524.5476164598177432600@metempsy.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <15cbc39b494.105b4f071169524.5476164598177432600@metempsy.com> Subject: Re: [dm-crypt] help mounting partitions in an encrypted disk after first reboot List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dm-crypt@saout.de On Sun, Jun 18, 2017 at 19:21:57 CEST, Julio Gago wrote: > ---- On Sun, 18 Jun 2017 17:40:54 +0200 Arno Wagner wrote ---- > > Hi Julio, > > > > the partitions do not show up on reboot as the kernel cannot > > see them. The partition table it would need to scan is > > in the encrypted LUKS container and as that is still > > closed on boot, hence the kernel has no chance to look at it. > > > > A fix might be to just call "partprobe" after opening the > > LUKS container. That scans all reachable devices for > > partition tables. It also works directly after repartitioning, > > i.e. without a reboot. > > > > partptobe is part of the parted package (at least on Debian). > > Thanks Arno!!!! > > That fixed it!!!! > > I was so close to finding this :). I can see in my history that I tried > with "partx" (it does the same, in theory, or something similar in the > realm of my understanding) and that I did "man partprobe", probably saw it > in the "see also". > > I am wondering if we should add a section about this in the FAQ. Or maybe > this is not frequent enough? > > I volunteer myself to do the update to the FAQ if you guys want. > > Julio You are welcome. I think I will do an FAQ item on "Partitioning a LUKS container", that would also describe this effect and the need for partprobe or something like it. And yes, this is rare. I believe this is the first time somebody had this problem. Most people will use unpartitioned LUKS containers or use LVM. Regards, 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 If it's in the news, don't worry about it. The very definition of "news" is "something that hardly ever happens." -- Bruce Schneier