From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gabriel de Perthuis Subject: Re: Converting existing partition to bcache backing device without loss of data Date: Fri, 09 Aug 2013 03:00:32 +0200 Message-ID: <52043F30.5080401@gmail.com> References: <20130809003657.GF15409@kmo-pixel> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20130809003657.GF15409@kmo-pixel> Sender: linux-bcache-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Kent Overstreet , Adam Brenner Cc: linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-bcache@vger.kernel.org ven. 09 ao=C3=BBt 2013 02:36:57 CEST, Kent Overstreet a =C3=A9crit : > On Thu, Aug 08, 2013 at 09:27:33AM -0700, Adam Brenner wrote: >> Howdy, >> >> I am in the process of testing bcache on our HPC cluster to act as >> cache for our gluster storage (~750TB). >> >> I notice that during the setup process on our test cluster, our >> backing device (where all our data is stored) will need to be >> formatted in order to support bcache. >> >> Does a way exist so we do not have to format our backing device? Or = is >> working being done to support this? > > Unfortunately, there's no general purpose way - the faq explains why = (I > just fixed the wiki so it's there again :) > > http://bcache.evilpiepirate.org/FAQ/ > > However, Gabriel de Perthuis has a tool to do in place conversion - I > can't remember if it was limited to lvm devices or not - Gabriel, wha= t > was the link to that again? I should stick a link to it in the wiki o= r > give you an account on it so you can. Yup, here is my conversion tool: https://github.com/g2p/blocks I've added it to the FAQ.