Date: Tue, 25 Jan 2011 12:37:09 -0600 From: "J. Porter Clark" <jpc@porterclark.com> To: freebsd-questions@freebsd.org Subject: Re: How to label a GELI device Message-ID: <20110125183709.GA22024@auricle.charter.net> In-Reply-To: <4D3F1649.9000608@lazlarlyricon.com> References: <20110125014223.GA13385@auricle.charter.net> <4D3E8DC0.9060605@gmx.com> <20110125140705.GA20041@auricle.charter.net> <4D3EDE51.6070404@lazlarlyricon.com> <20110125181339.GA21203@auricle.charter.net> <4D3F1649.9000608@lazlarlyricon.com>
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On Tue, Jan 25, 2011 at 07:28:25PM +0100, Rolf Nielsen wrote: > X-Spam-Level: > > 2011-01-25 19:13, J. Porter Clark skrev: > > On Tue, Jan 25, 2011 at 03:29:37PM +0100, Rolf Nielsen wrote: > >> > >> Correct me if I'm wrong anyone. > >> You need to first label da0s1d > >> > >> e.g. like so > >> > >> glabel label data da0s1d > >> > >> then geli init the labeled device > >> > >> e.g. like so > >> > >> geli init -l 256 -s 4096 label/data > > > > Unfortunately, this step overwrites the label. > > It does not. I just tested it with a file backed md device, and > hexdumped it after each step (creating the file, mdconfig it, label the > md device and encrypting it). > After the first two steps, I got just zeros, after labeling it, I got > the last sector containing the label, and after encrypting it, I got the > second last sector (i.e. the last sector of the labeled device) > containing the eli data and the last secor still containing the label. > > If it does overwrite the label, you most likely specified the da0s1d to > the geli init command. You need to specify label/data (replace "data" > with the name you choose). Ah! That is, in fact, exactly what I did. I didn't realize that the glabeled device was actually shrunk by 1 sector. Thanks! -- J. Porter Clark <jpc@porterclark.com>
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