How to label a GELI device
J. Porter Clark
jpc at porterclark.com
Tue Jan 25 14:07:12 UTC 2011
On Tue, Jan 25, 2011 at 10:45:52AM +0200, Nikos Vassiliadis wrote:
> J. Porter Clark wrote:
> > I have an encrypted partition, /dev/da0s1d. I can use geli
> > attach da0s1d and obtain a device /dev/da0s1d.eli, which is a
> > UFS filesystem. All that works just fine.
> > I'd like to label /dev/da0s1d so that I don't have to refer to
> > the exact drive number, etc., which might change if I reboot
> > with a USB stick in the system or whatever. But glabel puts the
> > label in the last sector, which is where GELI stores metadata.
> You don't have to worry about this. geli uses the last sector for
> its metadata and creates a device with one sector less to its clients.
> The original device is 2048 sectors, the device geli provides is 2047
> > moby# diskinfo /dev/md0 /dev/md0.eli
> > /dev/md0 512 1048576 2048 0 0
> > /dev/md0.eli 512 1048064 2047 0 0
> There is no way for the "internal" GEOM to mess with the "external's"
That's fine, but I want to label the "external" /dev/md0, not
the "internal" /dev/md0.eli.
What I eventually want to do is to "geli attach" the device
using a name that doesn't depend on drive numbering.
J. Porter Clark <jpc at porterclark.com>
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