Re: [gentoo-user] Encrypting removable media

[Etaoin Shrdlu <shrdlu@unlimitedmail.org>]

On Friday 24 February 2006 15:18, Matthias Bethke wrote:

> I have a bit of chicken-and-egg problem trying to get encrypted
> removable devices to work as "normal" as possible.
> Using Loop-AES and a GPG-encrypted key I had no problems encrypting my
> external FW drive, but to pass all the options to losetup without
> entering them by hand every time, I need an fstab entry. The drive
> shows up as /dev/sda, but putting /dev/sda1 there is no good as it
> would try to use Loop-AES on *every* external drive. So far I could
> just use volume labels in my fstab to distinguish any number of
> drives---well, I used to until hald/dbus made that automatic. But now
> there are no labels any more as they get encrypted as well.
> Has anyone come up with a solution for this yet? I could imagine some
> plugin for the hotplug system that checks /proc/scsi/scsi for a
> certain model before mounting. Not the cleanest solution either but as
> my external drives are different models it would work for me. I don't
> have much of a clue about the hotplug system though...

With udev you can create hardware-specific devices (meaning you can have 
a device in /dev that corresponds exactly to some particular hard disk), 
based on various hardware-specific information (eg, manufacturer name or 
device id and many others) See 
http://www.reactivated.net/writing_udev_rules.html
for the details.
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