That help was invaluable. Thanks a ton.
hey selim,
On 21/02/2010 Selim Levy wrote:
> On 21 February 2010 12:10, Bryan Kadzban <bryan.kadzban@gmail.com> wrote:
> > Doesn't Debian's initramfs bring up udev and let you use theyon can use "UUID=..." instead of the device path both in /etc/fstab and
> > /dev/disk/by-*/ symlinks in crypttab? That's a *LOT* better way to find
> > this drive (in your case, by-id might work, and by-uuid will almost
> > definitely work, assuming a new-enough udev that can find the UUID of a
> > LUKS volume). Maybe poke around in /dev/disk when you're at the busybox
> > prompt, and see what you can find.
> > (If it doesn't bring up udev and let you use those symlinks, then ...
> > why not? :-P Not a question for you obviously, but more for the Debian
> > maintainers.)
> >
> > Anyway, then you don't care which sd* name is given to this device,
> > since you're using an explicitly-guaranteed-stable name for it.
> >
>
> Hmmmm.... that's really interesting. I played around at the busybox prompt
> and took down all the info in the /dev/disk/by-* directories (which do get
> created). I redirected output of 'ls -alF' commands from those directories
> to file and have the info available to me.
>
> So here's what I've now confirmed:
> When I boot into my main/internal hd, /dev/sda, sdb and sdc are the
> following: internal hd, cardreader, external hd (respectively).
> When I boot into my rescue/external system, they are the following: internal
> hd, external hd, cardreader.
>
> How do I go about using the /dev/disk/by-* devices with dm-crypt? Does it
> only require modifying, as before, /etc/fstab and /proc/cmdline? Or is
> there something else I should play around with?
in /etc/crypttab. for example:
/etc/fstab:
UUID=9385bada-5c09-a303-ee31-4fd23452af29 / ext3 errors=remount-ro 0 1
/etc/crypttab:
sdb3_crypt UUID=35bc3457-127a-4344-80bf-6cdfff232339 none luks
/proc/cmdline:
BOOT_IMAGE=/vmlinuz-2.6.26-1-amd64 root=/dev/mapper/rescue-rooto ro
you need to substitute the UUID in /etc/fstab with the UUID of
/dev/mapper/rescue-rooto, and the UUID in /etc/crypttab with the one of
/dev/sdb3.