hey selim, On 21/02/2010 Selim Levy wrote: > On 21 February 2010 12:10, Bryan Kadzban <bryan.kadzban@xxxxxxxxx> wrote: > > Doesn't Debian's initramfs bring up udev and let you use the > > /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? yon can use "UUID=..." instead of the device path both in /etc/fstab and 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. greetings, jonas
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