Re: Hosed encrypted drive. Is disaster recovery possible?

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On 08/02/2010 10:38 AM, Willie wrote:
> I still have
> "/dev/mapper/udisks-luks-uuid-c1a534b4-d1ba-40d0-adb8-6d2490f06ade-uid9330
> on /media/Seagate_1.5 type xfs (rw,nosuid,nodev,uhelper=udisks)", and
> obviously I have the pass phrase.

If you have live mapping still, you are not lost completely yet.
Do not reboot! First run "dmsetup table --showkeys" and "dmsetup info -c"
and store the full mapping to some file.

If you see dm-crypt mapping there mapped to proper drive, you can still recreate
LUKS header with some some magic.

(If you have saved that dmsetup mapping, I'll describe hot to save you data
- still depends how many of fs was overwritten.)

If you want help with that, paste here "dmsetup table" (*without* using --showkeys,
we do not want see your master key:-). For recovery you will need to know that key,
so be sure you have full table with key stored as written above.

(Table is created according to LUKS header which is lost, so after reboot you are
lost completely. BTW Passphrase will not help here at all.)

Milan
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