[dm-crypt] migrate luks key-slots to another luks container

Arno Wagner arno at wagner.name
Wed Jan 16 22:54:02 CET 2013

On Wed, Jan 16, 2013 at 10:29:31PM +0100, Alexander 'Leo' Bergolth wrote:
> Am 16.01.2013 22:08, schrieb Arno Wagner:
> >Ah, that makes sense. However, do you actually need this
> >alignment? If yor filesystem has, say, 4kB blocks and your
> >stripe-size is a multiple of that, it will be aligned anyways.
> Unfortunately this isn't easy to achieve if you are using raid5 or 6.
> I am moving to a raid6 with 5 disks using 64k chunksize. 64k chunks
> multiplied by the number of data bearing disks (3) results in a
> stripe width of 192k (=384 blocks). Thus I guess I should use
> --align-payload=384. The current setting is different and even the
> default of 1MiB isn't a multiple of that value.
> Anyway, is the migration of keyslots possible in my case?

As Milan said, no.

Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno at wagner.name
GnuPG: ID: CB5D9718  FP: 12D6 C03B 1B30 33BB 13CF  B774 E35C 5FA1 CB5D 9718
One of the painful things about our time is that those who feel certainty
are stupid, and those with any imagination and understanding are filled
with doubt and indecision. -- Bertrand Russell

More information about the dm-crypt mailing list