geli - changing keyfile

[Wojciech Puchar]

>> password.
>
> I've never had cause to do this, but it would be done with geli setkey.
>
> Note that if an attacker has a copy of either the geli metadata sector
> or a geli metadata back-up file, the old key-file can still be used to
> access your data.
nobody have my keyfiles.

i just moved disk to other server and want them use the same keyfile than 
other disks