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Re: Tarsnap and hard disk swap





On 25 February 2016 at 14:52, Colin Percival <cperciva@tarsnap.com> wrote:
On 02/24/16 15:34, Nicholas Lee wrote:
> On 25 February 2016 at 09:13, Colin Percival <cperciva@tarsnap.com
> <mailto:cperciva@tarsnap.com>> wrote:
>     On 02/23/16 08:10, John Gamble wrote:
>     > 2).  Instead of simply copying across some files to the new hard disk, as
>     > mentioned above, would it be better, from a backup point of view, to copy
>     > across my entire /home directory to the new disk, rather than individual
>     > files?  (I'm currently running Linux, with my /home directory located on a
>     > separate disk partition from the operating system.)
>
>     Tarsnap doesn't care.  The deduplication will recognize duplicate data even if
>     files move around.
>
> Needs to be the same machine key though.

Right, I should have been clearer about that.  Every machine is its own
deduplication domain.

As far as I understand. If you migrate the private key, then you migrate this dedup domain.

In fact I think you can run the same key on different machines, but only if the tarsnap backend is not be used by the same key at the same time.

Nicholas