hi Bruce,

migration *MOVES* your clients' data from a PRIMARY storage pool
to a NEXT PRIMARY storage pool, e.g. from DISK to a primary TAPE pool.

backup stgpool *COPIES* clients' data stored on a PRIMARY pool
to a COPY pool (that has to be SEQUENTIAL, i.e. a tape pool).

after the successful backup of a primary storage pool, you will have
2 copies of data on TSM server, and you can send the 2nd copy to an
off-site location (vault).

see:
  help migrate stg
  help backup stg

hope it helps.

regards
Gabriel Peter

On 1 Oct 2007, 18:35, Dollens, Bruce wrote:
> I have a question that I feel a little stupid in asking.
>
> What is the difference between migration and backup primary (disk) to
> copy (tape)?
>
> I am working on changing my scheduling up and the recommended order of
> steps I was given is:
>
> Backup clients
> Migration
> Backup primary to copy
> Backup db
> Expiration
> Reclamation
> Start all over again
>
> Thanks!