On Mar 12, 2008, at 7:09 PM, Mario Behring wrote:

...There is this customer that have a business requirement of FULL
backup every day with a 30 days retension period. ....

Beware customers who specify a backup requirement and nothing else.
Those are customers who haven't thought things through and who need
the guidance of a storage technologist.  Explore their needs with
them, in order to come up with a data preservation plan which
accommodates recovery, the final goal of backups.  They may actually
be driven by regulatory retention needs than recovery
considerations.  A daily image backup may meet their needs; or they
might need some kind of real-time backup which captures all business
transactions.  If ordinary needs, the TSM Archive facility may cover it.

    Richard Sims