Mark,

No idea about TSM's LANFREE being a limited use copy of Sanergy.  My
understanding was that the big difference was in the client code so that
the meta data goes over the LAN to the TSM server's DB and the actual
backup data goes across the SAN directly to the SAN attached tape drive
with the TSM server still controlling the tape drive access.  I assumed
this was just a case of the TSM server telling the client which tape
drive to use and then the client sends the data to the SAN attached tape
drive in the same manner the TSM server normally sends data to a SAN
attached tape drive.  When the client completes the back-up, it informs
the TSM server and the server knows that the tape drive is now free for
other usage.

During IBM's presentation on tapeless back-ups they said that if you
where going the route of DASD storage using a FILE device class stgpool,
you would need the full blown Sanergy application to do a LANFREE
back-up.  I would assume that this meant at least two copies of Sanergy,
one for the TSM server and one for the client.

For back-ups I would prefer to use the simplest method which would seem
to be TSM's LANFREE technology.  I do not want to have to worry about
compatible versions between two different products [TSM and Sanergy, not
mention the OS(s)] even when both of the products are from IBM.

H. Milton Johnson