General question

Hi

I made today a backup of a new client Unix with Tsm client version 5.2.0 on Tsm 
server version 5.2.3 to disk, here the output: 

1/04/2004 10:52:15  ANE4952I (Session: 8889, Node: CONSTRUCT)  Total number of
                     objects inspected:  169,203 (SESSION: 8889)
1/04/2004 10:52:15  ANE4954I (Session: 8889, Node: CONSTRUCT)  Total number of
                     objects backed up:  169,194 (SESSION: 8889)
1/04/2004 10:52:15  ANE4961I (Session: 8889, Node: CONSTRUCT)  Total number of
                     bytes transferred: 14.14 GB (SESSION: 8889)

The bytes transferred was 14.14GB. I run a migration to tape, here the output

11/04/2004 11:19:57  ANR0986I Process 421 for MIGRATION running in the
                      BACKGROUND processed 153096 items for a total of
                      8,910,381,056 bytes with a completion state of SUCCESS at
                      11:19:57. (PROCESS: 421)

As you see the migration moved  8,910,381,056 bytes , when I run a sql query to 
see the  node occuapancy as:

select node_name,sum(physical_mb) as "Occupancy" from occupancy group by 
node_name order by 2

I got the same result as the migration:     CONSTRUCT                 8493.12

It's the hardware compress to make this difference between the backup result to 
the data store on the tape  ???????????

Regards Robert Ouzen
E-mail:  rouzen AT univ.haifa.ac DOT il