>The disk storage pool DIRPOOL for the directory information with the capacity 
>of
>1 MB does not fill on backup.
>Pct. Util. is 0.4% and does not change.
...
>On restore the corresponding volume (/dirpool/dir02.dsm) can be set off-line,
>nevertheless the restore is terminated successfully.

Carsten - Two issues are at play here...

1. In that there is data in the DIRPOOL already indicates that you performed a
   prior incremental backup of some kind which put something there.  We don't
   know what did it: if you do a Query CONtent for the volume, that should
   tell you.  Now, on normal incremental backups, there is no need to back up
   unchanged directories a second time, and indeed you would not want your
   server being bloated that way.  So the content of DIRPOOL would not change.
2. You didn't indicate what kind of clients are being backed up.  Remember
   that client types having simple directory structures can have the directory
   information stored entirely as *SM database entries: the directory storage
   pool is unnecessary and is unused.  Unix clients are this way.

 Richard Sims, BU