>Even better, directories are never stored in storagepools, just in the
>database, so in case of a disaster, you will never loose any data as long as
>you have off-site db backups.

True for simple directories, as found in Unix...same as empty files.
But the more complex ones (Unix ACLs, Windows) have more attributes than can
be accommodated in a TSM database entry so they have to be treated like
non-empty files, and thus are stored in storage pools.  This naturally
extends the length of backup and restore sessions for such systems.
Watching a substantial Unix restoral is beautiful, as all the directories
come back right away, reconstructing the framework of the file system area
long before any tape is mounted to restore data files.

  Richard Sims, BU