>2. The operations staff has managed to loose one of our tape volumes - a this
>minute they are looking for it feverishly.   We don't know how it got ou of
>the silo, but it did - probably ran away to a warmer climate!  :-)  At ay
>rate, we have not implemented a backup plan yet, and so had no copy of te
>tape.  In looking through the manuals I came across several appropriate
>discussions on how to recover if I had planned ahead, and discussions onhow
>to mark a tape as "destroyed", but I can't find any reference to what prcessi
>ng occurs after it is marked as such.  What I would like to have happen s
>that all of the associated data base entries for the files on the
>lost/destroyed tape would be either removed or marked as invalid.  Then,at
>the next incremental backup, a new backup would be taken, even though tothe
>end user, the file had not been changed.  Of course, any older copies of
>files, or "only" copies of deleted files would be lost.  Is this what hapens,
>or is it something else?

You can accomplish what you describe without planning ahead.  If you
are convinced that the volume is gone for good, use the DELETE VOLUME
command with DISCARDDATA=YES to remove information about the lost
volume, and any files stored on that volume, from the database.
The next time the client performs an incremental backup, any backup
files stored on the deleted volume will be backed up again, provided
that they still exist on the client workstation.  Of course, this
won't get back any files that have been erased or modified on the
client workstation.

However the new copy storage pool functions introduced in V2
go well beyond this.  Very briefly, these functions allow you
to create duplicate copies of files in a copy storage pool.  If
you loose one or more volumes in the primary pool, you can mark
these volumes as "destroyed" and any attempts to access files
on the destroyed volumes will automatically be satisfied by
obtaining the files from a copy storage pool.  Also, you can
restore the destroyed volumes from the copy storage pool.

For more information see the V2 Admin Guide, especially the chapters
on Managing Storage Pools, Managing Storage Pool Volumes, and
Recovering Data.  You should also read about the BACKUP STGPOOL,
RESTORE STGPOOL, and RESTORE VOLUME commands in the V2 Admin Reference.

Dave Cannon
ADSM Development