I use DRM, but I augment the process significantly with the functions that
you need.

Basically, I first change all tapes that are currently created to a status
of "readonly" at a good time.  That good time may not be when the operators
are around to take the tapes out of the library.  This causes new backup stg
commands to start on new tapes.  The command for each volume:

Update volume <volume_name> access=readonly

You can use '*' for the volume_name if you just want to do them all and
these additional parameters
whereaccess=readwrite wherest=fil,ful wherestg=<stgpool_name>

Then, I run my move drmedia command to eject the tapes when the operators
are around to take them out of the IO station, but you can accomplish the
same thing with two commands:

Checkout libvolume <library_name> <volume_name> remove=yes (or as
appropriate for your library)
Update volume <volume_name> access=offsite

Unfortunately, the checkout command has to be issued for each volume on a
3494.  So you, you may want to just use a script with the volumes as
parameters.  Up to you.

You can use a select command to capture all of the volumes and create the
entire commands if you wish as follows:

Select 'update volume ', volume_name, ' access=reado' from volumes where
access ='READWRITE' and stgpool_name='YOURCOPYPOOL' > /temp/update.volumes

Then you have to strip off the first two lines of the output and you can run
it as a macro.

Macro /temp/update.volumes

Paul D. Seay, Jr.
Technical Specialist
Naptheon, INC
757-688-8180