The OSMC shelf manager expires rewritable optical platters that are assigned to the Object or Object Backup storage group when valid data no longer exists on either side of the platter. The OSMC shelf manager expires WORM optical platters that are assigned to the Object or Object Backup storage group when both sides of the platter have been marked full, but no valid data exists on either side of the platter.

Rewritable optical volumes: You can specify how OAM processes rewritable optical cartridges that have expired. These volumes are either retained in the current Object or Object Backup storage group, or returned to OAM scratch status.

WORM optical volumes: Because WORM optical media cannot be reclaimed, all knowledge of a WORM cartridge is removed from the OAM inventory when the cartridge expires. If the WORM volume is in an optical library, it is ejected from the library. The volume records are removed from the OAM VOLUME table. OAM writes message CBR2153I to the hardcopy log that indicates which optical volumes have expired. You can dispose of the WORM optical volume according to your installation's regulations.

Perform the following steps to set up optical volumes for expiration processing:

1. Use the SETOPT OPTICALREINITMODE statement in the CBROAMxx member of PARMLIB to specify how OAM manages expired optical volumes.
   • Specify the GROUP parameter to leave expired rewritable optical volumes in the currently assigned Object or Object Backup storage group.
   • Specify the OAMSCRATCH parameter to return expired rewritable optical volumes to the *SCRTCH* storage group to be available for use by any Object or Object Backup storage group.

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2. In the management class, specify the following expiration criteria for the objects that reside on optical volumes:
   • Retention Limit
   • Expire After Days Non-Usage
   • Expire After Date/Days
   • RETPD/EXPDT

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3. The OSMC cycle expires optical volumes that belong to Object or Object Backup storage groups. If the expiration date for a volume is reached and no active objects exist on the volume, OSMC expires the volume.

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Result: Eligible rewritable optical platters in the Object or Object Backup storage group, which have expiration dates of less than today and have no more active objects, are expired during the OSMC cycle. These expired rewritable volumes are recycled based on the criteria that is specified in the SETOPT OPTICALREINITMODE statement. Eligible WORM optical platters in the Object or Object Backup storage group, which have expiration dates of less than today, have no more active objects, and have been marked full. These volumes are expired during the OSMC cycle. These expired WORM volumes are removed from the OAM volume inventory.