When defining an object backup storage group, you can specify up to eight real optical libraries or up to eight pseudo optical libraries.

OAM stores the backup copy or copies of the object using any optical drive and optical volume that is associated with any one of the optical libraries listed in the object backup storage group definition.

If no tapeunitname is specified in the CBROAMxx member of PARMLIB for this object backup storage group, OAM stores the backup copies to optical. Otherwise, OAM stores the backup copy or copies of the object using the tapeunitname specified in the CBROAMxx PARMLIB member.

See z/OS DFSMS OAM Planning, Installation, and Storage Administration Guide for Object Support for more information about defining optical libraries in object and object backup storage groups.