A Tape storage group can be assigned to an Multiple Virtual Storage (MVS™) scratch tape when it is first used to store an OAM object. The Tape storage group is assigned to the tape volume through the ACS routines at tape volume allocation.

A single tape volume can be associated with a Tape storage group and an Object storage group, or a Tape storage group and an Object Backup storage group. When space is needed to write a backup copy of an object, a tape volume is assigned to an Object Backup storage group. As a result, a single tape volume which is originally allocated inside of an ATLDS or MTL can be associated with both a Tape storage group and an Object Backup storage group.