(1) A named set of disks on which DB2 for z/OS data can be stored.
(2) A group that associates a storage system to a storage class. See also storage class, storage system.
(3) A collection of storage volumes and attributes that are defined by the storage management subsystem (SMS) administrator to meet a defined service strategy. The collections can be a group of direct access storage device (DASD) volumes; tape volumes; or a group of DASD, optical, or tape volumes treated as a single, object-storage hierarchy. See also tape storage group, virtual input/output storage group, object backup-storage group, object storage group, pool storage group.