Glossary 725
rack number. A six-character identifier that
corresponds to a specific volume’s shelf location in
the installation’s removable media library, and is the
identifier used on the external label of the volume to
identify it. The rack number identifies the pool and
the external volume serial number for a volume
residing in an automated tape library dataserver.
The rack number identifies the pool, the external
volume serial, and shelf location number for a
volume not residing in an automated tape library
dataserver. The rack number is not written by the
tape drive. It exists as an entry in the DFSMSrmm
control data set and on the external label of the tape.
See also shelf location.
rack pool. A group of shelves that contains
volumes ...