DFSMSrmm is a full-function tape management system that supports
your current non-system-managed volumes, as well as your system-managed
volumes in tape library dataservers. DFSMSrmm supports the implementation
of
both automated and manual tape libraries: - DFSMSrmm and DFSMSdfp share volume information.
Information
for cartridges entered in the tape library dataserver automatically
updates the DFSMSrmm control data set. If the volume is defined to
DFSMSrmm before it enters the tape library dataserver, DFSMSrmm informs
DFSMSdfp of the volume status in the DFSMSrmm control data set to
update the tape configuration database.
DFSMSrmm can also drive
Manual Cartridge Entry processing, which is another way of sharing
information. In this case, using DFSMSrmm information to drive updates
to the TCDB for system-managed manual libraries.
- DFSMSrmm works with DFSMSdfp to manage
volume scratch status.
If all data sets on a tape volume have
expired, DFSMSrmm calls OAM to update the volume's status and returns
the volume to scratch status. DFSMSrmm also calls OAM to update the
volume's status if a volume is reclaimed from scratch to private status.
- DFSMSrmm supports OAM's use of scratch thresholds defined for
system-managed tape libraries.
OAM creates a write-to-operator (WTO) message when
the tape library gets below the scratch volume threshold. This message
is handled directly by DFSMSrmm to start the procedure to return eligible
volumes to scratch status, or it can also be intercepted by NetView® (or an equivalent product)
and drive submission of an equivalent job.
- DFSMSrmm can be used
to request that OAM eject cartridges from the tape library dataserver
to move volumes offsite for disaster recovery.
z/OS DFSMS Implementing System-Managed Storage
Copyright IBM Corporation 1990, 2014