Tape Library object
A Tape Library object represents a single physical tape storage unit associated with a DPM-enabled CPC. The available pathways to a tape library are defined as instances of Tape Link objects. Tape libraries are automatically discovered, however that discovery requires a single worldwide port name (WWPN) be zoned such that a CPC can detect them. This WWPN is referred to as the management WWPN. The process for supporting tape libraries starts with a request to a storage administrator to configure the management WWPN (see Request Tape Library Zoning). Once the storage administrator completes that configuration, the CPC is able to discover the tape libraries that are within that network. After the Request Tape Library Zoning request is made, library discovery is automatically performed once every 10 minutes. That discovery period changes to once every 24 hours after a tape library has been discovered or 24 hours passes, whichever comes first.
Once they are discovered, tape library instances are persisted and remain visible to an API client even if they are subsequently deconfigured by the storage administrator. If that happens (as indicated by a "Not Available" value of the tape library state property), it can be removed through the Undefine Tape Library operation. Once tape libraries are discovered, links to them are created using Create Tape Link.