To serialize tape configuration database (TCDB) updates during
cartridge entry, eject, and change use attribute processing, a systems
level enqueue, at the volume serial number level, is performed using
global resource serialization.
The resource names are as follows:
QNAME-SYSZCBR
RNAME-MTL_VOLSER_volsername
Note: OAM already performs a SYSTEMS level enqueue for global resource
serialization. If you are using IBM's global resource serialization
ring or star support, you do not need to include the QNAME or RNAME
in the SYSTEM inclusion RNL. The QNAME and RNAME are provided for
documentation purposes. If a GRS-equivalent product is being used,
refer to that product documentation to ensure that the SYSTEMS level
enqueue is honored and for any setup that might be needed to propagate
the enqueue across your systems.
Recommendation: Use global resource
serialization. Without this serialization, simultaneous processing
of the same volser may result in a double
increment or decrement of the appropriate scratch count.