Using global resource serialization in a manual tape library

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.