When the CA Vtape P2P Option is active, the Virtual VOLSERs should be defined in the VTPOOL member. The Scratch Synchronization Job will process the same as documented in the 'With Virtual Volume Pooling' section with one additional consideration.
Virtual Volumes created in a P2P configuration are owned by the CA Vtape Complex that first mounted them. These Virtual Volumes can only be scratched by their owning Complex. Attempting to scratch these volumes in another complex will result in a signature error.
A signature is an internal mechanism used by a CA Vtape Complex to identify a specific CA Vtape Complex. Each Virtual Volume has an owning signature and a remote signature field. Only the CA Vtape Complex with a signature matching the owning signature stored in the Virtual Volume Entry in the Global VCAT can scratch that Virtual Volume.
When the Scratch Synchronization Job executes, it will create a list of Virtual Volumes that were scratched that have a remote signature in their Virtual Volume Entries in the Global VCAT. The presence of a remote signature indicates that these Virtual Volumes were shared with a remote CA Vtape Complex. When the scratch process is complete, this list will be processed and broken down by remote CA Vtape Subsystem. These VOLSER subsets will then be transmitted to the appropriate remote CA Vtape Subsystem so it can synchronize its shared VOLSERs with the local or owning CA Vtape Subsystem.
Additional scratch related errors are documented by the SVTSDQ911E error message.
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