PAV requirements for DS8000

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Parallel access volumes (PAVs) can provide significant performance enhancements in IBM® Z environments by enabling simultaneous processing for multiple I/O operations to the same logical volume.

The following list identifies the requirements for using PAVs on a DS8000 storage system:
  • The configuration that you create on the DS8000 storage system must match the configuration that you create with IOCP or HCD.
  • The CU image numbers that exist on the DS8000 storage system depend on which logical subsystems (LSSs) you configured:
    • The CU image addresses are 0 - 254. For IOCP and HCD, the CU addresses are hex 00 - FE.
    • Logical subsystem (LSS) addresses are 0 - 254.

    The configuration might have only a subset of these addresses, and the subset might not be contiguous.

    You need to know what CU images you created before you can update the I/O configuration. Your host system uses the updated I/O information to know what CU images are on your storage system.