PAV requirements for the DS6000

Parallel access volumes (PAVs) can provide significant performance enhancements in S/390 and zSeries 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 the DS6000™:

The configuration that you create on the DS6000 must match the configuration that you create using IOCP or HCD.
The CU image numbers that exist on the DS6000 depend on what 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 only have 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 in order to know what CU images are on the DS6000.