Using the DEVSERV QPAVS option

Use the QPAVS option of the DEVSERV command to validate MVS storage resident control blocks with data acquired directly from the storage subsystem. If devices are in a PAV or HYPERPAV relationship, the output shows the relationship between the PAV base and alias devices.

Optionally, you can obtain a hexadecimal display of related MVS system control blocks:

Unit control block (UCB), UCB prefix, and UCB common extension
Device class extension (DCE)