Using the DEVSERV QDASD option

Use the QDASD option of the DEVSERV command to validate MVS™ storage resident control blocks for extended function status with data acquired directly from the storage subsystem. Optionally, you can obtain a hexadecimal display of:

• The following device-related MVS system control blocks:
  • Unit control block (UCB), UCB prefix, and UCB common extension
  • Device class extension (DCE)
  • Storage subsystem control block (SSSCB)
  • Device performance characteristics table (DPCT)
• The following data buffers acquired directly from the device:
  • Read device characteristics (RDC) data
  • Read configuration data (RCD) data
  • Sense subsystem status (SNSS) data