Commands to Offline Devices

The IBM® DASD subsystems report subsystem level changes and asynchronous message availability on any device in the subsystem. A device can be online or offline to CP. You can enter the following commands to both online and offline devices:
  • QUERY CACHE
  • SET CACHE
  • QUERY DASDFW
  • SET DASDFW
  • DISCARD
  • QUERY DUPLEX
  • QUERY PINNED
  • QUERY RSAW.
Note: For the QUERY CACHE and SET CACHE commands, offline device support only applies to devices attached to the IBM DASD subsystems.