Transferring Data to Backing Storage

To terminate the use of the facilities of the IBM® DASD subsystems, you should transfer data residing exclusively in cache or NVS to backing storage on a subsystem basis. To transfer all data, enter:

destage subsystem rdev

where:

subsystem: is optional, is the default, and specifies that the data for the entire storage subsystem be destaged, regardless of which device within the storage subsystem received the command.
rdev: is the real device number, a list of real device numbers, or a range of real device numbers of the devices receiving the destage order.

Note: DESTAGE is valid only for cache storage subsystems supporting cache fast write, DASD fast write, and dual copy functions. If the specified subsystem does not support these functions, CP generates an error message.