CVIO

CVIO (Clear VIO)

This parameter specifies that all VIO data set pages on auxiliary storage are to be deleted from page space. A typical application would be the purging of VIO data set pages when the system initial program is reloaded after a previous end-of-day (EOD).

Note: If you want the auxiliary storage manager (ASM) to purge and reinitialize both the VIO data set pages and the PLPA pages, specify CLPA. CLPA always implies CVIO.

If you do not specify CVIO, a warm start IPL occurs and VIO data set pages are retained for restart processing. (Such restart would be possible for some data sets after a temporary system failure.) ASM reestablishes the VIO data set pages that had checkpoints set before the system failure. This action, of course, does not ensure that the job entry subsystem will reuse these data sets.

If one or more volumes that contain VIO pages are not mounted on a warm start IPL, ASM requests the operator to mount the missing volumes. If the operator does not mount all the requested volumes that contain VIO pages, ASM deletes all VIO data set pages, just as if CVIO or CLPA had been specified. The operator receives a message that indicates that CVIO has been forced.

Value Range: Not applicable

Default Value: None

Associated Parmlib Member: None