IOACTION command

Use the IOACTION command to stop and resume I/O activity to direct access storage devices (DASDs) without varying the DASD offline, when the DASD is shared between systems AND is in recovery by the input/output system (IOS).

CAUTION:

Use this command only in response to the IOS recovery messages IOS427A and IOS062E and wait state X'062'.

After the IO STOP command is entered, the system allows several seconds for current I/O activity to end.

Do not leave devices stopped any longer than necessary to perform recovery. System storage is used by all initiated I/O operations and is only freed after the I/O operations complete.

Do not use this command for devices that contain system-owned data sets or the system residence volume, or page data sets. Also, EREP will not run while devices are stopped.

The system displays message IOS601I to remind you that I/O activity is stopped to the specified DASD. This message remains displayed until all I/O activity is resumed with the IOACTION RESUME command.