This command conditionally turns off the device busy bit so that IBM's Missing Interrupt Handler (MIH) can initiate recovery action for a Virtual Device. Issue the command once for each pending I/O against the Virtual Device. If there are five pending I/Os, issue the command five times. Because you cannot easily determine the number of pending I/Os waiting on a device, issue the command until the SVTnR3424E message is issued. The following example shows the commands:
SVT1 MIH=343F SVT1X0100I Command Scheduled in SVTS SVT1X0101I Command Complete SVT1R3424E 343F,Device not busy
When the command is issued, the application job using the affected Virtual Device gets I/O errors and abnormally terminates.
You can use the optional DUMP parameter to generate a dump of all related areas. The dump is the same as the dump that the SVTn DUMP command takes.
SVTn MIHclear=nnnn [,DUMP]
Where nnnn is the address of the Virtual Device.
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