A VARY ONLINE command for a device will wake up (POST) all local jobs waiting for the device on the z/OS allocation queues. If a VARY ONLINE command is deferred due to the external allocation of the target device, local jobs will not be posted until the external allocation completes and the local VARY ONLINE executes successfully. If a device has an MIA status of NOTAVAILABLE, use the MIA VARY AVAILABLE command to update the device’s status to AVAILABLE and drive online processing.
Example:
Assume two jobs go through allocation recovery. An operator responds WAIT/NOHOLD on behalf of both jobs. The operator then issues a VARY ONLINE command to a device that is not externally allocated and is present on Eligible Device List (EDL) for both jobs. Both jobs will be POSTed out of their WAITs and will re-enter allocation.
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