A18
Explanation
The system received an unsolicited device end interruption for a volume containing a paging data
set. Volume serial verification failed for one or more of the following reasons:
- The device address contained a volume with a different volume serial number.
- An I/O error occurred while attempting to read the volume label.
- The device went from ready to not ready status when volume verification attempted to read the volume label.
System action
The system enters wait state X'A18'.
Operator response
Do the following:
- Ensure that all volumes containing paging data sets are on the same device addresses as they were at system initialization.
- Ensure that all devices are ready.
- Restart the waiting processor.
Source
Input/output supervisor (IOS)