The operator entered a command to vary a path online. The system could not vary the path online because the volume serial number did not match the volume serial number for a DASD device.
The system does not vary the path online.
Check the cabling and switch connections to the device. If no errors are found, enter an ACTIVATE request or reIPL the system, specifying an I/O configuration definition that has a consistent logical definition to the physical device.
Input/output supervisor (IOS)
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