Expand Management Programming Manual

EVENT MANAGEMENT
3: ZEXP-EVT-IO-BUS-ERR
Probable Cause
An I/O-bus error occurred during a data transfer with the
indicated device on a channel controlled by the sender CPU, and
an I/O path switch took place. The system retries the operation,
then retries the other path. If the file-system error number in
the token ZEXP-TKN-IO-BUS-ERR is in the range 210 through 229,
the operation might have been switched to the other CPU.
This event can be caused by a controller generating a continuous
I/O power-on interrupt. In this case, the application that is
trying to communicate with the device receives an error code
(usually #231, I/O power on) in response to its I/O request.
A TMDS event is generated.
Recommended Action
Appropriate recovery depends on the file-system error that
occurred. For information on file-system errors and how to
recover from them, refer to the System Procedure Errors and
Messages Manual .
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