062

Explanation

An error occurred on one or more channel paths to reserved devices (such as DASD) or assigned devices (such as tapes).

System action

The system does not use the channel paths until recovery is complete. Recovery waits until the operator restarts the system.

The system issues message IOS201E when the I/O on other processors that share devices can be started.

Operator response

The correct response varies, depending on whether there are non-DASD devices on any channel paths where an error occurred.

For errors on channel paths with DASD or assignable devices only:
  1. Enter the IOACTION STOP command to prevent other processors that share devices from initiating I/O. If the IOACTION STOP command fails, stop sharing processors to prevent I/O activity to the shared devices.
  2. After the IOACTION STOP command is successful or sharing processors have been stopped, restart the system that has the error.
  3. After the system issues message IOS201E, do one of the following:
    • If the IOACTION STOP command was successful, enter the IOACTION RESUME command.
    • Otherwise, restart sharing processors.
For errors on channel paths with at least one non-DASD or non-assignable device:
  1. Stop sharing processors to prevent I/O activity to the shared devices.
  2. Restart the system that has the error.
  3. After the system issues message IOS201E, restart sharing processors.

See z/OS Problem Management for further information about restarting the system.

Source

Input/output supervisor (IOS)