The Global Mirror function encountered an I/O error. The message text provides the following information:

device_number

The device number to which the I/O is directed.

serial_number

The volume serial number, if available, of the device that encountered the I/O error.

failing_CCW_command_code

The channel command word (CCW) code that encounters the I/O error.

failing_CCW_position

The position in the channel program chain on which the error occurs. If the error occurs at the first CCW in the chain (a Define Extent), the path to the storage control or device can have been dropped. This can indicate an operations error because of the storage path being removed.

CCW_data_area

The parameter list data area of the failing CCW.

full_error_description

A brief description of the cause of the I/O error based on the sense data. The descriptions are as follows:

• NONVOLATILE_STORAGE_NOT_ AVAILABLE

  This indicates that nonvolatile storage has been altered. Issue the DEVSERV MVS™ operator command to determine the status of nonvolatile storage. Do not disable nonvolatile storage for storage controls that have an active session. Correct the problem re-enabling nonvolatile storage and reissuing the command.

• INVALID_COMMAND

  This is due to issuing a command to a storage control that does not have that command capability.

• INVALID_COMMAND_SEQUENCE

  This is either due to an internal error or because a command has been issued to a storage control that does not have that command capability.

• CCW_COUNT_LESS_THAN_REQUIRED

  This is due to an internal error.

• INVALID_PARAMETER

  This is either due to an internal error or because a command has been issued to a storage control that does not have that command capability.