Defined Events and Recovery Actions

The adapter fatal hardware failure event is intended to indicate that no further commands to or from this device are likely to succeed, because the adapter to which it is attached, has failed. It is recommended that the application end the session with the device.

The unrecoverable adapter command failure event is not necessarily a fatal condition, but it can indicate that the adapter is not functioning properly. Possible actions by the application program include:

• Ending of the session with the device in the near future.
• Ending of the session after multiple (two or more) such events.
• Attempt to continue the session indefinitely.

The SCSI Reset detection event is mainly intended as information only, but can be used by the application to perform further actions, if necessary.

The maximum buffer usage detected event only applies to a given target-mode device; it will not be reported for an initiator-mode device. This event indicates to the application that this particular target-mode device instance has filled its maximum allotted buffer space. The application should perform read system calls fast enough to prevent this condition. If this event occurs, data is not lost, but it is delayed to prevent further buffer usage. Data reception will be restored when the application empties enough buffers to continue reasonable operations. The num_bufs attribute might need to be increased to help minimize this problem. Also, it is possible that regardless of the number of buffers, the application simply is not processing received data fast enough. This might require some fine tuning of the application's data processing routines.