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Chapter 5: Having Trouble?
take place. An internal System Controller error never causes the
Challenge deskside system to shut down.
Whenever possible, the System Controller alerts the master CPU that a
system-threatening error situation exists and a shutdown is about to
happen. The System Controller then waits for a brief period for the CPU to
perform an internal shutdown procedure. The controller waits for a “Set
System Off” command to come back from the master CPU before
commencing shutdown. If the command does not come back from the CPU
before a specified time-out period, the System Controller proceeds with the
shutdown anyway.
Detection of a system event monitored by the System Controller
automatically sends a message to the master CPU. The warning message is
recorded in the event history log, and the CPU is expected to take corrective
action, if applicable. No system shutdown is implemented.
See Appendix C for a complete list of messages that can appear in the event
history log.
Boot Status Menu
The Boot Status menu supplies the last message sent by the master CPU after
the master CPU selection process is concluded. A total of five status
messages can appear under this menu selection. The messages are listed in
Table 5-1, along with a brief explanation of their context and meaning.
Table 5-1 System Controller Master CPU Status Messages
Master CPU Status Message Context and Meaning of Message
BOOT ARBITRATION NOT STARTED The system CPU board(s) has not begun
the arbitration process.
BOOT ARBITRATION IN PROGRESS The system CPU boards are
communicating to decide which one will
be the system master CPU.
BOOT ARBITRATION IS COMPLETE
SLOT #0X PROC #0X The chosen CPU master has identified
itself to the System Controller and
communication is fully established.