Silicon Graphics CHALLENGE L, User Manual, Page: 97 / 164

Using the System Controller
81
the operator from repeatedly applying power when an overvoltage
condition exists.
The Power-On Process
You can monitor the boot process when you power on the system by
watching the System Controller. When you turn the key switch to the On
(middle) position on the System Controller front panel, it enables voltage to
flow to the system backplane. The green power-on LED lights up, and
immediately after that the yellow fault LED comes on. The System
Controller initializes and performs its internal startup diagnostics. If no
problems are found, the yellow fault LED shuts off.
Note:
If the yellow fault LED stays on for more than a few seconds, a fault
message should appear. If it stays on and no message appears on the display,
you may have a faulty LCD screen or a problem with the System Controller.
Contact your system administrator or service provider.
The following steps are similar to what you should see when you bring up
the system:
1. When the System Controller completes its internal checks and the
system begins to come up, two boot messages appear:
BOOT ARBITRATION IN PROGRESS
BOOT ARBITRATION COMPLETE SLOT OxY PROC OxZ
2. The screen clears and the message
STARTING SYSTEM
should appear.
3. A series of status messages scrolls by. Most pass by so quickly that they
are unreadable. These messages indicate the beginning or completion
of a subsystem test.
4. After all the system checks are complete, you receive a status message
that looks similar to:
PROCESSOR STATUS
B+++
The
B+++
shown in step 4 indicates that the bootmaster microprocessor is
active along with three other functioning microprocessors on the CPU
board.