Challenge Io4 Prom, Mezzanine, And Troubleshooting; Hardware Configuration Commands; Checking And Updating The Hardware Inventory - Silicon Graphics POWER CHALLENGE User Manual

Appendix D
D. Challenge IO4 PROM, Mezzanine, and
Troubleshooting
This appendix supplies information about the Challenge IO4 PROM
(Programmable Read Only Memory) Command Monitor. This information
is separated into hardware configuration commands, environment
variables, and known bugs. Basic mezzanine board configurations on the
IO4 and troubleshooting tips are also covered.
Hardware Configuration Commands
The IO4 PROM allows you to examine and modify the hardware
configuration of your system using a variety of commands.

Checking and Updating the Hardware Inventory

When the system first powers on, the IO4 PROM automatically examines all
of the installed boards to determine if any of the components have failed.
During this process, the IO4 PROM reads a copy of the system's hardware
inventory from nonvolatile RAM and compares it to the system's current
configuration. If there are differences between the current and stored
hardware inventories, the IO4 PROM inventory checker will generate a
warning message. When a difference is detected during this comparison of
the hardware inventory, the PROM pauses to allow you to examine the error
messages. In the following example, the PROM detected a missing processor
on an IP19 board.
Checking inventory...
*** Slice 1 on the IP19 in slot 2 isn't visible
Press <Enter> to continue
If system uptime is critical (for example, if your system is the central server)
and operators are not available around the clock, you may not want the
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