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SPARCserver 1000 System Service Manual—June 1996
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2.4 Precautions when Using POST
A system may appear to be hung or not communicating if the terminal is
mistakenly connected to the wrong system board.
By convention, the system master is in slot 0. The factory ships systems in this
configuration. It is possible POST may assign a new system master in a
different slot if the original system master fails. If this occurs, correct it and
install a fully functional system board in slot 0.
Note – POST does not test components and functions internal to SBus cards,
disk drives, other peripheral devices, or interface cables. See diagnostic
software manuals supplied with your system for test instructions.
To run POST, See Section 2.7, “Running OBP and POST.”
2.5 Precautions when Using OBP
An appropriately configured system board must be selected from among those
available to become the system master. The method used to determine which
board is the correct one to become the system master depends on the Boot
PROM revision installed on the boards available.
•
if any board has Boot PROM revision 2.11 or lower, see Section 2.5.1
•
if all boards have Boot PROM revision 2.13 or higher, see Section 2.5.2
Note – Boot PROM version 2.12 released was never released.
2.5.1 System Boards with PROM Revision 2.11 (or Lower)
PROM revision 2.11 (or lower) uses master-nvram scheme to select the system
master board. In multiple-board configurations, when the system is powered
on for the first time, OBP may prompt you to select a system board to become
the new master. This prompt will appear only if:
•
The system does not recognize any board as the system master.
•
More than one board is recognized as being qualified to function as the
system master.
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