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Setting the system board jumpers 71
The following table shows the settings required to allow programming of the
BMC boot block. Make sure you turn off the server and unplug the power
cord before moving the jumper.
FRB Enable jumper
The server supports fault resilient booting (FRB) which causes the second
processor to take over the boot process if the first processor fails to respond
within a specified time. The FRB Enable jumper on the system board (pins 1
through 3 on jumper J3J1) lets you enable FRB. (See the figure on page 6 for
the location of the jumper.)
The following table shows the settings required to enable FRB. Make sure you
turn off the server and unplug the power cord before moving the jumper.
Mode Jumper
Setting
Action When Set
Normal
Pins 1-2
BMC boot block is write protected
(default)
Writes enabled
Pins 2-3
Allows BMC boot block to be
programmed through the correct
utilities.
Caution Moving the jumper while the power is on can damage the
server. Always turn off the server and unplug the power
cord before moving the jumper.
Mode Jumper
Setting
Action When Set
Enable
Pins 1-2
FRB is enabled (default)
Disable
Pins 2-3
FRB is disabled
Caution Moving the jumper while the power is on can damage the
server. Always turn off the server and unplug the power
cord before moving the jumper.
8506162.book Page 71 Wednesday, May 10, 2000 10:21 AM