IBM 7870B4U, Руководство по обслуживанию

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System-board switches
Use this information to locate and define system-board switches in the blade
server.
The following illustration shows the location of the light path diagnostics switch
on the system board.
SW1
SW3
The following table describes the function of each switch in the switch blocks
(SW1, SW2, SW3).
Switch number Description Switch setting Definition
SW1 - 1 Password override
switch Changing position of
this switch resets the
power on password. This switch overrides
the power on
password. The system
ships with this switch
off, but it can be on or
off in a functioning
system.
SW1 - 2 Trusted Platform
Module (TPM)
physical presence The default position is
off. Turning this switch to
the on position
indicates a physical
presence to the TPM.
SW1 - 3 ICH9 RTC reset Normally open. Toggle
to reset RTC. Resets the RTC. A
momentary toggle is
all that is required. To
avoid excessive battery
drain, do not leave this
switch closed.
SW1 - 4 Boot using the backup
IMM code. The default position is
off, allowing the blade
server to boot from the
primary IMM
firmware. When the switch is in
the default off
position, the blade
server will boot using
the primary IMM
firmware. When the
switch is on, the blade
server will boot using
a backup of the IMM
firmware.
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BladeCenter HS22 Type 7870, 1936, and 1911: Problem Determination and Service Guide