Lenovo ThinkSystem SR645 Maintenance Manual page 59

Table 18. Switch block and jumper description
Switch/jumper name
Switch 1 block
1
Clear CMOS jumper
2
Switch/jumper number
SW1
J1
Description
• Switch 1: One-time power-on password bypass
– Toggle to ON or OFF to bypass the power-on password
for one time.
Note: The switch cannot skip the privilege administrator
password.
• Switch 3: TPM physical presence status
(Default setting: OFF)
– Toggle to ON to assert host TPM physical presence,
which is required for some security settings.
• Switch 4: XCC force update
(Default setting: OFF)
– Toggle to ON to force XClarity Controller firmware to
enter the booting mode (For development purpose only).
• Switch 5: XCC SPI0 half ROM
(Default setting: OFF)
– Toggle to ON to force XClarity Controller to boot from a
backup image.
• Switch 6: Low security
(Default setting: OFF)
– Toggle to ON to enable low security mode for XClarity
Controller firmware (For development purpose only).
• Switch 2, 7, 8: Reserved
• Pins 1 and 2: The jumper is in default setting.
• Pins 2 and 3: Clear the real-time clock (RTC) registry.
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Chapter 2 Server components
49