Use this information to locate the system-board switches.
The following illustration shows the location of the switch blocks on the system board.
1 SW5 switch block | 4 SW3 switch block |
2 SW8 switch block | 5 SW2 switch block |
3 SW1 switch block |
The following table describes the functions of the switches on switch block SW5.
Switch number | Description | Definition |
---|---|---|
SW1–1 | ME recovery | ME boots to recovery |
SW1–2 | ME firmware security override | For debug only. |
SW1–3 | Power permission | Changing this switch to the on position enables Power On |
SW1-4 | BMC reset | Changing this switch to the on position forces the compute node to reset the BMC. |
The following table describes the functions of the switches on switch block SW5.
Switch number | Description | Definition |
---|---|---|
SW5-1 | Password override | The default position is Off. Changing this switch to the On position overrides the power-on password. |
SW5-2 | Trusted Platform Module (TPM) physical presence | The default position is Off. Changing this switch to the On position indicates a physical presence to the TPM. |
SW5-3 | Real time clock (RTC) reset | The default position is Off. Changing this switch to the On position resets the RTC. A momentary toggle is all that is required. To avoid excessive CMOS battery drain, do not leave this switch in the On position. |
SW5-4 | Serial select | The default position is Off (send the serial input output (SIO) to the front serial port). Changing this switch to the On position sends the BMC to the serial port. |
The following table describes the functions of the switches on switch block SW8.
Switch number | Description | Definition |
---|---|---|
SW8-1 | Boot backup XClarity Controller | When the switch is in the default Off position, the compute node will boot by using the primary XClarity Controller firmware. When the switch is in the On position, the compute node will boot by using a backup of the XClarity Controller firmware. |
SW8-2 | Boot backup UEFI | The default position is Off. Changing this switch to the On position forces the compute node to boot from the backup UEFI image. |
SW8-3 | iBMC force update | The default position is Off. Changing this
switch to the On position bypasses the operational firmware image
and performs a BMC firmware update, if the normal firmware update
procedure results in an inoperative BMC. Note: Use this switch only
if the normal firmware update procedure fails and the operational
firmware image is corrupted. Use of this switch disables normal baseboard
management controller operation.
|
SW8-4 | Wake on LAN (WOL) disable | Changing this switch to the On position disables WOL. |