System-board-assembly switches

The following illustrations show the location of the switches on the server.

Note

If there is a clear protective sticker on the top of the switch blocks, you must remove and discard it to access the switches.

Important

1. Before you change any switch settings or move any jumpers, turn off the server; then, disconnect all power cords and external cables. Review the following information:

   • Safety Information page

   • Installation Guidelines

   • Handling static-sensitive devices

   • Power off the server

2. Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.

Figure 1. System-board-assembly switches

SW7 switch block (left)

The following table describes the functions of the SW7 switch block on the system board assembly.

Table 1. SW7 switch block description

Switch-bit number	Switch name	Default position	Description
1 SW7–1	XCC boot primary	Off	XCC boots from upper half of flash region when switched to ON.
2 SW7–2	XCC force update	Off	XCC boots from kernel code only when switched to ON.
3 SW7–3	Power permission override	Off	Ignores Power Permission and allows system to power-on when switched to ON.
4 SW7–4	Force XCC reset	Off	Forces XCC into reset when switched to ON.
5 SW7–5	Reserved	Off	Reserved
6 SW7–6	Reserved	Off	Reserved
7 SW7–7	Reserved	Off	Reserved
8 SW7–8	Reserved	Off	Reserved

SW6 switch block (right)

The following table describes the functions of the SW6 switch block on the system board assembly.

Table 2. SW6 switch block description

Switch-bit number	Switch name	Default position	Description
1 SW6–1	ME security override	Off	Disables ME Security checks when switched to ON.
2 SW6–2	Clear CMOS	Off	Clears the real-time clock (RTC) registry when switched to ON.
3 SW6–3	Password override	Off	Overrides the power-on password when switched to ON.
4 SW6–4	ME recovery	Off	Boots ME into recovery mode when switched to ON.
5 SW6–5	BIOS recovery	Off	Boots BIOS into recovery mode when switched to ON.
6 SW6–6	MFG mode	Off	Enables MFG mode of firmware (UEFI/XCC/FPGA) when switched to ON.
7 SW6–7	At-Scale debug	Off	Enables BMC At-Scale debug when switched to ON.
8 SW6–8	Low security	Off	Allows transitioning between signed official XCC builds and XCC test signed builds, and bypasses CRTM boot check of XCC firmware when switched to ON.