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Server component identification 69
System board switches
Some server operations, including adding or removing a component or changing a security feature, require that you
reconfigure a system switch. If the system configuration is incorrect, the server might not work properly and you might
receive error messages on the screen. Setting and checking the system board switches is an important part of the
overall troubleshooting process.
The server has three switch banks:
• System maintenance switch (SW3)
• System ID switch (SW4)
• iLO/Redundant ROM override switch (SW5)
This section provides figures and tables to identify the locations, positions, functions, and settings for each of these
switches.
System maintenance switch (SW3)
Figure 63 System maintenance switch (SW3)
Table 23 System maintenance switch (SW3)
Position Default Function Description Settings
1 — Reserved — —
2 Off Lock configuration Enables or disables
configuration changes
NVRAM.
Open (off)
Configuration can be
changed.
Closed (on)
Configuration is locked
and cannot be
changed.
3 — Reserved — —
4 Off Diskette boot override Enables or disables
booting from diskette
drive.
Both settings enable
you to read from and
write to the diskette
after the system
completes the boot
sequence.
Open (off)
The diskette drive boot
is controlled by the
configuration.
Closed (on)
The diskette drive boots
regardless of the
configuration.