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System Board Switches
System Board Switches
The following table provides the system switch identifiers and descriptions of these
switches. The system switch block is identified by key 3 in the illustration at
“System Board Connectors” on page 169.
Note: Turn off the server and disconnect the power cord before moving any
switches.
Table 17. System Board Switch Block SW1
Identifier Switch Description
1 Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor.
See Table 18 on page 171 for details.
2 Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor.
See Table 18 on page 171 for details.
3 Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor.
See Table 18 on page 171 for details.
4 Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor.
See Table 18 on page 171 for details.
5 When On, perform BIOS recovery using boot block (boot block recovery).
The recovery boot block is in a protected area of flash memory that cannot be
overwritten. When the BIOS becomes corrupted (for example, if a power failure
occurs during a flash update), the recovery boot block can be used to restore the
BIOS. The code in the recovery boot block enables the server to start up and read a
flash diskette. The flash utility automatically recovers the system BIOS from the
BIOS recovery files on the diskette. When the flash is complete, the switch must be
moved to the Off position.
The default setting is Off (disabled).
6 When On, sets the host bus speed to 66 MHz. When Off, the host bus speed is 100
MHz.
The default setting is Off.
7 Power-on override.
When On, overrides the power-on switch and forces power-on mode. The system
will always boot without the use of the power-on switch.
The default setting is Off (disabled).
8 When On, bypass the power-on password. When Off, require the user to enter the
power-on password at startup if one is set.
The default setting is Off.
170 Netfinity 5000 Server Hardware Information and Procedures