IBM 865951Y Hardware Maintenance Manual - Page 155

System board switches, Table 11. System Board Switch Block SW1

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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 143. Note Turn off the server and disconnect the power cord before moving any switches. Table 11. System Board Switch Block SW1 Identifier 1 Switch Description Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 on page 148 for details. 2 Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 on page 148 for details. 3 Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 on page 148 for details. 4 Switches 1, 2, 3, and 4 in combination specify the frequency for the microprocessor. See Table 12 on page 148 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. Note If the processor in you system does not react to switch changes, it is not an error. Netfinity 5000 - Type 8659 147

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System board switches
The following table provides the system switch identifiers
and descriptions of these switches.
The system switch
block is identified by key
±3²
in the illustration at “System
board connectors” on page
143.
Note
Turn off the server and disconnect the power cord
before moving any switches.
Note
If the processor in you system does not react to switch
changes, it is not an error.
Table 11. 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
12 on page
148 for details.
2
Switches 1, 2, 3, and 4 in combination specify the
frequency for the microprocessor.
See Table
12 on page
148 for details.
3
Switches 1, 2, 3, and 4 in combination specify the
frequency for the microprocessor.
See Table
12 on page
148 for details.
4
Switches 1, 2, 3, and 4 in combination specify the
frequency for the microprocessor.
See Table
12 on page
148 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.
Netfinity 5000 - Type 8659
147