H3C UniServer B5800 G3, User Manual

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9
Figure 7 System board DIMM slot layout
System maintenance switch
Table 5 describes how to use the maintenance switch. For more information about the position of the
maintenance switch, see " System board components ".
Table 5 System maintenance switch description
Item Description Remarks
1
•
Pins 1, 2, 3, 4, 5, 6, and 7 are reserved for future use.
•
Pin 8:

Off (default) —HDM login requires the username
and password of a valid HDM user account.

On —HDM login requires the default username
and password.
For security purposes, turn off the
switch after you complete tasks
with the default username and
password as a best practice.
2
•
Pins 1-2 jumped (default) —Normal server startup.
•
Pins 2-3 jumped —Restores the default BIOS
settings.
To restore the default BIOS
settings, jump pins 2 and 3 for
more than 30 seconds and then
jump pins 1 and 2 for normal server
startup.
3
•
Pins 1-2 jumped (default) —Normal server startup.
•
Pins 2-3 jumped —Clears all passwords from the
BIOS at server startup.
To clear all passwords from the
BIOS, jump pins 2 and 3 for over
30 seconds and then jump pins 1
and 2 for normal server startup.