IBM Eserver xSeries 360 Type 8686, Руководство пользователя

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IBM® xSeries 360: User’s Reference
The following illustration shows the location of the flash ROM page swap jumper (J52)
and power-on password override jumper (J56) on the system board. See “Changing
jumper positions” for information on changing jumper positions.
Changing jumper positions
Jumpers on the system board help you to customize the way the server operates.
The server system board contains three-pin jumper blocks. In some cases, jumper
settings might be combined to define a function. Table 5 describes the purpose of the
jumpers.
On a three-pin jumper block, each jumper covers two of the three pins. You can
position the jumper to fit over the center pin and either of the other two pins. To
identify pins 1, 2, and 3 on the system board, see the following illustration.
To change a jumper position for a three-pin jumper block:
1. Read the information in “Before you begin” on page 51.
Power-on password
override jumper (J52)
Flash ROM
page swap jumper (J56)
3
2
1
3
2
1
Table 5. Jumpers J52 and J56 on the system board.
Jumper name Description
Flash ROM page swap (J52) The default position is pins 1 and 2.
See “Recovering the BIOS code” on page 120 for additional
information.
Power-on password override
(J56) Changing the position of this jumper bypasses the power-on
password check if the jumper has been moved since the server was
last powered on.
Changing the position of this jumper does not affect the administrator
password check if an administrator password is set.
See “Power-on password” on page 18 for additional information on
the power-on password.