Table 11. Server Board Jumper Summary (continued)

Jumper Block

Jumper Name

Pins (default in bold)

What it does at system reset

 

 

 

 

J2J1

CMOS CLR

1-2, Protect

Preserves the contents of NVRAM.

 

 

2-3, Erase

Replaces the contents of NVRAM with the

 

 

 

manufacturing default settings.

 

 

 

 

J2J1

PSWD CLR

5-6, Protect

Maintains the current system password.

 

 

6-7, Erase

Clears the password.

 

 

 

 

 

 

J2J1

RCVRY BOOT

9-10, Normal

System attempts to boot using the BIOS

 

 

 

stored in flash memory.

 

 

10-11, Recovery

BIOS attempts a recovery boot, loading

 

 

 

 

 

BIOS code from a floppy diskette into the

 

 

 

flash device. This is typically used when the

 

 

 

BIOS code has been corrupted.

 

 

 

 

J2J1

BIOS WR EN

13-14, Protect

BIOS boot block is write-protected.

 

 

14-15, Erase/Program

BIOS boot block is erasable and

 

 

 

 

 

programmable.

 

 

 

 

General Procedure to Change Jumper Setting

The short general procedure for changing a configuration setting is the same for most of the jumper functions, so we will describe it here.

1.Observe the safety and ESD precautions at the beginning of this chapter.

2.Turn off all connected peripherals, turn off system power, and disconnect the AC power cord.

3.Remove the side cover. You do not need to remove the server board from the chassis, and you probably do not need to remove any add-in boards.

4.Locate the configuration jumpers at the edge of the server board toward the front of the system.

5.Move jumper to pins specified for the desired setting.

6.Reinstall the side cover, connect the power cord, and turn on the system for the change to take effect.

7.You may need to repeat these steps to move the jumper back to its original setting, depending on the jumper function.

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Technical Reference