6.2.3.2J3 Clear EPROM

J3 is a two-pin header that clears the erasable progammable read-only memory (EPROM) configuration data.

6.2.3.3J4 BIOS Enable

J4 is a 2-pin header that enables or disables the MegaRAID onboard BIOS. The onboard BIOS should be enabled (J4 unjumpered) for normal board position. Table 6.3 shows the jumper settings.

Table 6.3 Pinout for J4 BIOS Enable

J4 Setting

Onboard BIOS Status

Unjumpered Enabled

Jumpered Disabled

6.2.3.4J5 SCSI Activity LED

J5 is a two-pin connector that attaches to a cable that connects to the hard disk LED mounted on the computer enclosure. The LED indicates data transfers (SCSI bus activity.)

6.2.3.5J6 Serial Port

J6 is a 3-pin header that attaches to a serial cable. This is used for test purposes only.

6.2.3.6J8 Connector for Optional BBU Daughter Card

J8 is 40-pin connector that is used to mount an optional battery backup unit that is on a daughtercard.

6.2.3.7J9 SCSI Bus Termination Power

J9 is a 2-pin jumper. The factory setting is pins 1-2 shorted. Leave at the default setting (jumper installed) for J9 to allow the PCI bus to provide termination power.

Installation Steps

6-5

Copyright © 2002 by LSI Logic Corporation. All rights reserved.