Avago Technologies MegaRAID SATA 300-4XLP - Manual (Page 35)

Storage Adapter Board Specifications 3-5
Version 1.4 Copyright © 2004–2006 by LSI Logic Corporation. All rights reserved.
3.2.2 SATA 300-4XLP Connectors and Jumpers
Table 3.2 describes the connectors and jumpers on the SATA 300-4XLP
board.
Table 3.2 SATA 300-4XLP Connectors and Jumpers
Jumper Type Description
J1 Battery Pack Connector 20-pin connector.
Provides interface to the remote battery pack.
J2 LED SATA Activity
Connector 2-pin connector.
When lit, it indicates SATA activity on one or more SATA drives.
J3 Firmware Initialization
Mode Select 2-pin connector.
If the firmware flashed onto the board is corrupted, you need to
install a jumper on J3 (this holds the CPU core in reset), so you
can flash the firmware. Remove the jumper after you flash the new
firmware.
No jumper: This is the setting during normal operation (Mode 3).
This is the default.
Jumper: This holds the CPU core in reset (Mode 0).
1. Note: The card does not function as a RAID controller if this
jumper is mounted.
J4 I
2
C Interface 3-pin connector.
The I
2
C interface is for communication with storage enclosure
processor (SEP) devices.
J6 Serial Port RS232
Debugger 4-pin jumper.
Used for diagnostic purposes.
J7 BIOS Disable jumper 2-pin jumper.
The BIOS function is enabled or disabled in the software
depending on the status of this jumper.
No jumper: BIOS is enabled. This is the default.
Jumper: BIOS is disabled.
1. Note: The card does not function as a RAID controller if this
jumper is mounted.