6.2.3.8J10 Termination Enable

J10 is a three-pin header that specifies hardware or software control of SCSI termination, as shown in Table 6.4. Leave at the default setting (jumper on pins 1 and 2) to allow the MegaRAID controller to automatically set its own SCSI termination.

Table 6.4 Pinout for J10 Termination Enable

Type of SCSI Termination

J10 Setting

 

 

Software control of SCSI termination using drive

Short pins 1-2

detection (default).

 

 

 

Permanently disable all onboard SCSI termination.

Short pins 2-3

 

 

Permanently enable all onboard SCSI termination.

OPEN

 

 

6.2.4Step 4: Set Termination

You must terminate the SCSI bus properly. Set termination at both ends of the SCSI cable. The SCSI bus is an electrical transmission line and must be terminated properly to minimize reflections and losses.

For a disk array, set SCSI bus termination so that removing or adding a SCSI device does not disturb termination. An easy way to do this is to connect the card to one end of the SCSI cable and to connect a terminator module at the other end of the cable. The connectors between the two ends can connect SCSI devices. Disable termination on the SCSI devices. See the manual for each SCSI device to disable termination.

6.2.4.1SCSI Termination

The SCSI bus is an electrical transmission line and it must be terminated properly to minimize reflections and losses. You complete the SCSI bus by setting termination at both ends.

You can let the card automatically provide SCSI termination at one end of the SCSI bus. You can terminate the other end of the SCSI bus by attaching an external SCSI terminator module to the end of the cable or by attaching a SCSI device that internally terminates the SCSI bus at the end of the SCSI channel.

6-6Hardware Installation

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