American Megatrends MegaRAID Express 500 - Manual (Page 73)

Chapter 6 Hardware Installation 59
Step 6 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. Termination should be
set at each end of the SCSI cable(s), as shown below. Termination is always
enabled, regardless of the configuration. However, you can override this setting
by setting another state.
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
MegaRAID Express 500 card to one end of the SCSI cable and to connect an
external 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.