Avago Technologies eXtremeRAID 3000 - Manual (Page 34)

Connectors, Jumpers and LEDs
2-12 eXtremeRAID 3000 Installation Guide
SCSI Termination
Each end of a SCSI bus must be terminated to maintain proper voltage levels
for SCSI control and data signals. The device used for this purpose is called
a terminator, and it can be built into a controller, a SCSI peripheral device, or
it can be a plug placed on the connector at the very end of a SCSI bus.
The eXtremeRAID 3000 controller is equipped with SCSI termination
control circuitry. The eXtremeRAID 3000 controller’s termination is set to
be ON all the time. The controller can also detect whether single-ended (SE)
or low-voltage differential (LVD) termination is required, and can set the on-
board termination type as needed.
The end of the SCSI bus farthest from the controller must be terminated if
SCSI devices are connected to the SCSI channel. See Figure 2-8 for an
example of a SCSI device configuration connected to the internal SCSI
channel.
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Note
When connecting SCSI devices, it is better to
terminate the ends of the SCSI bus itself than it is to
terminate the end devices on the bus. This allows hot
swap devices to be added or removed from the SCSI
bus without affecting termination.