Galaxy RAID GHDX2-2430S-16U4D Installation and Hardware Reference Manual
3-2
SCSI Connection
Overview
Figure 3-1: SCSI Connectors on the Controller Rear Panel
NOTE:
Do not connect the host busses or expansion ports to legacy Single-
Ended devices. Doing so will force the SCSI bus to operate in the SE
mode and seriously downgrade system performance.
3.1.3 SCSI Termination
Correct SCSI termination procedures require that the last device on the
SCSI bus be terminated. If the last device is not terminated or if devices
other than the last are terminated, erratic SCSI bus behaviors may occur.
An auto-detection, on-board terminator is built into the GALAXY RAID.
You do not need to install an external terminator when a subsystem acts as
the last device in the daisy chain configuration. The on-board terminator
default is enabled. If the subsystem is not the last device in the daisy chain
configuration, the terminator will be automatically disabled. Although it is
not recommended, if you prefer to disable the firmware setting for the on-
board terminator using the LCD keypad panel, RS-232C terminal session, or
RAIDWatch management software, the auto-detection function is also
disabled.
Typically, the host computer or host adapter (SCSI card inside a host
computer) is the first device and some are already terminated. When
installing the GALAXY RAID on a SCSI bus with other devices, be sure to
observe the above rules regarding all devices on the SCSI bus. Consult your
host computer and/or host adapter manual for additional information on the
correct termination procedures.