OpenEye GraniteRack 3U - Manual (Page 32)

Getting Started
2-10
2.4 SCSI Termination
Two 68-pin wide SCSI connectors are provided on the back of the enclosure
for connecting the array to the system. These connectors are used in one of
two ways:
If the disk array is the only external SCSI device, or is the last external
device in a daisy-chained configuration, connect the incoming cable (the
one which is attached to the SCSI adapter) to the Host A & B in connec-
tor and install the external SCSI Terminator on the Host A & B out
connector.
If the array is to be placed in the middle of a daisy-chained configuration,
connect the incoming cable (the one which is attached to the SCSI
adapter) to the Host A & B in connector and connect the outgoing cable
(the one which continues on to other devices) to the Host A & B out
connector. In this case, no terminator is required at the disk array but
the last device in the daisy chain must have a terminator.
Correct SCSI termination procedures require that the last devices 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 performance may occur.
Typically, the system or host adapter (SCSI card inside the PC) is the first
device and is already terminated. When installing the disk array on a SCSI