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36 Barracuda 4 Installation Guide, Rev. E
Terminating the drive
To terminate the ST15150N drive, enable the perma-
nently mounted IC active terminators by installing an
Enable Drive Terminator jumper on J01 pins 1 and 2 as
shown in Figure 11. If you install one of these models
and it is not on the end of the SCSI bus, remove the
jumper to disable the permanently mounted IC termina-
tors and thereby remove internal termination from the
drive.
The ST15150ND drive does not have internal termina-
tors or any way of adding internal termination. You must
provide external active termination (ANSI SCSI-2 Alter-
native 2) to the drive when termination is required.
Pin 1
J4
J01
J01
Pin 1
Pin 2
Pin 3
Enable drive terminator.
Disable drive terminator.
Figure 11. Terminating the drive
N/ND drives