Seagate BARRACUDA 36 ST136475LW/LC - Manual (Page 43)

Barracuda 36 Installation Guide, Rev. B 41
LW drives
Figure 8. Using J5 connector for model “LW” drive
alternate ID select and LED connection
J1-DC Power
J1
68 Pin SCSI I/O
Connector
Drive
HDA
Rear
SCSI ID = 8
SCSI ID = 9
SCSI ID = 10
SCSI ID = 11
SCSI ID = 12
SCSI ID = 13
SCSI ID = 14
SCSI ID = 15
A not used 3 A2 A1
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
A0
J5
Pin 1
4P 3P2P 1P
PCBA
Pin 1
+5V
Ground
(default)
A0 A1 A2 A3
11 9 7 5 3 1
12 10 8 6 4 2
Host Alternate
Usage Plug
Pins 1, 3, 5, and 7 are
optional connections to
switching circuits in host
equipment to establish
drive ID.
Remote Switches
For ID selection use
jumpers as shown or
connect a cable for
remote switching as
shown below.
Dashed area is optional host circuitry (external to the
drive) connected to host supplied optional usage plug.
+5V
Drive Activity LED
+5V N.C.
Ground
Pins 2, 4, 6, and 8 are normally
not grounded. They are driven low
(ground) for 250 ms after a Reset or
PWR ON to allow drive to read
SCSI ID selected. Pin 8 may
also be used to drive the cathode
of an external Activity LED.