Seagate barracuda 4lp st34571n-w-wc-wd-dc Manual Do Utilizador
Barracuda 4LP Installation Guide, Rev. B
41
W/WD drives
Figure 12. Using J1-Auxillary connector for model “W”
and “WD” drive alternate ID select and LED
connection
connection
J1-DC Power
J1
68 Pin SCSI I/O
Connector
Drive
HDA
Rear
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
J1-Auxiliary
Pin 1A
4P
3P2P
1P
PCB
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
Usage Plug
Pins 1, 3, 5, and 7 are
optional connections to
switching circuits in host
equipment to establish
drive ID.
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.
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.
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.
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.