Seagate ST373454 Manual download pdf (Page 50)

40 Cheetah 15K.3 SCSI Product Manual, Rev. G

Figure 20. J2 option select header (on LW models only)

8.1.1 Notes for Figures 18, 19, and 20.

[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J5, and J6 are

provided in Section 8.1.2. The term “default” indicates how standard OEM units are configured when

shipped from factory. “Off” means the jumper is not installed; “On” means a jumper is installed. OFF or ON

underlined indicates the factory default condition.

The PCBA on LC models does not have connectors J2 and J5. The J5 connector signals conform to SFF-

8009 Revision 2.0, Unitized Connector for Cabled Drives, signal assignments for auxiliary connectors.

[2] These signals are also on the 80-pin J1 I/O connector. See Tables 17 and 18.

[3] Voltage supplied by the drive.

[4] Dashed area is optional host circuitry (external to the drive) connected to host-supplied optional usage

plug.

[5] Do not connect anything to J5 pins 9, 11-12, or J6 pins 13-20.

[6] Connect an external Drive Activity LED to J6 pins 11 and 12, or to J5 pin 8 and the drive’s +5V power

source, through an appropriately-sized current-limiting resistor. The drive provides an internal 150 ohm

current-limiting resistor for the J6 connection.

Parity Disable

Term. Power to SCSI Bus

No connection

Jumper Plug

(enlarged to

show detail)

Additional notes on these

functions in section 8.1.2.

Drive

Front

Jumper

Positions

Force single-ended bus mode

Pin 1

Write Protect

Enable Remote Motor Start

Delay Motor Start

LW Models

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 93 94

No comments

Seagate ST373454 Manual Page 50