Seagate 240 DDS-4 manual Connecting the Scsi interface cable, Scsi Termination

A-16 Scorpion 240 Autoloader Installation Manual

Connecting the SCSI interface cable

Turn off all power to your computer and drive. Then connect a 68-pin wide internal SCSI cable from your SCSI controller to the SCSI connector on the back of the autoloader. Make sure that pin 1 on the SCSI controller and cable is connected to pin 1 on the drive. Figure 4 shows the location of SCSI pin 1 on the drive’s SCSI connector. Pin 1 on the SCSI cable should be indicated by a colored stripe.

Scorpion 240 drives can be used with two different types of SCSI interfaces: Ultra2 SCSI (LVD) or “Wide” (16-bit) single- ended SCSI. The drive can automatically detect whether it is connected to an LVD or single-ended wide SCSI bus.

Note: The Scorpion 240 will not operate properly in a SCSI-1 environment.

Figure 4. Interface connectors on internal Scorpion 240

pin 34		pin 1	Power connector
			pin 4	pin 1
pin 68	Ultra2 SCSI 68-pin	pin 35	+5V	12V
	high-density connector		pin 3: GND	pin 2: GND
			(+5V return)	(+12V return)

SCSI Termination

The internal Scorpion 240 does not provide SCSI termination. For this reason, it should not be the last device on a SCSI chain. Two termination examples are shown in Figure 5 on the following page. If the drive is the only SCSI device, attach the drive to the connector which is next to last on the SCSI