Seagate ST118202LW/LC manual Terminator power, Circuits and data path widths

Cheetah 18 Installation Guide, Rev. A 23

ing the bus at the backpanel. For ST118202LW drives, use an in- line terminator on the cable.

Internal SCSI cable

Internal	Internal
SCSI device	SCSI device

Controller

Terminate

Internal SCSI cable

Internal	Internal	Controller
SCSI device	SCSI device

External

SCSI cable

External	External
SCSI device	SCSI device

Terminate

Figure 2. SCSI bus termination

Terminator power

You usually will not need to change this option and can normally leave the drive configured as it was shipped from the factory. For information about how to change the terminator power option on your drive, refer to the appropriate drive-specific section.

I/O circuits and data path widths

•These drives can be used in single-ended or low voltage differ- ential interface systems; however, do not attempt to mix these drives on the same daisy chain with high voltage differential devices. The circuits are not compatible and drive damage may occur.

•These drives have a “wide” (16-bit) SCSI data bus rather than the standard (non-wide) 8-bit SCSI data bus; however, you