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Cheetah 18 Installation Guide, Rev. A 23
ing the bus at the backpanel. For ST118202LW drives, use an in-
line terminator on the cable.
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
Internal
SCSI device
Internal
SCSI device
Controller
External
SCSI device
External
SCSI device
External
SCSI
cable
Internal SCSI cable
Terminate
Internal
SCSI device
Internal
SCSI device
Controller
Internal SCSI cable
Terminate