Seagate ST19171WC User Manual

Barracuda 9 Installation Guide, Rev. B

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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.

• WD and DC models use differential I/O circuits. You cannot

mix these models with single-ended models (N, W, WC) on the
same SCSI bus. The circuits are incompatible with each other.

• W, WD, and WC models have a “wide” (16-bit) SCSI data bus

rather than the standard (non-wide) 8-bit SCSI data bus; how-
ever, you can use these wide drives on a standard (non-wide)
8-bit data bus.

The enclosure design must ensure adequate cooling for the
drive. The maximum ambient temperature is 50

°

C. 

The drive’s product manual (83329030) describes how to evalu-
ate the air-flow design. The evaluation consists of ensuring that
the case temperature of certain critical components remains
within acceptable limits during drive operation.

We recommend orienting the drive or directing the air flow in a
way that creates the least amount of air-flow resistance while
providing air flow above the circuit boards and around the head
and disc assembly (HDA). Also, choose the shortest possible
path between the air inlet and exit. This minimizes the distance
traveled by air that is heated by the drive and by other nearby
heat sources.