Seagate ST136475LW/LC manual Providing adequate cooling

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Barracuda 36 Installation Guide, Rev. B

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Providing adequate cooling

The enclosure design must ensure adequate cooling for the drive. The maximum ambient air temperature around the drive should not exceed 50° C. However, to achieve maximum reliabil- ity, the ambient temperature should be about 15° C below this value most of the time.

The drive’s product manual (77767528) 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.

Figure 4 shows two design approaches with one or more fans used to generate air flow. The air-flow patterns can be created by the fans either pushing or drawing air. The overall flow pattern can be directed from front to back, back to front, or side to side.

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Contents Barracuda Disc Drive ST136475LW/LC Contents Electrostatic discharge protection PrefaceImportant safety information and precautions Page Wichtige Sicherheitshinweise Page Barracuda 36 Installation Guide, Rev. B Electromagnetic susceptibility Regulatory agency complianceElectromagnetic compliance Australian C-Tick Electromagnetic compliance for the European UnionSeagate Technology support services Presales Support Customer Service CSO European Support Services Africa/Middle East Support Services SeaFAX General description RPM Drive characteristicsST136475LW/LC DC power requirements Amps, multimodeDimensions of the drive General information Drive modelsScsi ID jumpers Drive termination Circuits and data path widths Terminator powerPage Cable characteristics for single-ended I/O Circuits Cable characteristics for differential I/O circuits Sixty-eight pin connection to drive Multiple-drive connection to host adapter Drive model LC with single 80-pin I/O and power connector Providing adequate cooling Kü hlung des Systems Suggested air flow Abbildung 4. Empfohlener Luftstromverlauf Installation des Laufwerkes und Anschluß der Kabel Mounting the drive and connecting cablesPage DC power connector Abbildung 5. Gleichstromanschluß Hinweis Barracuda 36 Installation Guide, Rev. B Mounting configuration dimensions Quick reference desktop system notes Formatting the driveTerminating the drive Setting the Scsi ID jumpersSetting the Scsi ID on model LW drives Host Alternate Additional jumper options for LW drives Other applicable jumper optionsAdditional jumper option for LW drives LC drives Jumper options for LC drives Single-ended/low-voltage-differential selection Additional jumper option for LC drives Page