Seagate ST9400321AS, ST9640320AS, ST9640322AS manual Drive mounting, Top cover stiffness/deflection

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4.4Drive mounting

You can mount the drive using four screws in the side-mounting holes or four screws in the bottom-mounting holes. See Figure 4 for drive mounting dimensions. Follow these important mounting precautions when mount- ing the drive:

•Allow a minimum clearance of 0.030in (0.76 mm) around the entire perimeter of the drive for cooling.

•Use only M3 UNC mounting screws.

•Do not overtighten the mounting screws. Maximum torque: 4.0 in-lb (0.4519 N-m).

•Four (4) threads (0.080in, 2.032 mm) minimum screw engagement recommended.

•Avoid excessive drive distortion when mounting. Refer to the following specifications for stiffness/deflection information:

Top cover stiffness/deflection

Operating with no performance degradation, emitted noise,	10 mm probe: 1.5kgf or
mechanical damage, or hard errors	5 mm probe: 0.92kgf

Non-operating with no hard errors	20 mm probe: 2kgf at any point of top cover
	20 mm probe: 15kgf at top cover edges only

Momentus Product Manual, Rev. D

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Contents Momentus Revision Date Revision historyContents Momentus Product Manual, Rev. D List of Figures Page Seagate Online Support and Services Seagate Technology support servicesIntroduction 4K byte/sector modelsByte/sector models About the Serial ATA interface Drive specifications Specification summary tableDrive specifications for 640, 500 and 400GB models To 12,192 m -1000 ft to 40,000 ft Drive specifications for 320, 250 and 160GB models Drive specifications for 320, 250 and 160GB models Physical organization Default logical geometryLBA mode Formatted capacityTypical seek times Physical characteristicsRecording and interface technology Seek timeStart/stop times Power specificationsVoltage tolerance Typical current profileDeferred spinup Conducted noiseIdle mode Power-management modesPower management modes Active modeEnvironmental specifications Vibration ShockOperating shock Nonoperating shockTest for Prominent Discrete Tones PDTs Drive A-weighted Sound Power Levels SWL, BAAcoustics Electromagnetic immunityAgency certification Safety certificationMeasurement type Specification ReliabilityKorean RRL Australian C-Tick N176FCC verification China Restriction of Hazardous Substances RoHS Directive Environmental protectionCorrosive environment European Union Restriction of Hazardous Substances RoHSHandling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveTop cover stiffness/deflection Drive mountingMeasurements shown in are in inches Segment Pin Function Definition Serial ATA connector pin definitionsSignal Serial ATA Sata interfaceP10 Ground 2nd mate P11 Reserved Pin Function DefinitionCommand name Command code in hex ATA-standard commands Supported ATA commandsATA-standard security commands Command name Command code in hexWord Description Value Identify Device commandXx07H Description if bit is set to Bit Set Features command values Set Features command3 S.M.A.R.T. commands M.A.R.T. commandsCode in features register A.R.T. command Momentus Product Manual, Rev. D Index Page Page Momentus Product Manual, Rev. D Page Seagate Technology LLC