Seagate ST3320820NS manual Acoustics, Vibration, Operating vibration, Nonoperating vibration

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2.9.6Vibration

All vibration specifications assume that the drive is mounted securely with the input vibration applied at the drive mounting screws. Vibration may be applied in the X, Y or Z axis.

2.9.6.1Operating vibration

The maximum vibration levels that the drive may experience while meeting the performance standards speci- fied in this document are specified below.

5–22 Hz	0.25	Gs (Limited displacement)

22–350 Hz	0.50 Gs

350–500 Hz	0.25	Gs

2.9.6.2Nonoperating vibration

The maximum nonoperating vibration levels that the drive may experience without incurring physical damage or degradation in performance when subsequently put into operation are specified below.

5–22 Hz	0.25 Gs (limited displacement)

22–350 Hz	5.0 Gs

350–500 Hz	1.0 Gs

2.10Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea- surements are consistent with ISO document 7779. Sound power measurements are taken under essentially free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.

Note. For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is defined by the following equation:

(Number of seeks per second = 0.4 / (average latency + average access time)

Table 7:	Fluid Dynamic Bearing (FDB) motor acoustics

		Idle*	Performance seek

ST3750640NS, ST3750840NS		2.7 bels (typ)	3.2 bels (typ)
		3.0 bels (max)	3.9 bels (max)

ST3500630NS, ST3500830NS		2.5 bels (typ)	3.2 bels (typ)
		2.8 bels (max)	3.5 bels (max)

ST3400620NS, ST3400820NS		2.5 bels (typ)	3.2 bels (typ)
ST3320620NS, ST3320820NS		2.8 bels (max)	3.5 bels (max)

ST3250620NS, ST3250820NS		2.5 bels (typ)	3.2 bels (typ)
		2.8 bels (max)	3.5 bels (max)

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

Barracuda ES Serial ATA Product Manual, Rev. D

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Contents Barracuda ES Serial ATA Revision Date Revision historyContents Barracuda ES Serial ATA Product Manual, Rev. D List of Figures Page Introduction About the Serial ATA interface Specification summary tables Drive specificationsDrive specification ST3750640NS ST3750840NS Drive specifications summary for 750 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3500630NS ST3500830NS Drive specifications summary for 500 Gbyte modelsFollowing web Drive specification ST3400620NS ST3400820NS Drive specifications summary for 400 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3320620NS ST3320820NS Drive specifications summary for 320 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Drive specification ST3250620NS ST3250820NS Drive specifications summary for 250 Gbyte modelsBarracuda ES Serial ATA Product Manual, Rev. D Cylinders Read/write heads Sectors per track 16,383 Default logical geometryLBA mode Formatted capacityPhysical characteristics Recording and interface technology750GB 500GB 400GB 320GB 250GB Seek time Start/stop timesTypical seek times msec Read Write Power specifications Typical current profiles Conducted noiseVoltage tolerance Sleep mode Power-management modesActive mode Idle modeEnvironmental specifications Nonoperating vibration AcousticsVibration Operating vibrationElectromagnetic immunity Radio frequency environmentsTest Description Performance level Reference standard Electromagnetic compatibility Safety certificationReliability Agency certificationKorean RRL Australian C-Tick N176FCC verification Environmental protection Corrosive environmentChina Restriction of Hazardous Substances RoHS Directive Barracuda ES Serial ATA Product Manual, Rev. D Handling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewBarracuda ES Serial ATA Product Manual, Rev. D Hot-Plug compatibility Serial ATA Sata interfacePin Function Definition Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions SignalSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Word Description Value Identify Device commandXx07H 128 Security status 0001H 129 Seagate-reserved Bit Word Description if bit is set to Bit WordSet Features command values Set Features command3 S.M.A.R.T. commands M.A.R.T. commandsCode in features register A.R.T. command Internet Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index ITE Page Barracuda ES Serial ATA Product Manual, Rev. D Page Disc Drive, Scotts Valley, California 95066-4544, USA

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