Seagate ST3750840ACE Acoustics, Fluid Dynamic Bearing FDB motor acoustics, Idle CE seek profile

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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 4:	Fluid Dynamic Bearing (FDB) motor acoustics

		Idle*	CE seek profile

ST3750840ACE		2.8 bels (typ)	2.9 bels (typ)
		3.0 bels (max)	3.0 bels (max)

ST3500830ACE		2.8 bels (typ)	2.9 bels (typ)
		3.0 bels (max)	3.0 bels (max)

ST3400820ACE		2.7 bels (typ)	2.8 bels (typ)
		2.9 bels (max)	2.9 bels (max)

ST3320820ACE		2.7 bels (typ)	2.8 bels (typ)
		2.9 bels (max)	2.9 bels (max)

ST3300820ACE		2.5 bels (typ)	2.7 bels (typ)
		2.7 bels (max)	2.8 bels (max)

ST3250820ACE		2.5 bels (typ)	2.7 bels (typ)
		2.7 bels (max)	2.8 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.

16	DB35.3 Series PATA Product Manual, Rev. B

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Contents DB35.3 Series Pata Page Contents DB35.3 Series Pata Product Manual, Rev. B List of Figures DB35.3 Series Pata Product Manual, Rev. B Introduction DB35.3 Series Pata Product Manual, Rev. B Drive specifications Specification summary tableDrive specification ST3750840ACE ST3500830ACE ST3400820ACE DB35.3 Series Pata Product Manual, Rev. B Drive specification ST3320820ACE ST3300820ACE ST3250820ACE DB35.3 Series Pata Product Manual, Rev. B Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383Recording and interface technology Physical characteristicsDrive specification 750GB 500GB 400GB 320GB 300GB 250GBSeek time Power specificationsStart/stop times Standby mode DC power requirementsTypical current profile Conducted noiseIdle mode Power-management modesActive mode Sleep modeEnvironmental specifications Nonoperating shock Disc models ShockOperating shock 4 Disc modelsFluid Dynamic Bearing FDB motor acoustics AcousticsIdle CE seek profile Reliability Safety certificationElectromagnetic immunity Agency certificationAustralian C-Tick N176 Electromagnetic compatibilityKorean RRL FCC verificationCorrosive environment Environmental protectionEuropean Union Restriction of Hazardous Substances RoHS DB35.3 Series Pata Product Manual, Rev. B Configuring and mounting the drive Handling and static discharge precautionsBreather filter hole precautions Breather filter hole locationDrive as master with a non-ATA-compatible slave Jumper settingsMaster/slave configuration Cable-select optionDrive mounting Ultra ATA/100 cableMounting dimensions-top, side and end view DB35.3 Series Pata Product Manual, Rev. B Pins and supported ATA signals ATA interface signals and connector pinsATA interface Supported ATA commands Command name Command code in hexF4H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordSet Features command 0CH4 S.M.A.R.T. commands Code in features Register A.R.T. commandPresales Support Seagate Technology support servicesInternet Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index Page TMR DB35.3 Series Pata Product Manual, Rev. B Page Seagate Technology LLC

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