Seagate ST3250820ACE 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. C

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Contents DB35.3 Series Pata Page DB35.3 Series Pata Page Contents DB35.3 Series Pata Product Manual, Rev. C List of Figures DB35.3 Series Pata Product Manual, Rev. C Introduction DB35.3 Series Pata Product Manual, Rev. C Drive specifications Specification summary tableDrive specification ST3750840ACE ST3500830ACE ST3400820ACE DB35.3 Series Pata Product Manual, Rev. C Drive specification ST3320820ACE ST3300820ACE ST3250820ACE DB35.3 Series Pata Product Manual, Rev. C Default logical geometry LBA modeFormatted capacity Cylinders Read/write heads Sectors per track 16,383Physical characteristics Drive specificationRecording and interface technology 750GB 500GB 400GB 320GB 300GB 250GBPower specifications Seek timeStart/stop times Standby mode DC power requirementsTypical current profile Conducted noisePower-management modes Active modeIdle mode Sleep modeEnvironmental specifications Shock Operating shockNonoperating shock Disc models 4 Disc modelsAcoustics Fluid Dynamic Bearing FDB motor acousticsIdle CE seek profile Safety certification Electromagnetic immunityReliability Agency certificationElectromagnetic compatibility Korean RRLAustralian C-Tick N176 FCC verificationEnvironmental protection Corrosive environmentEuropean Union Restriction of Hazardous Substances RoHS DB35.3 Series Pata Product Manual, Rev. C Configuring and mounting the drive Handling and static discharge precautionsBreather filter hole precautions Breather filter hole locationJumper settings Master/slave configurationDrive as master with a non-ATA-compatible slave Cable-select optionDrive mounting Ultra ATA/100 cableMounting dimensions-top, side and end view DB35.3 Series Pata Product Manual, Rev. C ATA interface signals and connector pins Pins and supported ATA signalsSupported 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. commandWarranty Service Internet MySeagate Spp.seagate.comPresales Support Technical SupportData Recovery Services Authorized Service Centers Data Recovery ServicesFAX services-All Europe toll call Call center Presales and Technical Support Warranty ServiceToll-free support numbers Asia/Pacific support services Index Page Page DB35.3 Series Pata Product Manual, Rev. C Page Seagate Technology LLC

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