Acoustics, Idle CE seek profile | Seagate ST3250820ACE guide

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 table Drive 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 16,383 Physical characteristics Drive specificationRecording and interface technology 750GB 500GB 400GB 320GB 300GB 250GB Power specifications Seek timeStart/stop times Standby mode DC power requirements Typical current profile Conducted noise Power-management modes Active modeIdle mode Sleep mode Environmental specifications Shock Operating shockNonoperating shock Disc models 4 Disc models Acoustics Fluid Dynamic Bearing FDB motor acousticsIdle CE seek profile Safety certification Electromagnetic immunityReliability Agency certification Electromagnetic compatibility Korean RRLAustralian C-Tick N176 FCC verification Environmental 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 precautions Breather filter hole precautions Breather filter hole location Jumper settings Master/slave configurationDrive as master with a non-ATA-compatible slave Cable-select option Drive mounting Ultra ATA/100 cable Mounting dimensions-top, side and end view DB35.3 Series Pata Product Manual, Rev. C ATA interface signals and connector pins Pins and supported ATA signals Supported ATA commands Command name Command code in hex F4H Identify Device command Word Description Value Xx07H Description if bit is set to Bit Word Bit Word Set Features command 0CH 4 S.M.A.R.T. commands Code in features Register A.R.T. command Warranty Service Internet MySeagate Spp.seagate.comPresales Support Technical Support Data Recovery Services Authorized Service Centers Data Recovery Services FAX 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