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Seagate ST9500420AS Momentus 7200.4 SATA Product Manual - Page 12

Recording and interface technology, Physical characteristics - rpm

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2.5 Recording and interface technology Interface Recording method Recording density BPI (bits/inch max) Track density TPI (tracks/inch max) Areal density (Gbits/inch2 max) Spindle speed (RPM) (± 0.2%) Maximum Internal transfer rate (Gbits/sec) I/O data-transfer rate (Gbits/sec max) Interleave Cache buffer 2.6 Physical characteristics Drive specification Height (mm) (inches) Width (mm) (inches) Length (mm) (inches) Typical weight ST9500420AS ST9500420ASG ST9320423AS ST9320423ASG ST9250410AS ST9250410ASG ST9160412AS ST9160412ASG ST9120410AS ST9120410ASG 9.5 +/-0.2 0.370 +/-0.008 69.85 +/-0.25 2.750 +/-0.010 100.35 +0.20 / -0.25 3.951 +0.008 / -.010 110 grams 0.238 pounds 105 grams 0.227 pounds Serial ATA (SATA) Perpendicular 1,490k 265k 394 7,200 1.23 3.0 1:1 16 Mbytes (16,384 kbytes) 6 Momentus 7200.4 SATA Product Manual, Rev. A

Section	Page
Contents	3
1.0 Introduction	7
1.1 About the Serial ATA interface	8
2.0 Drive specifications	9
2.1 Specification summary table	9
2.2 Formatted capacity	11
2.2.1 LBA mode	11
2.3 Default logical geometry	11
2.4 Physical organization	11
2.5 Recording and interface technology	12
2.6 Physical characteristics	12
2.7 Seek time	13
2.8 Start/stop times	13
2.9 Power specifications	13
2.9.1 Power consumption	13
2.9.1.1 Typical current profile	14
2.9.2 Conducted noise	15
2.9.3 Voltage tolerance	15
2.9.4 Power-management modes	16
2.10 Environmental specifications	17
2.10.1 Ambient temperature	17
2.10.2 Temperature gradient	17
2.10.3 Relative humidity	17
2.10.4 Wet bulb temperature	17
2.10.5 Altitude	17
2.10.6 Shock	17
2.10.6.1 Operating shock	17
2.10.6.2 Nonoperating shock	18
2.10.7 Vibration	18
2.10.7.1 Operating vibration	18
2.10.7.2 Nonoperating vibration	18
2.11 Acoustics	18
2.12 Electromagnetic immunity	19
2.13 Reliability	19
2.13.1 Free Fall Protection feature	19
2.14 Agency certification	20
2.14.1 Safety certification	20
2.14.2 Electromagnetic compatibility	20
2.14.3 FCC verification	20
2.15 Environmental protection	22
2.15.1 European Union Restriction of Hazardous Substances (RoHS)	22
2.15.2 China Restriction of Hazardous Substances (RoHS) Directive	22
2.16 Corrosive environment	22
3.0 Configuring and mounting the drive	25
3.1 Handling and static-discharge precautions	25
3.2 Configuring the drive	26
3.3 Serial ATA cables and connectors	26
3.4 Drive mounting	27
4.0 Serial ATA (SATA) interface	29
4.1 Hot-Plug compatibility	29
4.2 Serial ATA device plug connector pin definitions	29
4.3 Supported ATA commands	31
4.3.1 Identify Device command	33
4.3.2 Set Features command	37
4.3.3 S.M.A.R.T. commands	38