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Seagate LD25 Product Manual - Page 11

Formatted capacity, Default logical geometry, Physical organization, Recording and interface

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2.2 Formatted capacity Model ST9402115AS ST920217AS Formatted capacity* 40 Gbytes 20 Gbytes Guaranteed sectors 82,443,600 41,021,800 Bytes per sector 512 512 *One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. 2.3 Default logical geometry Cylinders 16,383 Read/write heads 16 Sectors per track 63 LBA mode When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n-1, where n is the number of guaranteed sectors as defined above. 2.4 Physical organization Drive model ST9402115AS ST920217AS Read/write heads 2 1 Number of discs 1 1 2.5 Recording and interface technology Interface 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 (Mbytes/sec) I/O data-transfer rate (Mbytes/sec max) Interleave Cache buffer Serial ATA (SATA) 675,900 114,000 81 5,400 57.6 150 (SATA 1.0) 1:1 2 Mbytes (2,048 kbytes) LD25 Series SATA Product Manual, Rev. C 5

Section	Page
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
2.3 Default logical geometry	11
2.4 Physical organization	11
2.5 Recording and interface technology	11
2.6 Physical characteristics	12
2.7 Seek time	12
2.8 Time to ready	12
2.9 Power specifications	13
2.9.1 Power consumption	13
2.9.1.1 Typical current profile	14
2.9.2 Deferred spinup	14
2.9.3 Conducted noise	15
2.9.4 Voltage tolerance	15
2.9.5 Power-management modes	15
2.10 Environmental specifications	17
2.10.1 Ambient temperature	17
2.10.2 Temperature gradient	17
2.10.3 Humidity	17
2.10.3.1 Relative humidity	17
2.10.3.2 Wet bulb temperature	17
2.10.4 Altitude	17
2.10.5 Shock	18
2.10.5.1 Operating shock	18
2.10.5.2 Nonoperating shock	18
2.10.6 Vibration	18
2.10.6.1 Operating vibration	18
2.10.6.2 Nonoperating vibration	18
2.11 Acoustics	19
2.12 Electromagnetic immunity	19
2.13 Reliability	20
2.14 Agency certification	20
2.14.1 Safety certification	20
2.14.2 Electromagnetic compatibility	20
2.14.3 FCC verification	21
2.15 Environmental protection	22
2.15.1 European Union Restriction of Hazardous Substances (RoHS)	22
2.16 Corrosive environment	22
3.0 Configuring and mounting the drive	23
3.1 Handling and static-discharge precautions	23
3.2 Configuring the drive	24
3.3 Serial ATA cables and connectors	24
3.4 Drive mounting	25
4.0 Serial ATA (SATA) interface	27
4.1 Hot-Plug compatibility	27
4.2 Serial ATA device plug connector pin definitions	27
4.3 Supported ATA commands	29
4.3.1 Identify Device command	32
4.3.2 Set Features command	35
4.3.3 S.M.A.R.T. commands	36
5.0 Seagate Technology support services	37
A	39
B	39
C	39
D	39
E	39
F	39
G	39
H	40
I	40
K	40
L	40
M	40
N	40
O	40
P	40
Q	40
R	40
S	41
T	41
U	41
V	41