Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate
Technology LLC in the United States and/or other countries. LD25 Series, SeagateSeaBOARD, SeaFONE, SeaTDD, and SeaTools are either trademarks or registered trademarks of Seagate Technology LLC or one of its af filiate d comp a nies in the United States and/
or other countries. All other trademarks or registered trademarks are the property of their
respective owners.
One gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion
bytes when referring to hard drive capacity. Accessible capacity may vary depending on
operating environment and formatting. Quantitative usage examples for various applications
are for illustrative p urpo ses. Actual quan tities w ill vary based on vari ou s factors, including fi le
size, file format, features and application software. Seagate reserves the right to change,
without notice, product offerings or specifications.
• State-of-the-art cache and on-the-fly error-correction algorithms
• Full-track multiple-sector transfer capability without local processor intervention
• Quiet operation
•500 Gs nonoperating shock
• The 3D Defense System™ (Drive Defense, Data Defense, and Diagnostic Defense) provides the industry’s
most comprehensive protection for disc drives
• Support for S.M.A.R.T. drive monitoring and reporting
• Support for Read Multiple and Write Multiple commands
2
LD25 Series 5400.2 Product Manual, Rev. E
LD25 Series 5400.2 Product Manual, Rev. E
3
2.0Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate
ST980210A, ST980210AS, ST940210A and ST940210AS model drives.
2.1Specification summaries
The specification s li sted in th e fo l lowing tw o t ables are pr ovided for quick refe rence. For det ails on specific ation
measurement or definition, see the appropriate section of this manual.
Table 1: Specification summary for ATA/PATA (Parallel ATA) models
Drive specificationST980210AST940210A
Formatted Gbytes (512 bytes/sector)*8040
Guaranteed sectors156,301,48878,140,160
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Spindle speed (RPM)5,400
Internal transfer rate (Mbits/sec max)352
I/O data-transfer rate (Mbytes/sec max)100
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer (Mbytes)2
Height9.5 ± 0.2 mm (0.374 ± .008 inches)
Width69.85 ± 0.25 mm (2.750 ± 0.010 inches)
Length100.2 ± 0.25 mm (3.945 ± 0.010 inches)
Weight (typical)100 grams (0.22 lb)
Average latency (msec)5.6
Power-on to ready (sec typical)3.0
Standby to ready (sec typical)3.0
Track-to-track seek time (msec typical)1.0 (read), 1.5 (write)
Average seek, read (msec typical)<14
Average seek, write (msec typical)<15
Full-stroke seek (msec)<23 (read); <26 (write)
Startup current 5V (amps typical) (max = +/- 10%)1.0
Seek power, random r/w, desktop usage (watts, typical)2.3
Idle mode (watts, typical)1.95
Standby and sleep modes (watts, typical)≤ 0.25
Multiword DMA modes 0–2
Ultra DMA modes 0–5
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LD25 Series 5400.2 Product Manual, Rev. E
Table 1: Specification summary for ATA/PATA (Parallel ATA) models
Drive specificationST980210AST940210A
Voltage tolerance (including noise)5V ± 5%
Ambient temperature0° to 60°C (operating), –40° to 70°C (nonoperating)
Temperature gradient
(°C per hour max, noncondensing)
Relative humidity
(noncondensing)
Relative humidity gradient30% per hour max
Wet bulb temperature (°C max)30°C (operating)
Altitude, operating–304.8 m to 3,048 m (–1000 ft to 10,000 ft)
Altitude, nonoperating (below mean sea level, max)–304.8 m to 12,192 m (–1,000 ft to 40,000 ft)
Shock, operating (Gs max at 2 msec)175
Shock, nonoperating (Gs max at 2 msec)500
Shock, nonoperating (Gs max at 1 msec)350
Shock, nonoperating (Gs max at 0.5 msec)200
Vibration, operating0.5 G (5–350 Hz)
Vibration, nonoperating5 Gs (10–350 Hz)
Drive acoustics, sound power (Bels)
Idle**2.4 (typical)
Seek2.6 (typical)
Nonrecoverable read errors1 per 1014 bits read
Annualized Failure Rate (AFR)<0.6%, Desktop and gaming, 2400 Power-on-hours
WarrantyTo determine the warranty for a specific drive, use a web browser to access
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
*Duri ng p eriod s of dri ve id le, some offl ine a c tivity m ay occur , accor di ng to the S.M.A .R .T. speci fic ation , w hich may incr ease acoustic and
power to operational levels.
20°C (operating)
30°C (nonoperating)
8% to 90% (operating)
5% to 95% (nonoperating)
40°C (nonoperating)
0.25 G (351–500 Hz)
1.0 G (351–500 Hz)
<2.0%, PRV/DVR, 8760 Power-on-hours
the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Y our Warranty” link. You will be asked to
provide the drive serial number, model number (or part number) and country
of purchase. The system will display the warranty information for your drive.
50,000
20,000
LD25 Series 5400.2 Product Manual, Rev. E
5
Table 2: Specifications for SATA (Serial ATA) models
Drive specificationST980210ASST940210AS
Formatted Gbytes (512 bytes/sector)*8040
Guaranteed sectors156,301,48878,140,160
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Spindle speed (RPM)5,400
Internal transfer rate (Mbits/sec max)352
I/O data-transfer rate (Mbytes/sec max)150
ATA data-transfer modes supportedPIO modes 0–4
Cache buffer (Mbytes)2
Height9.5 ± 0.2 mm (0.374 ± .008 inches)
Width69.85 ± 0.25 mm (2.750 ± 0.010 inches)
Length100.2 ± 0.25 mm (3.945 ± 0.010 inches)
Weight (typical)100 grams (0.22 lb)
Average latency (msec)5.6
Power-on to ready (sec typical)3.0
Standby to ready (sec typical)3.0
Track-to-track seek time (msec typical)1.0 (read), 1.5 (write)
Average seek, read (msec typical)<14
Average seek, write (msec typical)<15
Full-stroke seek (msec)<23 (read); <26 (write)
Startup current 5V (amps typical) (max = +/- 10%)1.0
Seek power, random r/w, desktop usage (watts, typical)2.9
Idle mode (watts, typical)2.5
Standby and sleep modes (watts, typical)≤1.15
Voltage tolerance (including noise)5V ± 5%
Ambient temperature0° to 60°C (operating), –40° to 70°C (nonoperating)
Temperature gradient
(°C per hour max, noncondensing)
Relative humidity
(noncondensing)
Relative humidity gradient30% per hour max
Wet bulb temperature (°C max)30°C (operating)
Altitude, operating–304.8 m to 3,048 m (–1000 ft to 10,000 ft)
Altitude, nonoperating (below mean sea level, max)–304.8 m to 12,192 m (–1,000 ft to 40,000 ft)
Shock, operating (Gs max at 2 msec)175
Shock, nonoperating (Gs max at 2 msec)500
Shock, nonoperating (Gs max at 1 msec)350
Shock, nonoperating (Gs max at 0.5 msec)200
Vibration, operating0.5 G (5–350 Hz)
Vibration, nonoperating5 Gs (10–350 Hz)
Multiword DMA modes 0–2
Ultra DMA modes 0–5
20°C (operating)
30°C (nonoperating)
8% to 90% (operating)
5% to 95% (nonoperating)
40°C (nonoperating)
0.25 G (351–500 Hz)
1.0 G (351–500 Hz)
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LD25 Series 5400.2 Product Manual, Rev. E
Table 2: Specifications for SATA (Serial ATA) models
Drive specificationST980210ASST940210AS
Drive acoustics, sound power (Bels)
Idle**2.4 (typical)
Seek2.6 (typical)
Nonrecoverable read errors1 per 1014 bits read
Annualized Failure Rate (AFR)<0.6% (Desktop and gaming: 2400 power-on-hours)
WarrantyTo determine the warranty for a specific drive, use a web browser to access
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
*Duri ng p eriod s of dri ve id le, some offl ine a c tivity m ay occur , accor di ng to the S.M.A .R .T. speci fic ation , w hich may incr ease acoustic and
power to operational levels.
<2.0% (PVR/DVR: 8760 power-on-hours)
the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Y our Warranty” link. You will be asked to
provide the drive serial number, model number (or part number) and country
of purchase. The system will display the warranty information for your drive.
50,000
20,000
2.2Formatted capacity
ModelFormatted capacity*Guaranteed sectors Bytes per sector
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.
2.3Default logi cal geometry
CylindersRead/write headsSectors per track
16,3831663
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.
LD25 Series 5400.2 Product Manual, Rev. E
7
2.4Recordin g and interface technology
InterfaceParallel ATA
Recording density BPI (bits/inch typical)829,700
Track density TPI (tracks/inch typical)143,600
Areal density (Gbits/inch2 max)130
Spindle speed (RPM) (± 0.2%)5,400
Internal transfer rate (Mbits/sec max)352
I/O data-transfer rate (Mbytes/sec max)
PATA
SATA
Interleave1:1
Cache buffer2 Mbytes (2,048 kbytes)
100 (Ultra DMA mode 5)
150
2.5Physical characteristics
Height(mm)
(inches)
Width(mm)
(inches)
Length(mm)
(inches)
Typical weight(grams)
(pounds)
9.5 ± 0.2
0.374
± 0.008
69.85 ± 0.25
2.750 ± 0.010
100.2 ± 1.45
3.945 ± 0.057
100
0.22
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LD25 Series 5400.2 Product Manual, Rev. E
2.6Seek time
Seek measurem ent s a re t ake n wi th nom inal po w er a t 25 °C amb ient temperature. All tim es a re m easu red using
drive diagnostics. The specifications below are defined as follows:
• Track-to-track seek time is an average of all possible single-track seeks in both directions.
• Average seek time is a true statistical random average of at least 5,000 measurements of seeks between
random tracks, less overhead.
T yp ical seek times (msec)Read Write
Track-to-track1.01.5
Average<15<15
Full-stroke<23<26
Average latency5.65.6
Note.These driv es ar e d es ig ne d t o con si sten tl y me et th e s ee k t imes re pre se nted in th i s m anual . Phy si cal se ek s,
regardless of mode (such as track-to-track and average), are expected to meet or exceed the noted values.
However, due to the manner in which these drives are formatted, benchmark tests that include command
overhead or measure logical seeks may produce results that vary from these specifications.
2.7Time to ready
Time to readyTypical
Power-on to Ready (sec)3.08.0
St andby to Ready (sec)3.08.0
Max @ 25°C
LD25 Series 5400.2 Product Manual, Rev. E
9
2.8Power specifications
The drive receives DC power (+5V) through the 4-pin power connector.
2.8.1Power consumption
Power requiremen ts for the dr iv es are listed i n the ta ble on p age 9. Typical power measurements are ba sed on
an average of drives tested, under nominal conditions, at 25°C ambient temperature.
• Spinup power
Spinup power is measured from the time of power-on to the time that the drive spindle re aches operating speed.
• Seek mode
During seek mod e, the read /write actuator arm move s toward a spe cific positi on on the d isc surface and does
not execute a read or write operati on. Servo ele ctronics ar e acti ve. Seek mode power is mea sure d based on
three random seek operations every 100 msecs. This mode is not typical.
• Read/write power and current
Read/write power is measured with the heads on track, based on three 63 sector read or write operations
every 100 msecs.
• Idle mode power*
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in
a random track location.
• Standby mode
During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/
write electronics are in power-down model
T a ble 3: DC power
Power di s s ipation+5V average (25° C)
Spinup (typical)1.0 Amp
Seek, random r/w, desktop usage
PATA
SATA
Idle*
PATA
SATA
Standby and sleep modes
PATA
SATA
*During periods of drive i dle, some offl ine activity may occur acc ording to the S. M.A.R.T. speci fica tion, which may i ncrease acoust ic and
power to operational levels.
2.3 Watts
2.9 Watts
1.95 Watts
2.5 Watts
≤ 0.25 Watts
≤ 1.15 Watts
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