Seagate 2.5-inch, Low-profile Disc Drives LD25 Series,ST9402115A,ST920217A Product Manual

Product Manual

LD25 Series

ST9402115A
ST920217A

100371274
Rev . C
August 2007

©2005-2007, Seagate Technology LLC All rights reserved.
Publication number: 100371274, Rev. C
August 2007

Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC
in the United States and/or other countries. LD25 Series, SeaTools and SeaTDD are either trademarks or
registered trademarks of Seagate Technology LLC or one of its affiliated companies 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 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 purposes. Actual quantities will vary based on various factors, including file
size, file format, features and application software. Seagate reserves the right to change, without notice,
product offerings or specifications.

LD25 Series PATA Product Manual, Rev. C

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Contents

1.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Specification summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.4 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.5 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.6 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.7 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.8 Time to ready. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.9 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.9.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.9.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.9.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.9.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.10 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.10.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.10.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.10.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.10.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.10.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.10.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.11 Acoustics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.12 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.13 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.14 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.14.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.14.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.14.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.15 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.15.1 European Union Restriction of Hazardous Substances (RoHS) . . . . . . . . . . . . 15

2.16 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.1 Handling and static discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.2 Jumper settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.2.1 Master/slave configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.2.2 Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1 ATA interface signals and connector pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.1.1 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.1.2 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.1.3 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

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LD25 Series PATA Product Manual, Rev. C

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List of Figures

Figure 1. Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 2. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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LD25 Series PATA Product Manual, Rev. C

LD25 Series PATA Product Manual, Rev. C

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1.0 Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate® LD25
Series drives:

• ST9402115A

• ST920217A
Seagate LD25 Series drives comprise a new product category of 2.5-inch form factor drives designed for non-

notebook PC applications such as:

• Consumer electronics (gaming, small PVRs/DVRs)

• Ultra-small desktop PCs

• Internet appliances
LD25 Series drives are quieter, lighter and use less power than 3.5-inch drives. They are ideal for applications

requiring the form and fit of a notebook drive but without some of the design specifications required by note­book drives such as high shock tolerance, high performance, and power management. LD25 Series drives are
not presently suited for notebook applications or environments with high operating temperatures.

These drives provide the following key features:

• 5,400-RPM spindle speed

• 2-Mbyte buffer

• High instantaneous (burst) data transfer rates (up to 100 Mbytes per second) using Ultra DMA mode 5.

• Tunneling Magnetoresistive (TMR) recording heads.

• 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.

• SeaTools™ diagnostic software performs a drive self-test that eliminates unnecessary drive returns.

• The 3D Defense S ystem ™, which i nclude s Drive D efen se, Dat a Defe nse, and Diagnostic Defense , of fers 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.

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LD25 Series PATA Product Manual, Rev. C

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2.0 Drive 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
ST9402115A and ST920217A model drives.

2.1 Specification summary

The specifications listed in this table are for quick reference. For details on specification measurement or
definition, see the appropriate section of this manual.

T a ble 1: S pecifications

Drive specification ST9402115A ST920217A

Formatted Gbytes (512 bytes/sector)* 40 20
Guaranteed sectors 82,443,600 41,021,800
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Physical read/write heads 2 1
Discs 1 1
Recording density, BPI (bits/inch typical) 675,900
Track density. TPI (tracks/inch typical) 114,000
Areal density (Gbits/inch2 max) 81
Spindle speed (RPM) 5,400
Internal data transfer rate OD (Mbytes/sec max) 57.6
I/O data-transfer rate (Mbytes/sec max) 100
ATA data-transfer modes supported PIO modes 0–4

Cache buffer (Mbytes) 2
Height 9.5 +/-0.2 mm (0.374 +/-.008 inches)
Width 69.85 +/-0.25 mm (2.750 +/-0.010 inches)
Length 100.2 +/-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) 4.0
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) <16
Average seek, write (msec typical) <16

Multiword DMA modes 0–2
Ultra DMA modes 0–5

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LD25 Series PATA Product Manual, Rev. C

T a ble 1: S pecifications

Drive specification ST9402115A ST920217A

Full-stroke seek (msec) 22 (typical); 24 (max)
Startup current 5V (amps typical) (max = +/- 10%) 1.0
Seek power, random r/w, desktop usage (watts, typical) 2.3
Idle mode (watts, typical) 2.0
Standby and sleep modes (watts, typical) <0.5
Voltage tolerance (including noise) 5V ± 5%
Ambient temperature 5° to 55°C (operating), –40° to 70°C (nonoperating)
Temperature gradient

(°C per hour max, noncondensing)
Relative humidity

(noncondensing)
Relative humidity gradient 30% 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) 100
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, operating 0.5 G (22–350 Hz)

Vibration, nonoperating 5 Gs (0 to peak, 22–350 Hz)

Drive acoustics, sound power (bels), 2 disc
Idle** 2.4 (typical)
Seek 2.7 (typical)
Nonrecoverable read errors 1 per 1014 bits read
Annualized Failure Rate (AFR) <1.0%, Desktop and gaming use
Service life 5 Y ears
Warranty To determine the warranty for a specific drive, use a web browser to access

Load/Unload (U/UL) cycles
Controlled L/UL cycles
(40°C, 50% relative humidity)
Emergency L/UL cycles
(40°C, 50% relative humidity)

*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)

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

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2.2 Formatted capacity

Model Formatted capacity* Guaranteed sectors Bytes per sector

ST9402115A 40 Gbytes 82,443,600 512
ST920217A 20 Gbytes 41,021,800 512

*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 logi cal geometry

Cylinders Read/write heads Sectors per track

16,383 16 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

Model Read/write heads Number of discs

ST9402115A 2 1
ST920217A 1 1

2.5 Recording and interfac e technology

Interface Parallel ATA
Recording density BPI (bits/inch typical) 675,900
Track density TPI (tracks/inch typical) 114,000
Areal density (Gbits/inch2 max) 81
Spindle speed (RPM) (± 0.2%) 5,400
Internal data-transfer rate OD (Mbytes/sec max) 57.6
I/O data-transfer rate (Mbytes/sec max) 100 (Ultra DMA mode 5)
Interleave 1:1
Cache buffer 2 Mbytes (2,048 kbytes)

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LD25 Series PATA Product Manual, Rev. C

2.6 Physical 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

2.7 Seek 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-track <2 <2
Average <16 <16
Full-stroke <24 <24
Average latency 5.6 5.6

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.

2.8 Tim e to ready

Time to ready Typical

Power-on to Ready (sec) 4.0 8.0
St andby to Ready (sec) 3.0 8.0

Max @ 25°C

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2.9 Power specifications

The drive receives DC power (+5V) through the 4-pin power connector.

2.9.1 Power consumption

Power requiremen ts for the dr i ves are lis ted in the ta bl e on p age 7 . Typical power measurements are based 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 2: DC power

Power di s s ipation +5V average (25° C)

Spinup (typical) 1.0 Amp
Seek, random r/w, desktop usage 2.3 Watts
Idle* 2.0 Watts
Standby and sleep modes <0.5 watts

*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.