in the United States and/or other countries. Barracuda LP Series, SeaTools and SeaTDD are either trade
marks or registered trademarks of Seagate Technology LLC or one of its affil iated companies in the United
States and/or other countries. All other trademarks or registered trademarks are the property of their
respective owners.
When referring to drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte, or TB,
equals one trillion bytes. Your computer's operating system may use a different standard of measurement
and report a lower capacity. In addition, some of the listed capacity is used for formatting and other func
tions, and thus will not be available for data storage. Seagate reserves the right to change, without notice,
product offerings or specifications.
This manual describes the functional, mechanical and interface specifications for the following Seagate
Barracuda
ST32000542ASST31500541ASST31000520AS
These drives provide the following key features:
• 5900 RPM spindle speed.
• High instantaneous (burst) data-transfer rates (up to 300MB per second).
• Perpendicular recording technology provides the drives with increased areal density.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Native Command Queueing with command ordering to increase performance in demanding applications.
• Full-track multiple-sector transfer capability without local processor intervention.
• Quiet operation.
• Compliant with RoHS requirements in China and Europe.
• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Supports latching SATA cables and connectors.
• Worldwide Name (WWN) capability uniquely identifies the drive.
®
LP Series model drives:
Barracuda LP Series SATA Product Manual, Rev. D 1
1.1About the Serial ATA interface
The Serial ATA interface provides several advantages over the traditional (parallel) ATA interface. The primary
advantages include:
• Easy installation and configuration with true plug-and-play connectivity. It is not necessary to set any jumpers or other configuration options.
• Thinner and more flexible cabling for improved enclosure airflow and ease of installation.
• Scalability to higher performance levels.
In addition, Serial ATA makes the transition from parallel ATA easy by providing legacy software support. Serial
ATA was designed to allow you to install a Serial ATA host adapter and Serial ATA disk drive in your current
system and expect all of your existing applications to work as normal.
The Serial ATA interface connects each disk drive in a point-to-point configuration with the Serial ATA host
adapter. There is no master/slave relationship with Serial ATA devices like there is with parallel ATA. If two
drives are attached on one Serial ATA host adapter, the host operating system views the two devices as if they
were both “masters” on two separate ports. This essentially means both drives behave as if they are Device 0
(master) devices.
Note.The host adapter may, optionally, emulate a master/slave environment to host software where two
devices on separate Serial ATA ports are represented to host software as a Device 0 (master) and
Device 1 (slave) accessed at the same set of host bus addresses. A host adapter that emulates a
master/slave environment manages two sets of shadow registers. This is not a typical Serial ATA
environment.
The Serial ATA host adapter and drive share the function of emulating parallel ATA device behavior to provide
backward compatibility with existing host systems and software. The Command and Control Block registers,
PIO and DMA data transfers, resets, and interrupts are all emulated.
The Serial ATA host adapter contains a set of registers that shadow the content s of the traditio nal device regi sters, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For additional information about how Serial ATA emulates parallel ATA, refer to the “Serial ATA International
Organization: Serial ATA Revision 2.6”. The specification can be downloaded from www.sata-io.org.
2Barracuda LP Series SATA Product Manual, Rev. D
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 the
following drive models:
The specifications listed in the following tables are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual.
Barracuda LP Series SATA Product Manual, Rev. D 3
Table 1: Drive specifications summary for 2000 and 1500GB models
Drive specificationST32000542ASST31500541AS
Formatted capacity
(512 bytes/sector)*
Guaranteed sectors3,907,029,1682,930,277,168
Heads8
Disk4
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density (max.)1417kb/in
Track density (avg.)236 ktracks/in
Areal density (avg.)341.5 Gbits/in
Spindle speed5900 RPM
Internal data transfer rate (max.)1285Mb/s
Sustained data transfer rate OD (max.)95MB/s
I/O data-transfer rate (max.)300MB/s
ATA data-transfer modes supportedPIO modes: 0 to 4
Cache buffer32MB
Height (max)26.1mm / 1.028 in
Width (max)101.85mm / 4.010 in
Length (max)146.99mm / 5.787 in
Weight (typical)655g / 1.444 lb
Average latency5.1ms
Power-on to ready (typical)<13s
Standby to ready (typical)
Track-to-track seek time (typical)<1.0ms (read)
Average read (typical)
Average write (typical)
Startup current (typical) 12V (peak)2.0A
Voltage tolerance (including noise)5V ± 5%
Operating temperature
(Drive Case temperature)
Nonoperating temperature (Ambient)–40° to 70°C
Temperature gradient (max)20°C per hour max (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient (max.)30% per hour
Wet bulb temperature (max.)37.7°C (operating)
Altitude, operating–60.96m to 3,048m
Altitude, nonoperating
(below mean sea level, max)
2000GB1500GB
2
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
<12s
<1.2ms (write)
<16.0ms
<16.0ms
12V ± 10%
0° to 60°C
30°C per hour max (nonoperating)
5% to 95% (nonoperating)
40.0°C (nonoperating)
(–200 ft to 10,000+ ft)
–60.96m to 12,192m
(–200 ft to 40,000+ ft)
4Barracuda LP Series SATA Product Manual, Rev. D
Drive specificationST32000542ASST31500541AS
Operational Shock (max)70 Gs at 2ms
Non-Operational Shock (max)300 Gs at 2ms
Vibration, operating5 to 350 Hz: 0.50 Gs
Vibration, nonoperating5 to 350 Hz: 5.0 Gs
Drive acoustics, sound power
Idle**2.5 bels (typical)
Seek Profile2.6 bels (typical)
Nonrecoverable read errors1 per 10
WarrantyTo determine the warranty for a specific drive, use a web browser to access the following
Contact start-stop cycles50,000 at 25°C, 50% rel. humidity
Supports Hotplug operation per the
Serial ATA Revision 2.6 specification
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**During periods of drive idle, some offline a ctivity may occur according to the S.M.A.R.T. specification, which may incr ease acoustic and
power to operational levels.
350 to 500 Hz: 0.25 Gs
350 to 500 Hz: 2.0 Gs
2.6 bels (max)
2.8 bels (max)
14
bits read
web page:
From this page, click on the “Verify Your 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.
Table 2: Drive specifications summary for 1000GB models
Drive specificationST31000520AS
Formatted capacity
(512 bytes/sector)*
Guaranteed sectors1,953,525,168
Heads4
Disks2
Bytes per sector512
Default sectors per track63
Default read/write heads16
Default cylinders16,383
Recording density (max)1417kbits/in
Track density (avg)236 ktracks/in avg
Areal density (avg)341.5Gb/in2 avg
Spindle speed5900 RPM
Internal data transfer rate (max)1285Mb/s
Sustained data transfer rate OD (max)95MB/s
I/O data-transfer rate (max)300MB/s
ATA data-transfer modes supportedPIO modes: 0 to 4
Cache buffer32MB
Height (max)26.1mm / 1.028 in
Width (max)101.85mm / 4.010 in
Length (max)146.99mm / 5.787 in
Weight (typical)622g / 1.371 lb
Average latency5.1ms
Power-on to ready (typical)<12s
Standby to ready (typical)<6s
Track-to-track seek time<1.0ms (read)
Average read (typical)
Average write (typical)
Startup current (typical) 12V (peak)2.0A
Voltage tolerance (including noise)5V ± 5%
Operating temperature
(Drive Case temperature)
Nonoperating temperature (Ambient)–40° to 70°C
Temperature gradient (max)20°C per hour (operating)
Relative humidity5% to 90% (operating)
Relative humidity gradient (max)30% per hour
Wet bulb temperature (max)37.7°C max (operating)
Altitude, operating–60.96m to 3,048m
Altitude, nonoperating
(below mean sea level, max)
Operational Shock (max)70 Gs at 2ms
1000GB
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
<1.2ms (write)
<16.0ms
<16.0ms
12V ± 10%
0° to 60°C
30°C per hour (nonoperating)
5% to 95% (nonoperating)
40.0°C max (nonoperating)
(–200 ft to 10,000+ ft)
–60.96m to 12,192m
(–200 ft. to 40,000+ ft.)
6Barracuda LP Series SATA Product Manual, Rev. D
Drive specificationST31000520AS
Non-Operational Shock (max.)350 Gs at 2ms
Vibration, operating5 to 350 Hz: 0.50 Gs
Vibration, nonoperating5 to 350 Hz: 5.0 Gs
Drive acoustics, sound power
Idle**1.9 bels (typical)
Seek Profile2.0 bels (typical)
Nonrecoverable read errors1 per 10
WarrantyTo determine the warranty for a specific drive, use a web browser to access the following
Contact start-stop cycles50,000 at 25°C, 50% rel. humidity
Supports Hotplug operation per the
Serial ATA Revision 2.6 specification
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
**During periods of drive idle, some offline a ctivity may occur according to the S.M.A.R.T. specification, which may incr ease acoustic and
power to operational levels.
350 to 500 Hz: 0.25 Gs
350 to 500 Hz: 2.0 Gs
2.1 bels (max)
2.2 bels (max)
14
bits read
web page:
From this page, click on the “Verify Your 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.