Product Manual
Barracuda
ST31000524AS
ST3750525AS
ST3500413AS
ST3320413AS
ST3250312AS
ST3160316AS
100636864
Rev. B
March 2011
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Contents
Seagate Technology Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.1 About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Drive Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Specification summary tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Start/stop times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power consumption. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Acoustics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.10.1 Test for Prominent Discrete Tones (PDTs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electromagnetic immunity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Agency certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Environmental protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Configuring and Mounting the Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Handling and static-discharge precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Serial ATA (SATA) Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Hot-Plug compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Serial ATA device plug connector pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Supported ATA commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.3
Identify Device command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Barracuda SATA Product Manual, Rev. B
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Barracuda SATA Product Manual, Rev. B
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Figures
Figure 3
Attaching SATA cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Mounting dimensions (1000 and 750GB models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Mounting dimensions (500, 320, 250 and 160GB models) . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Barracuda SATA Product Manual, Rev. B
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Barracuda SATA Product Manual, Rev. B
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Seagate Technology Support Services
For information regarding online support and services, visit http://www.seagate.com/www/en-us/about/
contact_us/
Available services include:
• Presales & Technical support
• Global Support Services telephone numbers & business hours
• Authorized Service Centers
For information regarding Warranty Support, visit
http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance
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1.0 Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate
Barracuda® model drives:
ST31000524AS
ST3750525AS
ST3500413AS
ST3320413AS
ST3250312AS
ST3160316AS
These drives provide the following key features:
• 7200 RPM spindle speed.
• High instantaneous (burst) data-transfer rates (up to 600MB 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.
1.1 About 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.
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.
Note
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Introduction
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 contents of the traditional device registers,
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
10
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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 the following
drive models:
ST31000524AS
ST3750525AS
ST3500413AS
ST3320413AS
ST3250312AS
ST3160316AS
2.1 Specification summary tables
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.
Table 1 Drive specifications summary for 1000 and 750 models
Drive Specification
ST31000524AS
ST3750525AS
Formatted capacity (512 bytes/sector)*
Guaranteed sectors
1000GB
1,953,525,168
4
750GB
1,465,149,168
3
Heads
Disks
2
2
Bytes per sector
512
512
Default sectors per track
Default read/write heads
Default cylinders
63
63
16
16
16,383
16,383
1413kb/in
236 ktracks/in
329Gb/in2
7200 RPM
1695Mb/s
125MB/s
600MB/s
Recording density (max)
Track density (avg)
1413kb/in
236 ktracks/in
329Gb/in2
7200 RPM
1695Mb/s
125MB/s
600MB/s
Areal density (avg)
Spindle speed
Internal data transfer rate (max)
Sustained data transfer rate OD (max)
I/O data-transfer rate (max)
ATA data-transfer modes supported
PIO modes: 0 to 4
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
Cache buffer
32MB
32MB
Height (max.)
26.1mm / 1.028 in
101.6mm /4.0 in (+ 0.010 in)
146.99mm / 5.787 in
622g /1.371 lb
4.16ms
26.1mm / 1.028 in
Width (max.)
101.6mm /4.0 in (+ 0.010 in)
Length (max.)
146.99mm / 5.787 in
622g /1.371 lb
4.16ms
Weight (typical)
Average latency
Power-on to ready (max.)
Standby to ready (max.)
Track-to-track seek time (typical)
<10.0s
<10.0s
<10.0s
<10.0s
<1.0ms read
<1.2ms write
<1.0ms read
<1.2ms write
Average seek, read (typical)
Average seek, write (typical)
<8.5ms typical
<9.5ms typical
<8.5ms typical
<9.5ms typical
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Drive Specifications
Table 1 Drive specifications summary for 1000 and 750 models (continued)
Drive Specification
ST31000524AS
ST3750525AS
Startup current (typical) 12V (peak)
Voltage tolerance (including noise)
2.0A
2.0A
5V +10% / -7.5%
12V +10% / -7.5%
5V +10% / -7.5%
12V +10% / -7.5%
Ambient temperature
Temperature gradient
Relative humidity
0° to 60°C (operating)
–40° to 70°C (non-operating)
0° to 60°C (operating)
–40° to 70°C (non-operating)
20°C per hour max (operating)
30°C per hour max (non-operating)
20°C per hour max (operating)
30°C per hour max (non-operating)
5% to 95% (operating)
5% to 95% (non-operating)
5% to 95% (operating)
5% to 95% (non-operating)
Relative humidity gradient (max.)
Wet bulb temperature (max.)
30% per hour
30% per hour
37.7°C max (operating)
40.0°C max (non-operating)
37.7°C max (operating)
40.0°C max (non-operating)
Altitude, operating
–304.8m to 3,048m
(–1000 ft to 10,000+ ft)
–304.8m to 3,048m
(–1000 ft to 10,000+ ft)
Altitude, non-operating
(below mean sea level, max)
–304.8m to 12,192m
(–1000 ft to 40,000+ ft)
–304.8m to 12,192m
(–1000 ft to 40,000+ ft)
Operational Shock (max)
Non-Operational Shock (max)
Vibration, operating
70 Gs at 2ms
300 Gs at 2ms
70 Gs at 2ms
300 Gs at 2ms
2Hz to 22Hz: 0.25 Gs, Limited displace-
ment
2Hz to 22Hz: 0.25 Gs, Limited displacement
22Hz to 350Hz: 0.50 Gs
22Hz to 350Hz: 0.50 Gs
350Hz to 500Hz: 0.25 Gs
350Hz to 500Hz: 0.25 Gs
Vibration, non-operating
5Hz to 22Hz: 3.0 Gs
22Hz to 350Hz: 3.0 Gs
350Hz to 500Hz: 3.0 Gs
5Hz to 22Hz: 3.0 Gs
22Hz to 350Hz: 3.0 Gs
350Hz to 500Hz: 3.0 Gs
Drive acoustics, sound power
Idle**
2.6 bels (typical)
2.7 bels (max)
2.6 bels (typical)
2.7 bels (max)
Seek
2.8 bels (typical)
3.0 bels (max)
2.8 bels (typical)
3.0 bels (max)
Non-recoverable read errors
Annulized Failure Rate (AFR)
Warranty
1 per 1014 bits read
1 per 1014 bits read
0.34%
0.34%
To determine the warranty for a specific drive, use a web browser to access the following web
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 dis-
play the warranty information for your drive.
Contact start-stop cycles
50,000 at 25°C, 50% rel. humidity
Yes
50,000 at 25°C, 50% rel. humidity
Yes
Supports Hotplug operation per the
Serial ATA Revision 2.5 specification
*One GB 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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power
to operational levels.
Table 2 Drive specifications summary for 500GB and 320 models
Drive Specification
Formatted capacity (512 bytes/sector)*
Guaranteed sectors
Heads
ST3500413AS
ST3320413AS
500GB
320GB
976,773,168
625,142,448
2
2
Disks
1
1
Bytes per sector
512
63
512
63
Default sectors per track
Default read/write heads
Default cylinders
16
16
16,383
16,383
12
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Table 2 Drive specifications summary for 500GB and 320 models (continued)
Drive Specification
ST3500413AS
1413kb/in
ST3320413AS
1413kb/in
Recording density (max.)
Track density (avg.)
236 ktracks/in
329Gb/in2
7200 RPM
1695Mb/s
236 ktracks/in
329Gb/in2
Areal density (avg.)
Spindle speed
7200 RPM
Internal data transfer rate (max)
Sustained data transfer rate OD (max)
I/O data-transfer rate (max.)
ATA data-transfer modes supported
1695Mb/s
125MB/s
125MB/s
600MB/s
600MB/s
PIO modes: 0 to 4
PIO modes: 0 to 4
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
Cache buffer
16MB
16MB
Height (max)
19.98mm / 0.787 in
101.6mm / 4.0 in (+ 0.010 in)
146.99mm / 5.787 in
415g / 0.915 lb
4.16ms
19.98mm / 0.787 in
101.6mm / 4.0 in (+ 0.010 in)
146.99mm / 5.787 in
415g / 0.915 lb
4.16ms
Width (max)
Length (max)
Weight (typical)
Average latency
Power-on to ready (max)
Standby to ready (max)
Track-to-track seek time (typical)
<8.5s
<8.5s
<8.5s
<8.5s
<1.0ms read;
<1.2ms write
<1.0ms read;
<1.2ms write
Average seek, read (typical)
<8.5ms
<9.5ms
2.0A
<8.5ms
<9.5ms
2.0A
Average seek, write (typical)
Startup current (typical) 12V (peak)
Voltage tolerance (including noise)
5V +10% / -7.5%
12V +10% / -7.5%
5V +10% / -7.5%
12V +10% / -7.5%
Ambient temperature
Temperature gradient
Relative humidity
0° to 60°C (operating)
–40° to 70°C (non-operating)
0° to 60°C (operating)
–40° to 70°C (non-operating)
20°C per hour max (operating)
30°C per hour max (non-operating)
20°C per hour max (operating)
30°C per hour max (non-operating)
5% to 95% (operating)
5% to 95% (non-operating)
5% to 95% (operating)
5% to 95% (non-operating)
Relative humidity gradient (max)
Wet bulb temperature (max)
30% per hour
30% per hour
37.7°C (operating)
40.0°C (non-operating)
37.7°C (operating)
40.0°C (non-operating)
Altitude, operating
–304.8m to 3,048m
(–1000 ft to 10,000+ ft)
–304.8m to 3,048m
(–1000 ft to 10,000+ ft)
Altitude, non-operating
(below mean sea level, max)
–304.8m to 12,192m
(–1000 ft to 40,000+ ft)
–304.8m to 12,192m
(–1000 ft to 40,000+ ft)
Operational Shock (max)
Non-Operational Shock (max)
Vibration, operating
70 Gs at 2ms
350 Gs at 2ms
70 Gs at 2ms
350 Gs at 2ms
2Hz to 22Hz: 0.25 Gs, Limited displacement
22Hz to 350Hz: 0.50 Gs
2Hz to 22Hz: 0.25 Gs, Limited displacement
22Hz to 350Hz: 0.50 Gs
350Hz to 500Hz: 0.25 Gs
350Hz to 500Hz: 0.25 Gs
Vibration, non-operating
5Hz to 22Hz: 3.0 Gs
22Hz to 350Hz: 3.0 Gs
350Hz to 500Hz: 3.0 Gs
5Hz to 22Hz: 3.0 Gs
22Hz to 350Hz: 3.0 Gs
350Hz to 500Hz: 3.0 Gs
Drive acoustics, sound power
Idle**
2.6 bels (typical)
2.7 bels (max)
2.6 bels (typical)
2.7 bels (max)
Seek
2.8 bels (typical)
3.0 bels (max)
2.8 bels (typical)
3.0 bels (max)
Non-recoverable read errors
Annulized Failure Rate (AFR)
1 per 1014 bits read
1 per 1014 bits read
0.34%
0.34%
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Drive Specifications
Table 2 Drive specifications summary for 500GB and 320 models (continued)
Drive Specification
ST3500413AS
ST3320413AS
Warranty
To determine the warranty for a specific drive, use a web browser to access the following web
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 dis-
play the warranty information for your drive.
Contact start-stop cycles
50,000 at 25°C, 50% rel. humidity
Yes
50,000 at 25°C, 50% rel. humidity
Yes
Supports Hotplug operation per the
Serial ATA Revision 2.5 specification
*One GB 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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power
to operational levels.
Table 3 Drive specifications summary for 250GB and 160GB models
Drive Specification
Formatted capacity (512 bytes/sector)*
Guaranteed sectors
ST3250312AS
250GB
ST3160316AS
160GB
488,397,168
1
312,581,808
1
Heads
Disks
1
1
Bytes per sector
512
512
Default sectors per track
Default read/write heads
Default cylinders
63
63
16
16
16,383
16,383
Recording density (max.)
Track density (avg.)
1413kb/in
236 ktracks/in
329Gb/in2
7200 RPM
1695Mb/s
125MB/s
600MB/s
1413kb/in
236 ktracks/in
329Gb/in2
7200 RPM
1695Mb/s
125MB/s
600MB/s
Areal density (avg.)
Spindle speed
Internal data transfer rate (max.)
Sustained data transfer rate OD (max.)
I/O data-transfer rate
ATA data-transfer modes supported
PIO modes: 0 to 4
PIO modes: 0 to 4
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
Multiword DMA modes: 0 to 2
Ultra DMA modes: 0 to 6
Cache buffer
8MB
8MB
Height (max.)
19.98mm / 0.787 in
101.6mm / 4.0 in ( + 0.010 in)
146.99mm / 5.787 in
415g / 0.915 lb
4.16ms
19.98mm / 0.787 in
101.6mm / 4.0 in ( + 0.010 in)
146.99mm / 5.787 in
415g / 0.915 lb
4.16ms
Width (max.)
Length (max.)
Weight (typical)
Average latency
Power-on to ready (max.)
Standby to ready (max.)
Track-to-track seek time (typical)
<8.5s
<8.5s
<8.5s
<8.5s
<1.0ms (read)
<1.2ms (write)
<1.0ms (read)
<1.2ms (write)
Average seek, read (typical)
Average seek, write (typical)
<8.5ms (read)
<9.5ms (write)
<8.5ms (read)
<9.5ms (write)
Startup current (typical) 12V (peak)
Voltage tolerance (including noise)
2.0A
2.0A
5V +10% / -7.5%
12V +10% / -7.5%
5V +10% / -7.5%
12V +10% / -7.5%
Ambient temperature
0° to 60°C (operating)
–40° to 70°C (non-operating)
0° to 60°C (operating)
–40° to 70°C (non-operating)
Temperature gradient (max.)
20°C per hour (operating)
30°C per hour (non-operating)
20°C per hour (operating)
30°C per hour (non-operating)
14
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Drive Specifications
Table 3 Drive specifications summary for 250GB and 160GB models (continued)
Drive Specification
ST3250312AS
ST3160316AS
Relative humidity
5% to 95% (operating)
5% to 95% (non-operating)
5% to 95% (operating)
5% to 95% (non-operating)
Relative humidity gradient (max.)
Wet bulb temperature
30% per hour
30% per hour
37.7°C max (operating)
40.0°C max (non-operating)
37.7°C max (operating)
40.0°C max (non-operating)
Altitude, operating
–60.96m to 3,048m
(–1000 ft to 10,000+ ft)
–60.96m to 3,048m
(–1000 ft to 10,000+ ft)
Altitude, non-operating
(below mean sea level, max.)
–60.96m to 12,192m
(–1000 ft to 40,000+ ft)
–60.96m to 12,192m
(–1000 ft to 40,000+ ft)
Operational Shock (max.)
Non-Operational Shock (max.)
Vibration, operating
70 Gs at 2ms
350 Gs at 2ms
70 Gs at 2ms
350 Gs at 2ms
2Hz to 22Hz: 0.25 Gs, Limited displacement
22Hz to 350Hz: 0.50 Gs
2Hz to 22Hz: 0.25 Gs, Limited displacement
22Hz to 350Hz: 0.50 Gs
350Hz to 500Hz: 0.25 Gs
350Hz to 500Hz: 0.25 Gs
Vibration, non-operating
5Hz to 22Hz: 3.0 Gs
22Hz to 350Hz: 3.0 Gs
350Hz to 500Hz: 3.0 Gs
5Hz to 22Hz: 3.0 Gs
22Hz to 350Hz: 3.0 Gs
350Hz to 500Hz: 3.0 Gs
Drive acoustics, sound power
Idle**
2.6 bels (typical)
2.7 bels (max)
2.6 bels (typical)
2.7 bels (max)
Seek
2.8 bels (typical)
3.0 bels (max)
2.8 bels (typical)
3.0 bels (max)
Non-recoverable read errors
Annulized Failure Rate (AFR)
Warranty
1 per 1014 bits read
1 per 1014 bits read
0.34%
0.34%
To determine the warranty for a specific drive, use a web browser to access the following web
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 dis-
play the warranty information for your drive.
Contact start-stop cycles
50,000 at 25°C, 50% rel. humidity
Yes
50,000 at 25°C, 50% rel. humidity
Yes
Supports Hotplug operation per the
Serial ATA Revision 2.5 specification
*One GB 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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power
to operational levels.
2.2 Formatted capacity
Formatted
capacity*
Guaranteed
sectors
Model
Bytes per sector
ST31000524AS
ST3750525AS
ST3500413AS
ST3320413AS
ST3250312AS
ST3160316AS
1000GB
750GB
500GB
320GB
250GB
160GB
1,953,525,168
1,465,149,168
976,773,168
625,142,448
488,397,168
312,581,808
512
*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and
formatting.
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Drive Specifications
2.2.1 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.
See Section 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-bit
addressing support of drives with capacities over 137GB.
2.3 Default logical 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.
16
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Drive Specifications
2.4 Recording and interface technology
Interface
Serial ATA (SATA)
Recording method
Perpendicular
1413
Recording density (kbits/inch max)
Track density (ktracks/inch avg)
236
2
Areal density (Gbits/inch avg)
329
Spindle speed (RPM)
7,200 0.2%
1695
Internal data transfer rate (Mb/s max)
Sustained data transfer rate (MB/s max) 125
I/O data-transfer rate (MB/s max)
600
2.5 Physical characteristics
Maximum height
1000 and 750GB models
500, 320, 250 and 160GB models
Maximum width
26.1mm / 1.028 in
19.98mm / 0.787 in
101.6mm / 4.000 (+ 0.010 in)
146.99mm / 5.787 in
Maximum length
Typical weight
1000 and 750GB models
500, 320, 250 and 160GB models
Cache buffer
622g / 1.371 lb
415g / 0.915 lb
1000 and 750GB models
500 and 320GB models
250 and 160GB models
32MB (32,768kb)
16MB (16,384kb)
8MB (8192kb)
2.6 Seek time
Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using
drive diagnostics. The specifications in the table 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.
Typical seek times (ms)
Track-to-track
Read
1.0
Write
1.2
Average
8.5
9.5
Average latency
4.16
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Drive Specifications
These drives are designed to consistently meet the seek times represented in this manual.
Physical seeks, regardless of mode (such as track-to-track and average), are expected to meet
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.
Note
2.7 Start/stop times
1000 and 750GB models
500, 320, 250 and 160GB models
Power-on to Ready (typ / max sec)
Standby to Ready (typ / max sec)
Ready to spindle stop (typ / max sec)
<10.0
<10.0
10
<8.5
<8.5
10
2.8 Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to Figure 1 on page 28
2.8.1 Power consumption
Power requirements for the drives are listed in Table 4 on page 19 and Table 5 on page 19. Typical power
measurements are based on an average of drives tested, under nominal conditions, using 5.0V and 12.0V input
voltage at 25°C ambient temperature.
• Spinup power
Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating
speed.
• Read/write power and current
Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-ms delay,
then a 16-sector read followed by a 32-ms delay.
• Operating power and current
Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each 10
reads) and 20 percent drive idle mode.
• 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 mode.
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Drive Specifications
Table 4 DC power requirements (2-disk)
Power dissipation (2-disk values shown)
Avg (watts 25° C)
Avg 5V typ amps
Avg 12V typ amps
2.0 (peak)
0.337
Spinup
—
—
Idle* †
5.0
0.168
0.153
0.496
0.35
0.35
Idle* † (with offline activity)
Operating
5.40
6.57
0.79
0.79
0.387
0.341
Standby
0.01
Sleep
0.01
Table 5 DC power requirements (1-disk)
Power dissipation (1-disk values shown)
Avg (watts 25° C)
Avg 5V typ amps
Avg 12V typ amps
2.0 (peak)
0.224
Spinup
—
—
Idle* †
4.60
4.50
6.19
0.79
0.79
0.378
0.250
0.656
0.35
0.35
Idle* † (with offline activity)
Operating
0.240
0.243
Standby
0.01
Sleep
0.01
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power
to operational levels.
†5W IDLE with DIPLM Enabled
2.8.2 Conducted noise
Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the
+12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.
• Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave
injected noise at up to 10MHz.
• Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave
injected noise at up to 10MHz.
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write
current.
Note
2.8.3 Voltage tolerance
Voltage tolerance (including noise):
•
5V +10% / -7.5%
• 12V +10% / -7.5%
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Drive Specifications
2.8.4 Power-management modes
The drive provides programmable power management to provide greater energy efficiency. In most systems, you
can control power management through the system setup program. The drive features the following power-
management modes:
Power modes
Active
Heads
Spindle
Rotating
Rotating
Stopped
Stopped
Buffer
Tracking
Tracking
Parked
Parked
Enabled
Enabled
Enabled
Disabled
Idle
Standby
Sleep
• Active mode
The drive is in Active mode during the read/write and seek operations.
• Idle mode
The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disk
access is necessary.
• Standby mode
The drive enters Standby mode when the host sends a Standby Immediate command. If the host has set the
standby timer, the drive can also enter Standby mode automatically after the drive has been inactive for a spec-
ifiable length of time. The standby timer delay is established using a Standby or Idle command. In Standby
mode, the drive buffer is enabled, the heads are parked and the spindle is at rest. The drive accepts all com-
mands and returns to Active mode any time disk access is necessary.
• Sleep mode
The drive enters Sleep mode after receiving a Sleep command from the host. In Sleep mode, the drive buffer is
disabled, the heads are parked and the spindle is at rest. The drive leaves Sleep mode after it receives a Hard
Reset or Soft Reset from the host. After receiving a reset, the drive exits Sleep mode and enters Standby mode
with all current translation parameters intact.
• Idle and Standby timers
Each time the drive performs an Active function (read, write or seek), the standby timer is reinitialized and
begins counting down from its specified delay times to zero. If the standby timer reaches zero before any drive
activity is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the drive
accepts all commands and returns to Active mode when disk access is necessary.
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Drive Specifications
2.9 Environmental specifications
2.9.1 Ambient temperature
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. Actual
drive case temperature should not exceed 69°C (156°F) within the operating ambient conditions.
Operating:
0° to 60°C (32° to 140°F)
Non-operating:
–40° to 70°C (–40° to 158°F)
2.9.2 Temperature gradient
Operating:
20°C per hour (68°F per hour max), without condensation
30°C per hour (86°F per hour max)
Non-operating:
2.9.3 Humidity
2.9.3.1 Relative humidity
Operating:
5% to 95% non-condensing (30% per hour max)
5% to 95% non-condensing (30% per hour max)
Nonoperating:
2.9.3.2 Wet bulb temperature
Operating:
37.7°C (99.9°F max)
Non-operating:
40°C (104°F max)
2.9.4 Altitude
Operating:
–304.8 m to 3,048 m (–1000 ft. to 10,000+ ft.)
–304.8 m to 12,192 m (–1000 ft. to 40,000+ ft.)
Non-operating:
2.9.5 Shock
All shock specifications assume that the drive is mounted securely with the input shock applied at the drive
mounting screws. Shock may be applied in the X, Y or Z axis.
2.9.5.1 Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum
operating shock of 70 Gs based on half-sine shock pulses of 2 ms during read operations. Shocks should not be
repeated more than two times per second.
2.9.5.2 Non-operating shock
1000 and 750GB models
The non-operating shock level that the drive can experience without incurring physical damage or degradation in
performance when subsequently put into operation is 300 Gs based on a non-repetitive half-sine shock pulse of 2
ms duration.
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Drive Specifications
500, 320, 250 and 160GB models
The non-operating shock level that the drive can experience without incurring physical damage or degradation in
performance when subsequently put into operation is 350 Gs based on a non-repetitive half-sine shock pulse of
2-ms duration.
2.9.6 Vibration
All vibration specifications assume that the drive is mounted securely with the input vibration applied at the drive
mounting screws. Vibration may be applied in the X, Y or Z axis.
2.9.6.1 Operating vibration
The maximum vibration levels that the drive may experience while meeting the performance standards specified
in this document are specified below.
2Hz to 22Hz
0.25 Gs (Limited displacement)
22Hz to 350Hz
350Hz to 500Hz
0.50 Gs
0.25 Gs
2.9.6.2 Non-operating vibration
The maximum non-operating vibration levels that the drive may experience without incurring physical damage or
degradation in performance when subsequently put into operation are specified below.
5Hz to 22Hz
3.0 Gs (Limited displacement)
3.0 Gs
22Hz to 350Hz
350Hz to 500Hz 3.0 Gs
2.10 Acoustics
Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All
measurements are consistent with ISO document 7779. Sound power measurements are taken under essentially
free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.
For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is
defined by the following equation:
Note
(Number of seeks per second = 0.4 / (average latency + average access time
Table 6 Fluid Dynamic Bearing (FDB) motor acoustics
Idle*
Seek
All models
2.6 bels (typ)
2.7 bels (max)
2.8 bels (typ)
3.0 bels (max)
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power
to operational levels.
2.10.1 Test for Prominent Discrete Tones (PDTs)
Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this
process is the use of the absolute threshold of hearing. Seagate uses this threshold curve (originated in ISO 389-
7) to discern tone audibility and to compensate for the inaudible components of sound prior to computation of
tone ratios according to Annex D of the ECMA-74 standards.
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Drive Specifications
2.11 Electromagnetic immunity
When properly installed in a representative host system, the drive operates without errors or degradation in
performance when subjected to the radio frequency (RF) environments defined in the following Table 7:
Table 7 Radio frequency environments
Performance
level
Reference
standard
Test
Description
Electrostatic discharge Contact, HCP, VCP: 4 kV; Air: 8 kV
B
A
EN61000-4-2: 95
Radiated RF immunity 80MHz to 1,000MHz, 3 V/m,
80% AM with 1kHz sine
EN61000-4-3: 96
ENV50204: 95
900MHz, 3 V/m, 50% pulse modulation @
200Hz
Electrical fast transient
Surge immunity
1 kV on AC mains, 0.5 kV on external I/O B
EN61000-4-4: 95
EN61000-4-5: 95
1 kV differential, 2 kV common,
AC mains
B
Conducted RF
immunity
150kHz to 80MHz, 3 Vrms, 80% AM with
1kHz sine
A
EN61000-4-6: 97
EN61000-4-11: 94
Voltage dips, interrupts 0% open, 5 seconds
0% short, 5 seconds
C
C
C
B
40%, 0.10 seconds
70%, 0.01 seconds
2.12 Reliability
The product shall achieve an Annualized Failure Rate (AFR) of 0.34% (MTBF of 0.75 million hours) when operated
in an environment of ambient air temperatures of 25°C. Operation at temperatures outside the specifications in
Section 2.9 may increase the product AFR (decrease MTBF). AFR and MTBF are population statistics that are not
relevant to individual units.
AFR and MTBF specifications are based on the following assumptions for desktop personal computer
environments:
• 2400 power-on-hours per year.
• 10,000 average motor start/stop cycles per year.
• Operations at nominal voltages.
• Normal I/O duty cycle for desktop personal computers. Operation at excessive I/O duty cycle may degrade
product reliability.
The desktop personal computer environment of power-on-hours, temperature, and I/O duty cycle affect the product
AFR and MTBF. The AFR and MTBF will be degraded if used in an enterprise application
14
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Contact start-stop cycles
1 per 10 bits read, max
0.34% (nominal power, 25°C ambient temperature)
50,000 cycles
(at nominal voltage and temperature, with 60 cycles per hour and a 50% duty cycle)
Preventive maintenance
None required.
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Drive Specifications
2.13 Warranty
To determine the warranty for a specific drive, use a web browser to access the following 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.
2.14 Agency certification
2.14.1 Safety certification
These products are certified to meet the requirements of UL60950-1, CSA60950-1 and EN60950 and so marked
as to the certify agency.
2.14.2 Electromagnetic compatibility
Hard drives that display the CE mark comply with the European Union (EU) requirements specified in the
Electromagnetic Compatibility Directive (2004/108/EC) as put into place 20 July 2007. Testing is performed to the
levels specified by the product standards for Information Technology Equipment (ITE). Emission levels are defined
by EN 55022, Class B and the immunity levels are defined by EN 55024.
Drives are tested in representative end-user systems. Although CE-marked Seagate drives comply with the
directives when used in the test systems, we cannot guarantee that all systems will comply with the directives.
The drive is designed for operation inside a properly designed enclosure, with properly shielded I/O cable (if
necessary) and terminators on all unused I/O ports. Computer manufacturers and system integrators should
confirm EMC compliance and provide CE marking for their products.
Korean RRL
If these drives have the Korean Communications Commission (KCC) logo, they comply with paragraph 1 of Article
11 of the Electromagnetic Compatibility control Regulation and meet the Electromagnetic Compatibility (EMC)
Framework requirements of the Radio Research Laboratory (RRL) Communications Commission, Republic of
Korea.
These drives have been tested and comply with the Electromagnetic Interference/Electromagnetic Susceptibility
(EMI/EMS) for Class B products. Drives are tested in a representative, end-user system by a Korean-recognized
lab.
• Family name: Barracuda 7200.12
• Certificate number: STX - 720012 (B)
Australian C-Tick (N176)
If these models have the C-Tick marking, they comply with the Australia/New Zealand Standard AS/NZ CISPR22
and meet the Electromagnetic Compatibility (EMC) Framework requirements of the Australian Communication
Authority (ACA).
2.14.3 FCC verification
These drives are intended to be contained solely within a personal computer or similar enclosure (not attached as
an external device). As such, each drive is considered to be a subassembly even when it is individually marketed
to the customer. As a subassembly, no Federal Communications Commission verification or certification of the
device is required.
Seagate has tested this device in enclosures as described above to ensure that the total assembly (enclosure,
disk drive, motherboard, power supply, etc.) does comply with the limits for a Class B computing device, pursuant
to Subpart J, Part 15 of the FCC rules. Operation with non-certified assemblies is likely to result in interference to
radio and television reception.
Radio and television interference. This equipment generates and uses radio frequency energy and if not
installed and used in strict accordance with the manufacturer’s instructions, may cause interference to radio and
television reception.
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Drive Specifications
This equipment is designed to provide reasonable protection against such interference in a residential installation.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause interference to radio or television, which can be determined by turning the equipment on and off, you are
encouraged to try one or more of the following corrective measures:
• Reorient the receiving antenna.
• Move the device to one side or the other of the radio or TV.
• Move the device farther away from the radio or TV.
• Plug the computer into a different outlet so that the receiver and computer are on different branch outlets.
If necessary, you should consult your dealer or an experienced radio/television technician for additional
suggestions. You may find helpful the following booklet prepared by the Federal Communications Commission:
How to Identify and Resolve Radio-Television Interference Problems. This booklet is available from the
Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. Refer to publication
number 004-000-00345-4.
2.15 Environmental protection
Seagate designs its products to meet environmental protection requirements worldwide, including regulations
restricting certain chemical substances.
2.15.1 European Union Restriction of Hazardous Substances (RoHS) Directive
The European Union Restriction of Hazardous Substances (RoHS) Directive, restricts the presence of chemical
substances, including Lead, Cadmium, Mercury, Hexavalent Chromium, PBB and PBDE, in electronic products,
effective July 2006. This drive is manufactured with components and materials that comply with the RoHS
Directive.
中国限制危险物品的指令
2.15.2 China Restriction of Hazardous Substances (RoHS) Directive
This product has an Environmental Protection Use Period (EPUP) of 20 years. The following table
contains information mandated by China's "Marking Requirements for Control of Pollution Caused
by Electronic Information Products" Standard.
"O" indicates the hazardous and toxic substance content of the part (at the homogenous material level) is lower
than the threshold defined by the China RoHS MCV Standard.
“O”
RoHS MCV
表示该部件（于同类物品程度上）所含的危险和有毒物质低于中国
标准所定义的门槛值。
"X" indicates the hazardous and toxic substance content of the part (at the homogenous material level) is over the
threshold defined by the China RoHS MCV Standard.
“X”
RoHS MCV
表示该部件（于同类物品程度上）所含的危险和有毒物质超出中国
标准所定义的门槛值。
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Drive Specifications
2.16 Corrosive environment
Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to light
industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM B845.
However, this accelerated testing cannot duplicate every potential application environment. Users should use
caution exposing any electronic components to uncontrolled chemical pollutants and corrosive chemicals as
electronic drive component reliability can be affected by the installation environment. The silver, copper, nickel
and gold films used in Seagate products are especially sensitive to the presence of sulfide, chloride, and nitrate
contaminants. Sulfur is found to be the most damaging. In addition, electronic components should never be
exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or exposed to an
ambient relative humidity greater than 95%. Materials used in cabinet fabrication, such as vulcanized rubber, that
can outgas corrosive compounds should be minimized or eliminated. The useful life of any electronic equipment
may be extended by replacing materials near circuitry with sulfide-free alternatives.
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3.0 Configuring and Mounting the Drive
This section contains the specifications and instructions for configuring and mounting the drive.
3.1 Handling and static-discharge precautions
After unpacking, and before installation, the drive may be exposed to potential handling and electrostatic
discharge (ESD) hazards. Observe the following standard handling and static-discharge precautions:
Caution
• Before handling the drive, put on a grounded wrist strap, or ground yourself frequently by touching the metal chassis
of a computer that is plugged into a grounded outlet. Wear a grounded wrist strap throughout the entire installation
procedure.
• Handle the drive by its edges or frame only.
• The drive is extremely fragile—handle it with care. Do not press down on the drive top cover.
• Always rest the drive on a padded, antistatic surface until you mount it in the computer.
• Do not touch the connector pins or the printed circuit board.
• Do not remove the factory-installed labels from the drive or cover them with additional labels. Removal voids the
warranty. Some factory-installed labels contain information needed to service the drive. Other labels are used to
seal out dirt and contamination.
3.2 Configuring the drive
Each drive on the Serial ATA interface connects point-to-point with the Serial ATA host adapter. There is no
master/slave relationship because each drive is considered a master in a point-to-point relationship. 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. Both drives behave as if they are Device 0 (master) devices.
Serial ATA drives are designed for easy installation. It is usually not necessary to set any jumpers on the drive for
proper operation; however, if you connect the drive and receive a “drive not detected” error, your SATA-equipped
motherboard or host adapter may use a chipset that does not support SATA speed autonegotiation.
3.3 Serial ATA cables and connectors
The Serial ATA interface cable consists of four conductors in two differential pairs, plus three ground connections.
The cable size may be 30 to 26 AWG with a maximum length of one meter (39.37 inches). See Table 8 for
connector pin definitions. Either end of the SATA signal cable can be attached to the drive or host.
For direct backplane connection, the drive connectors are inserted directly into the host receptacle. The drive and
the host receptacle incorporate features that enable the direct connection to be hot pluggable and blind
mateable.
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Configuring and Mounting the Drive
Figure 1 Attaching SATA cabling
Signal connector
Power connector
Signal cable
Power cable
Each cable is keyed to ensure correct orientation. Barracuda drives support latching SATA connectors.
3.4 Drive mounting
You can mount the drive in any orientation using four screws in the side-mounting holes or four screws in the
bottom-mounting holes. See Figure 2 and Figure 3 for drive mounting dimensions. Follow these important
mounting precautions when mounting the drive:
• Allow a minimum clearance of 0.030 inches (0.76mm) around the entire perimeter of the drive for cooling.
• Use only 6-32 UNC mounting screws.
• The screws should be inserted no more than 0.150 inch (3.81mm) into the bottom or side mounting holes.
• Do not overtighten the mounting screws (maximum torque: 6 inch-lb).
28
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Configuring and Mounting the Drive
Figure 2 Mounting dimensions (1000 and 750GB models)
Recommended
case temperature
measurement location
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4.0 Serial ATA (SATA) Interface
These drives use the industry-standard Serial ATA interface that supports FIS data transfers. It supports ATA
programmed input/output (PIO) modes 0 to 4; multiword DMA modes 0 to 2, and Ultra DMA modes 0 to 6.
For detailed information about the Serial ATA interface, refer to the “Serial ATA: High Speed Serialized AT
Attachment” specification.
4.1 Hot-Plug compatibility
Barracuda drives incorporate connectors which enable you to hot plug these drives in accordance with the Serial
4.2 Serial ATA device plug connector pin definitions
Table 8 summarizes the signals on the Serial ATA interface and power connectors.
Table 8 Serial ATA connector pin definitions
Segment Pin
Function
Ground
A+
Definition
S1
S2
S3
S4
S5
S6
2nd mate
Differential signal pair A from Phy
A-
Ground
B-
2nd mate
Differential signal pair B from Phy
B+
S7
Ground
2nd mate
Signal
Key and spacing separate signal and power segments
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Serial ATA (SATA) Interface
Table 8 Serial ATA connector pin definitions
Segment Pin
Function
V33
Definition
P1
P2
P3
P4
P5
P6
P7
3.3V power
V33
3.3V power
V33
3.3V power, pre-charge, 2nd mate
1st mate
Ground
Ground
Ground
V5
2nd mate
2nd mate
5V power, pre-charge, 2nd mate
5V power
P8
V5
Power
P9
V5
5V power
P10
P11
P12
P13
P14
P15
Ground
2nd mate
Ground or LED signal If grounded, drive does not use deferred spin
Ground
V12
1st mate.
12V power, pre-charge, 2nd mate
12V power
V12
V12
12V power
Notes
1. All pins are in a single row, with a 1.27 mm (0.050”) pitch.
2. The comments on the mating sequence apply to the case of backplane blindmate connector only. In this
case, the mating sequences are:
• the ground pins P4 and P12.
• the pre-charge power pins and the other ground pins.
• the signal pins and the rest of the power pins.
3. There are three power pins for each voltage. One pin from each voltage is used for pre-charge when installed
in a blind-mate backplane configuration.
• All used voltage pins (Vx) must be terminated.
4.3 Supported ATA commands
The following table lists Serial ATA standard commands that the drive supports.
For a detailed description of the ATA commands, refer to the Serial ATA International Organization:
Serial ATA Revision 2.6 (http://www.sata-io.org).
See “S.M.A.R.T. commands” on page 40 for details and subcommands used in the S.M.A.R.T. implementation.
Command name
Command code (in hex)
E5
Check Power Mode
H
Device Configuration Freeze Lock
Device Configuration Identify
Device Configuration Restore
Device Configuration Set
B1 / C1
H
H
H
H
H
B1 / C2
H
B1 / C0
H
B1 / C3
H
32
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Serial ATA (SATA) Interface
Command name
Device Reset
Command code (in hex)
08
92
90
H
H
H
Download Microcode
Execute Device Diagnostics
Flush Cache
E7
H
Flush Cache Extended
Format Track
EA
H
50
H
Identify Device
EC
H
Idle
E3
E1
H
Idle Immediate
H
H
Initialize Device Parameters
Read Buffer
91
E4
H
Read DMA
C8
H
H
H
Read DMA Extended
Read DMA Without Retries
Read Log Ext
25
H
C9
2F
H
Read Multiple
C4
Read Multiple Extended
Read Native Max Address
Read Native Max Address Extended
Read Sectors
29
F8
27
20
24
21
40
42
41
10
F6
F3
F4
F5
F1
F2
70
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
Read Sectors Extended
Read Sectors Without Retries
Read Verify Sectors
Read Verify Sectors Extended
Read Verify Sectors Without Retries
Recalibrate
Security Disable Password
Security Erase Prepare
Security Erase Unit
Security Freeze
Security Set Password
Security Unlock
Seek
Set Features
EF
H
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Serial ATA (SATA) Interface
Command name
Command code (in hex)
F9
Set Max Address
H
Note: Individual Set Max Address
commands are identified by the
value placed in the Set Max
Features register as defined to the
right.
Address:
Password:
Lock:
00
01
02
03
04
H
H
H
H
H
Unlock:
Freeze Lock:
Set Max Address Extended
Set Multiple Mode
37
H
C6
H
H
Sleep
E6
S.M.A.R.T. Disable Operations
S.M.A.R.T. Enable/Disable Autosave
S.M.A.R.T. Enable Operations
S.M.A.R.T. Execute Offline
S.M.A.R.T. Read Attribute Thresholds
S.M.A.R.T. Read Data
S.M.A.R.T. Read Log Sector
S.M.A.R.T. Return Status
S.M.A.R.T. Save Attribute Values
S.M.A.R.T. Write Log Sector
Standby
B0 / D9
H
H
H
H
H
H
H
H
B0 / D2
H
B0 / D8
H
B0 / D4
H
B0 / D1
H
B0 / D0
H
B0 / D5
H
B0 / DA
H
H
H
H
B0 / D3
H
B0 / D6
H
E2
E0
E8
H
H
H
Standby Immediate
Write Buffer
Write DMA
CA
H
Write DMA Extended
Write DMA FUA Extended
Write DMA Without Retries
Write Log Extended
35
H
3D
H
CB
H
3F
H
Write Multiple
C5
39
H
Write Multiple Extended
Write Multiple FUA Extended
Write Sectors
H
CE
H
30
31
34
45
H
Write Sectors Without Retries
Write Sectors Extended
Write Uncorrectable
H
H
H
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Serial ATA (SATA) Interface
4.3.1 Identify Device command
The Identify Device command (command code EC ) transfers information about the drive to the host following
H
power up. The data is organized as a single 512-byte block of data, whose contents are shown in on page 32. All
reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or vary with the state
of the drive.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
Word
Description
Value
0C5A
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
H
1
Number of logical cylinders
16,383
2
ATA-reserved
0000
16
H
3
Number of logical heads
4
Retired
0000
0000
003F
0000
H
H
H
H
5
Retired
6
Number of logical sectors per logical track: 63
Retired
7–9
10–19
20
Serial number: (20 ASCII characters, 0000 = none)
ASCII
H
Retired
Retired
Obsolete
0000
0400
0000
x.xx
H
H
H
21
22
23–26
Firmware revision
(8 ASCII character string, padded with blanks to end
of string)
27–46
47
Drive model number:
(40 ASCII characters, padded with blanks to end of
string)
(Bits 7–0) Maximum sectors per interrupt on Read
multiple and Write multiple (16)
8010
H
48
49
Reserved
0000
2F00
H
Standard Standby timer, IORDY supported and may
be disabled
H
50
51
52
53
54
55
ATA-reserved
0000
0200
0200
0007
H
H
H
H
PIO data-transfer cycle timing mode
Retired
Words 54–58, 64–70 and 88 are valid
Number of current logical cylinders
Number of current logical heads
xxxx
xxxx
H
H
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Serial ATA (SATA) Interface
Word
56
Description
Value
Number of current logical sectors per logical track
Current capacity in sectors
xxxx
xxxx
H
H
H
57–58
59
Number of sectors transferred during a Read Multiple xxxx
or Write Multiple command
60–61
Total number of user-addressable LBA sectors
available
0FFFFFFFh*
*Note: The maximum value allowed in this field is:
0FFFFFFFh (268,435,455 sectors, 137GB). Drives
with capacities over 137GB will have 0FFFFFFFh in
this field and the actual number of user-addressable
LBAs specified in words 100-103. This is required for
drives that support the 48-bit addressing feature.
62
63
Retired
0000
H
Multiword DMA active and modes supported
(see note following this table)
xx07
H
64
65
66
Advanced PIO modes supported (modes 3 and 4
supported)
0003
0078
0078
H
H
H
Minimum multiword DMA transfer cycle time per
word (120 nsec)
Recommended multiword DMA transfer cycle time
per word
(120 nsec)
67
68
Minimum PIO cycle time without IORDY flow control
(240 nsec)
00F0
H
Minimum PIO cycle time with IORDY flow control (120 0078
nsec)
H
69–74
75
ATA-reserved
0000
001F
H
Queue depth
H
76
Serial ATA capabilities
Reserved for future Serial ATA definition
Serial ATA features supported
Serial ATA features enabled
Major version number
xxxx
xxxx
xxxx
xxxx
H
77
H
H
H
78
79
80
003E
H
81
Minor version number
0028
H
82
Command sets supported
Command sets supported
364B
7C03
H
83
H
84
Command sets support extension
(see note following this table)
4003 See Word 108-111 note.
H
(4003H = 0100000000000011 binary)
85
86
Command sets enabled
Command sets enabled
30xx
H
0001
H
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Serial ATA (SATA) Interface
Word
87
Description
Value
Command sets enable extension
4000
H
H
88
Ultra DMA support and current mode (see note
following this table)
xx3F
89
Security erase time
0000
0000
H
H
90
Enhanced security erase time
Master password revision code
Hardware reset value
ATA-reserved
92
FFFE
H
93
xxxx
H
95–99
100–103
0000
H
Total number of user-addressable LBA sectors
These words are required for drives that support the
48-bit addressing feature. Maximum value:
0000FFFFFFFFFFFFh.
ST31000524AS = 1,953,525,168
ST3750525AS = 1,465,149,168
ST3500413AS = 976,773,168
ST3320413AS = 625,142,448
ST3250312AS = 488,397,168
ST3160316AS = 312,581,808
104–107
108–111
ATA-reserved
0000
H
The mandatory value of the world wide name (WWN)
for the drive. NOTE: This field is valid if word 84, bit 8
is set to 1 indicating 64-bit WWN support.
Each drive will have a unique value.
112–127
128
ATA-reserved
Security status
Seagate-reserved
ATA-reserved
Integrity word
0000
0001
H
H
129–159
160–254
255
xxxx
H
0000
xxA5
H
H
Advanced Power Management (APM) and Automatic Acoustic Management (AAM) features
are not supported.
Note
Note
See the bit descriptions below for words 63, 84, and 88 of the Identify Drive data.
Description (if bit is set to 1)
Bit
0
Word 63
Multiword DMA mode 0 is supported.
Multiword DMA mode 1 is supported.
Multiword DMA mode 2 is supported.
Multiword DMA mode 0 is currently active.
Multiword DMA mode 1 is currently active.
Multiword DMA mode 2 is currently active.
1
2
8
9
10
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Serial ATA (SATA) Interface
Bit
0
Word 84
SMART error login is supported.
1
SMART self-test is supported.
2
Media serial number is supported.
Media Card Pass Through Command feature set is supported.
Streaming feature set is supported.
GPL feature set is supported.
3
4
5
6
WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT commands are supported.
WRITE DMA QUEUED FUA EXT command is supported.
64-bit World Wide Name is supported.
Obsolete.
7
8
9-10
11-12
13
14
15
Bit
0
Reserved for TLC.
IDLE IMMEDIATE command with IUNLOAD feature is supported.
Shall be set to 1.
Shall be cleared to 0.
Word 88
Ultra DMA mode 0 is supported.
Ultra DMA mode 1 is supported.
Ultra DMA mode 2 is supported.
Ultra DMA mode 3 is supported.
Ultra DMA mode 4 is supported.
Ultra DMA mode 5 is supported.
Ultra DMA mode 6 is supported.
Ultra DMA mode 0 is currently active.
Ultra DMA mode 1 is currently active.
Ultra DMA mode 2 is currently active.
Ultra DMA mode 3 is currently active.
Ultra DMA mode 4 is currently active.
Ultra DMA mode 5 is currently active.
Ultra DMA mode 6 is currently active.
1
2
3
4
5
6
8
9
10
11
12
13
14
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Serial ATA (SATA) Interface
4.3.2 Set Features command
This command controls the implementation of various features that the drive supports. When the drive receives
this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an interrupt. If
the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on
default has the read look-ahead and write caching features enabled. The acceptable values for the Features
register are defined as follows:
02
03
Enable write cache (default).
H
Set transfer mode (based on value in Sector Count register).
Sector Count register values:
H
00 Set PIO mode to default (PIO mode 2).
H
01 Set PIO mode to default and disable IORDY (PIO mode 2).
H
08 PIO mode 0
H
09 PIO mode 1
H
0A PIO mode 2
H
0B PIO mode 3
H
0C PIO mode 4 (default)
H
20 Multiword DMA mode 0
H
21 Multiword DMA mode 1
H
22 Multiword DMA mode 2
H
40 Ultra DMA mode 0
H
41 Ultra DMA mode 1
H
42 Ultra DMA mode 2
H
43 Ultra DMA mode 3
H
44 Ultra DMA mode 4
H
45 Ultra DMA mode 5
H
46 Ultra DMA mode 6
H
10
55
82
90
Enable use of SATA features
H
H
H
H
Disable read look-ahead (read cache) feature.
Disable write cache
Disable use of SATA features
AA
Enable read look-ahead (read cache) feature (default).
Report full capacity available
H
F1
H
At power-on, or after a hardware or software reset, the default values of the features are as
indicated above.
Note
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Serial ATA (SATA) Interface
4.3.3 S.M.A.R.T. commands
S.M.A.R.T. provides near-term failure prediction for disk drives. When S.M.A.R.T. is enabled, the drive monitors
predetermined drive attributes that are susceptible to degradation over time. If self-monitoring determines that a
failure is likely, S.M.A.R.T. makes a status report available to the host. Not all failures are predictable. S.M.A.R.T.
predictability is limited to the attributes the drive can monitor. For more information on S.M.A.R.T. commands and
implementation, see the Draft ATA-5 Standard.
SeaTools diagnostic software activates a built-in drive self-test (DST S.M.A.R.T. command for D4 ) that eliminates
H
unnecessary drive returns. The diagnostic software ships with all new drives and is also available at:
This drive is shipped with S.M.A.R.T. features disabled. You must have a recent BIOS or software package that
supports S.M.A.R.T. to enable this feature. The table below shows the S.M.A.R.T. command codes that the drive
uses.
Code in features register S.M.A.R.T. command
D0
D2
D3
D4
D5
D6
D8
D9
S.M.A.R.T. Read Data
H
H
H
H
H
H
H
H
S.M.A.R.T. Enable/Disable Attribute Autosave
S.M.A.R.T. Save Attribute Values
S.M.A.R.T. Execute Off-line Immediate (runs DST)
S.M.A.R.T. Read Log Sector
S.M.A.R.T. Write Log Sector
S.M.A.R.T. Enable Operations
S.M.A.R.T. Disable Operations
S.M.A.R.T. Return Status
DA
H
If an appropriate code is not written to the Features Register, the command is aborted and
0x04 (abort) is written to the Error register.
Note
40
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Index
A
E
Electromagnetic Compatibility control Regula-
Electromagnetic
Compatibility
Directive
Australia/New Zealand Standard AS/NZ Electrostatic discharge 23
B
C
F
G
H
D
I
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Q
R
K
L
M
N
O
P
S
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U
V
W
T
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Seagate Technology LLC
AMERICAS
ASIA/PACIFIC
Seagate Technology LLC 920 Disc Drive, Scotts Valley, California 95066, United States, 831-438-6550
Seagate Singapore International Headquarters Pte. Ltd. 7000 Ang Mo Kio Avenue 5, Singapore 569877, 65-6485-3888
EUROPE, MIDDLE EAST AND AFRICA Seagate Technology SAS 16-18 rue du Dôme, 92100 Boulogne-Billancourt, France, 33 1-4186 10 00
Publication Number: 100636864, Rev. B
March 2011
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