Product Manual
DB35.3 Series Serial ATA
ST3750640SCE
ST3750840SCE
ST3500830SCE
ST3400820SCE
ST3320820SCE
ST3300820SCE
ST3250820SCE
100427570
Rev. D
August 2007
Contents
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specification summary tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.0
Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
DB35.3 Series Serial ATA Product Manual, Rev. D
i
ii
DB35.3 Series Serial ATA Product Manual, Rev. D
List of Figures
Figure 5.
Typical 5V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Typical 12V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
DB35.3 Series Serial ATA Product Manual, Rev. D
iii
1.0
Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate
DB35.3 Series Serial ATA model drives:
ST3750640SCE
ST3750840SCE
ST3500830SCE
ST3400820SCE
ST3320820SCE
ST3300820SCE
ST3250820SCE
These drives provide the following key features:
• 7,200 RPM spindle speed.
• High instantaneous (burst) data-transfer rates (up to 150 Mbytes per second).
• Tunneling Magnetoresistive (TMR) recording heads.
• 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.
• 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.
DB35.3 Series Serial ATA Product Manual, Rev. D
1
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 jump-
ers 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 disc drive in your current
system and expect all of your existing applications to work as normal.
The Serial ATA interface connects each disc 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 contents of the traditional device regis-
ters, referred to as the Shadow Register Block. All Serial ATA devices behave like Device 0 devices. For addi-
tional information about how Serial ATA emulates parallel ATA, refer to the “Serial ATA: High Speed Serialized
2
DB35.3 Series Serial ATA Product Manual, Rev. D
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:
ST3750640SCE
ST3750840SCE
ST3500830SCE
ST3400820SCE
ST3320820SCE
ST3300820SCE
ST3250820SCE
2.1
Specification summary tables
The specifications listed in the following table are for quick reference. For details on specification measurement
or definition, see the appropriate section of this manual.
DB35.3 Series Serial ATA Product Manual, Rev. D
3
Table 1:
Drive specifications summary for 750 Gbyte models
Drive specification
ST3750640SCE
750
ST3750840SCE
Formatted Gbytes (512 bytes/sector)*
Guaranteed sectors
1,465,149,168
512
Bytes per sector
Default sectors per track
Default read/write heads
Default cylinders
63
16
16,383
Recording density, max
Track density, max
926 kbits/in
145 ktracks/in
2
Areal density, max
128.2 Gbits/in
Spindle speed
7,200 RPM
Internal data transfer rate, max
Sustained data transfer rate, max
I/O data-transfer rate, max
ATA data-transfer modes supported
1,030 Mbits/sec
78 Mbytes/sec
300 Mbytes/sec
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer
16 Mbytes
8 Mbytes
Height, max
26.1 mm (1.028 inches)
Width, max
101.6 mm (4.000 inches) +/- 0.010 inches
Length, max
146.99 mm (5.787 inches)
720 grams
Weight, typical
Average latency
4.16 msec
Power-on to ready, max
Standby to ready, max
Track-to-track seek time, typical
Average seek, read, typical
Average seek, write, typical
Startup current (max) 12V (peak)
Voltage tolerance (including noise)
16 sec
16 sec
<0.8 msec read; <1.0 msec write
<11.0 msec
<12.0 msec
2.0 amps
5V ± 5%
12V ± 10%
Ambient temperature
0° to 60°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient, per hour max
Relative humidity
20°C (operating)
30°C (nonoperating)
5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient, per hour max
Wet bulb temperature, max
30%
37.7°C (operating)
37.7°C (nonoperating)
Altitude, operating
–60.96 m to 3,048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating , max
–60.96 m to 12,192 m below mean sea level
(–200 ft. to 40,000+ ft. below mean sea level)
Operational Shock, max
Non-Operational Shock, max
Vibration, operating
63 Gs at 2 msec
300 Gs at 2 msec
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 0.50 Gs
350–500 Hz:: 0.25 Gs
4
DB35.3 Series Serial ATA Product Manual, Rev. D
Drive specification
ST3750640SCE
ST3750840SCE
Vibration, nonoperating
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 5.0 Gs
350–500 Hz:: 1.0 Gs
Drive acoustics, sound power
Idle**
2.8 bels (typical)
3.0 bels (max)
CE seek profile
3.0 bels (typical)
3.1 bels (max)
14
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Warranty
1 per 10 bits read
0.68%
5 years on distribution units.
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.
Contact start-stop cycles (25°C, 50% rel. humidity)
50,000
Yes
Supports Hotplug operation per Serial ATA Revision 2.5
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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
DB35.3 Series Serial ATA Product Manual, Rev. D
5
Table 2:
Drive specifications summary for 500 and 400 Gbyte models
Drive specification
ST3500830SCE
500
ST3400820SCE
400
Formatted Gbytes (512 bytes/sector)*
Guaranteed sectors
976,773,168
512
781,422,768
Bytes per sector
Default sectors per track
Default read/write heads
Default cylinders
63
16
16,383
Recording density, max
Track density, max
813 kbits/in
145 ktracks/in
781 kbits/in
2
2
Areal density, max
114.4 Gbits/in
128.2 Gbits/in
Spindle speed
7,200 RPM
Internal data transfer rate, max
Sustained data transfer rate, max
I/O data-transfer rate, max
ATA data-transfer modes supported
1,030 Mbits/sec
72 Mbytes/sec
300 Mbytes/sec
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer
8 Mbytes
Height, max
26.1 mm (1.028 inches)
Width, max
101.6 mm (4.000 inches) +/- 0.010 inches
Length, max
146.99 mm (5.787 inches)
635 grams
Weight, typical
Average latency
4.16 msec
Power-on to ready, max
Standby to ready, max
Track-to-track seek time, typical
Average seek, read, typical
Average seek, write, typical
Startup current (max) 12V (peak)
Voltage tolerance (including noise)
16 sec
16 sec
<0.8 msec read, <1.0 msec write
<11.0 msec
<12.0 msec
2.0 amps
5V ± 5%
12V ± 10%
Ambient temperature
0° to 62°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient, per hour max
Relative humidity
20°C (operating)
30°C (nonoperating)
5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient, per hour max
Wet bulb temperature, max
30%
37.7°C (operating)
37.7°C (nonoperating)
Altitude, operating
–60.96 m to 3,048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating, max
–60.96 m to 12,192 m below mean sea level
(–200 ft. to 40,000+ ft. below mean sea level)
Operational Shock, max
Non-Operational Shock, max
Vibration, operating
63 Gs at 2 msec
300 Gs at 2 msec
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 0.50 Gs
350–500 Hz:: 0.25 Gs
6
DB35.3 Series Serial ATA Product Manual, Rev. D
Drive specification
ST3500830SCE
ST3400820SCE
Vibration, nonoperating
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 5.0 Gs
350–500 Hz:: 1.0 Gs
Drive acoustics, sound power
Idle**
2.8 bels (typical)
3.0 bels (max)
2.7 bels (typical)
2.9 bels (max)
CE seek profile
3.0 bels (typical)
3.1 bels (max)
2.9 bels (typical)
3.0 bels (max)
14
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Warranty
1 per 10 bits read
0.68%
5 years on distribution units.
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.
Contact start-stop cycles (25°C, 50% rel. humidity)
50,000
Yes
Supports Hotplug operation per Serial ATA Revision
2.5 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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
DB35.3 Series Serial ATA Product Manual, Rev. D
7
Table 3:
Drive specifications summary for 320 and 300 Gbyte models
Drive specification
ST3320820SCE
320
ST3300820SCE
300
Formatted Gbytes (512 bytes/sector)*
Guaranteed sectors
625,142,448
512
586,072,368
Bytes per sector
Default sectors per track
Default read/write heads
Default cylinders
63
16
16,383
Recording density, max
Track density, max
781 kbits/in
145 ktracks/in
2
Areal density, max
114.4 Gbits/in
Spindle speed
7,200 RPM
Internal data transfer rate, max
Sustained data transfer rate, max
I/O data-transfer rate, max
ATA data-transfer modes supported
1,030 Mbits/sec
72 Mbytes/sec
300 Mbytes/sec
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer
8 Mbytes
Height (mm max)
26.1 mm (1.028 inches)
Width (mm max)
101.6 mm (4.000 inches) +/- 0.010 inches
Length (mm max)
146.99 mm (5.787 inches)
635 grams
Weight (max)
Average latency
4.16 msec
Power-on to ready, max
Standby to ready, max
Track-to-track seek time, typical
Average seek, read, typical
Average seek, write, typical
Startup current (max) 12V (peak)
Voltage tolerance (including noise)
16 sec
16 sec
<0.8 msec read; <1.0 msec write
<11.0 msec
<12.0 msec
2.0 amps
5V ± 5%
12V ± 10%
Ambient temperature
0° to 65°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient, per hour max
Relative humidity
20°C (operating)
30°C (nonoperating)
5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient, per hour max
Wet bulb temperature, max
30%
37.7°C (operating)
37.7°C (nonoperating)
Altitude, operating
–60.96 m to 3,048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating, max
–60.96 m to 12,192 m below mean sea level
(–200 ft. to 40,000+ ft. below mean sea level)
Operational Shock, max
Non-Operational Shock, max
Vibration, operating
63 Gs at 2 msec
300 Gs at 2 msec
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 0.50 Gs
350–500 Hz:: 0.25 Gs
8
DB35.3 Series Serial ATA Product Manual, Rev. D
Drive specification
ST3320820SCE
ST3300820SCE
Vibration, nonoperating
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 5.0 Gs
350–500 Hz:: 1.0 Gs
Drive acoustics, sound power
Idle**
2.7 bels (typical)
2.9 bels (max)
2.5 bels (typical)
2.7 bels (max)
CE seek profile
2.9 bels (typical)
3.0 bels (max)
2.8 bels (typical)
2.9 bels (max)
14
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Warranty
1 per 10 bits read
0.68%
5 years on distribution units.
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.
Contact start-stop cycles (25°C, 50% rel. humidity)
50,000
Yes
Supports Hotplug operation per Serial ATA Revision 2.5
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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
DB35.3 Series Serial ATA Product Manual, Rev. D
9
Table 4:
Drive specifications summary for 250 Gbyte models
Drive specification
ST3250820SCE
250
Formatted Gbytes (512 bytes/sector)*
Guaranteed sectors
488,397,168
512
Bytes per sector
Default sectors per track
Default read/write heads
Default cylinders
63
16
16,383
Recording density, max
Track density, max
813 kbits/in
145 ktracks/in
2
Areal density, max
114.4 Gbits/in
Spindle speed
7,200 RPM
Internal data transfer rate, max
Sustained data transfer rate, max
I/O data-transfer rate, max
ATA data-transfer modes supported
1,030 Mbits/sec
72 Mbytes/sec
300 Mbytes/sec
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Cache buffer
8 Mbytes
Height, max
26.1 mm (1.028 inches)
101.6 mm (4.000 inches) +/- 0.010 inches
146.99 mm (5.787 inches)
580 grams (1.28 lb.)
4.16 msec
Width, max
Length, max
Weight, typical
Average latency
Power-on to ready, max
Standby to ready, max
Track-to-track seek time, typical
Average seek, read, typical
Average seek, write, typical
Startup current (max) 12V (peak)
Voltage tolerance (including noise)
16 sec
16 sec
<0.8 msec read; <1.0 msec write
<11.0 msec
<12.0 msec
2.0 amps
5V ± 5%
12V ± 10%
Ambient temperature
0° to 65°C (operating)
–40° to 70°C (nonoperating)
Temperature gradient, per hour max
Relative humidity
20°C (operating)
30°C (nonoperating)
5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient, per hour max
Wet bulb temperature, max
30%
37.7°C (operating)
37.7°C (nonoperating)
Altitude, operating
–60.96 m to 3,048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating, max
–60.96 m to 12,192 m below mean sea level
(–200 ft. to 40,000+ ft. below mean sea level)
Operational Shock, max
Non-Operational Shock, max
Vibration, operating
63 Gs at 2 msec
350 Gs at 2 msec
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 0.50 Gs
350–500 Hz:: 0.25 Gs
10
DB35.3 Series Serial ATA Product Manual, Rev. D
Drive specification
ST3250820SCE
Vibration, nonoperating
5–22 Hz: 0.25 Gs, Limited displacement
22–350 Hz: 5.0 Gs
350–500 Hz:: 1.0 Gs
Drive acoustics, sound power
Idle**
2.5 bels (typical)
2.7 bels (max)
CE seek profile
2.8 bels (typical)
2.9 bels (max)
14
Nonrecoverable read errors
Annualized Failure Rate (AFR)
Warranty
1 per 10 bits read
0.68%
5 years on distribution units.
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 num-
ber) and country of purchase. The system will display the warranty
information for your drive.
Contact start-stop cycles
(25°C, 50% rel. humidity)
50,000
Supports Hotplug operation per Serial ATA Revision 2.5
specification
Yes
*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 activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
DB35.3 Series Serial ATA Product Manual, Rev. D
11
2.2
Formatted capacity
Formatted
capacity*
Guaranteed
sectors
Model
Bytes per sector
ST3750640SCE
ST3750840SCE
ST3500830SCE
ST3400820SCE
ST3320820SCE
ST3300820SCE
ST3250820SCE
750 Gbytes
750 Gbytes
500 Gbytes
400 Gbytes
320 Gbytes
300 Gbytes
250 Gbytes
1,465,149,168
1,465,149,168
976,773,168
781,422,768
625,142,448
586,072,368
488,397,168
512
512
512
512
512
512
512
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
2.2.1
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 137 Gbytes.
2.3
Default logical geometry
Cylinders
Read/write heads
Sectors per track
63
16,383
16
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.
12
DB35.3 Series Serial ATA Product Manual, Rev. D
2.4
Recording and interface technology
750GB
500GB
400GB
320GB
300GB
250GB
Interface
Serial ATA (SATA)
Perpendicular
Recording method
Recording density, KBPI (kbits/inch max)
Track density, KTPI (ktracks/inch avg)
926
813
781
813
145
2
Areal density (Gbits/inch avg)
128.2
7,200
1,030
78
114.4
Spindle speed (RPM) (± 0.2%)
Internal data transfer rate (Mbits/sec max)
Sustained data transfer rate (Mbytes/sec max)
I/O data-transfer rate (Mbytes/sec max)
72
300 (Ultra DMA mode 5)
2.5
Physical characteristics
Drive specification
Maximum height
Maximum width
Maximum length
Typical weight
(mm)
(inches)
26.1
1.028
(mm)
(inches)
101.6
4.000 +/- 0.010
(mm)
(inches)
146.99
5.787
ST3320820SCE, ST3300820SCE and ST3250820SCE
ST3500830SCE and ST3400820SCE
ST3750640SCE and ST3750840SCE
580 grams (1.28 lbs)
635 grams (1.40 lbs)
720 grams (1.59 lbs)
Cache Size
ST3750640SCE
16 Mbytes
8 Mbytes
ST3750840SCE
ST3500830SCE
ST3400820SCE
ST3320820SCE
ST3300820SCE
ST3250820SCE
DB35.3 Series Serial ATA Product Manual, Rev. D
13
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 (msec)
Track-to-track
Read
<0.8
Write
<1.0
Average
<11.0
4.16
<12.0
4.16
Average latency:
Note. 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.
2.7
Start/stop times
Power-on to Ready (sec)
16 (max)
16 (max)
10 (max)
Standby to Ready (sec)
Ready to spindle stop (sec)
2.8
Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 4 on page 26.
2.8.1 Power consumption
Power requirements for the drives are listed in the table on page 9. 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.
• Seek mode
During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and
does not execute a read or write operation. Servo electronics are active. Seek mode power represents the
worst-case power consumption, using only random seeks with read or write latency time. This mode is not
typical and is provided for worst-case information.
• 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-msec
delay, then a 16-sector read followed by a 32-msec delay.
14
DB35.3 Series Serial ATA Product Manual, Rev. D
• 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.
Table 5:
DC power requirements
Power dissipation (ST3750640SCE values shown) Avg (watts 25° C)
Avg 5V typ amps Avg 12V typ amps
Spinup
—
—
2.0 (peak)
0.540
Idle*
9.30
10.40
9.4
0.611
0.719
0.580
0.106
0.106
Idle* (with offline activity)
Operating (CE seeks)
Standby
0.567
0.540
0.80
0.80
0.023
Sleep
0.023
*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.
2.8.1.1
Typical current profiles
Figure 1. Typical 5V startup and operation current profile
DB35.3 Series Serial ATA Product Manual, Rev. D
15
Figure 2. Typical 12V startup and operation current profile
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 10 MHz.
• 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 10 MHz.
Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write
current.
2.8.3
Voltage tolerance
Voltage tolerance (including noise):
5V ± 5%
12V ± 10%
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.
16
DB35.3 Series Serial ATA Product Manual, Rev. D
• Idle mode
The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disc
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 specifiable 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 commands and returns to Active mode any time disc 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 disc access is necessary.
DB35.3 Series Serial ATA Product Manual, Rev. D
17
2.9
Environmental specifications
Ambient temperature
2.9.1
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive.
Actual drive case temperature should not exceed 75°C (167°F) within the operating ambient conditions. Rec-
ommended measurement locations are shown in Figure 5 on page 27.
Above 1,000 feet (305 meters), the maximum temperature is derated linearly to 112°F (44°C) at 10,000 feet
(3,048 meters).
Operating:
ST3320820SCE, ST3300820SCE and ST3250820SCE
ST3500830SCE and ST3400820SCE
0° to 65°C (32° to 149°F)
0° to 62°C (32° to 143.6°F)
0° to 60°C (32° to 140°F)
ST3750640SCE and ST3750840SCE
Nonoperating:
–40° to 70°C (–40° to 158°F)
2.9.2
Temperature gradient
Operating:
Nonoperating:
20°C per hour (68°F per hour max), without condensation
30°C per hour (86°F per hour max)
2.9.3
2.9.3.1
Humidity
Relative humidity
Operating:
Nonoperating:
5% to 90% noncondensing (30% per hour max)
5% to 95% noncondensing (30% per hour max)
2.9.3.2
Wet bulb temperature
Operating:
37.7°C (99.9°F max)
37.7°C (99.9°F max)
Nonoperating:
2.9.4
Altitude
Operating:
–60.96 m to 3,048 m (–200 ft. to 10,000+ ft.)
–60.96 m to 12,192 m (–200 ft. to 40,000+ ft.)
Nonoperating:
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 63 Gs based on half-sine shock pulses of 2 msec. Shocks should not be repeated more
than two times per second.
18
DB35.3 Series Serial ATA Product Manual, Rev. D
2.9.5.2
Nonoperating shock
2 Disc models
The nonoperating 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 nonrepetitive half-sine shock pulse
of 2 msec duration.
3 and 4 Disc models
The nonoperating 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 nonrepetitive half-sine shock pulse
of 2 msec 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 speci-
fied in this document are specified below.
5–22 Hz
0.25 Gs (Limited displacement)
22–350 Hz
350–500 Hz
0.50 Gs
0.25 Gs
2.9.6.2
Nonoperating vibration
The maximum nonoperating vibration levels that the drive may experience without incurring physical damage
or degradation in performance when subsequently put into operation are specified below.
5–22 Hz
0.25 Gs (limited displacement)
22–350 Hz
350–500 Hz
5.0 Gs
1.0 Gs
DB35.3 Series Serial ATA Product Manual, Rev. D
19
2.10
Acoustics
Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea-
surements 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.
Note. For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is defined
by the following equation:
(Number of seeks per second = 0.4 / (average latency + average access time)
Table 6:
Fluid Dynamic Bearing (FDB) motor acoustics
Idle*
CE seek profile
ST3750640SCE
ST3750840SCE
2.8 bels (typ)
3.0 bels (max)
3.0 bels (typ)
3.1 bels (max)
ST3500830SCE
ST3400820SCE
ST3320820SCE
ST3300820SCE
ST3250820SCE
2.8 bels (typ)
3.0 bels (max)
3.0 bels (typ)
3.1 bels (max)
2.7 bels (typ)
2.9 bels (max)
2.9 bels (typ)
3.0 bels (max)
2.7 bels (typ)
2.9 bels (max)
2.9 bels (typ)
3.0 bels (max)
2.5 bels (typ)
2.7 bels (max)
2.8 bels (typ)
2.9 bels (max)
2.5 bels (typ)
2.7 bels (max)
2.8 bels (typ)
2.9 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.
20
DB35.3 Series Serial ATA Product Manual, Rev. D
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:
Table 7:
Test
Radio frequency environments
Description
Performance level
Reference standard
Electrostatic
discharge
Contact, HCP, VCP: ± 4 kV; Air: ± 8 kV
B
EN 61000-4-2: 95
Radiated RF
immunity
80 to 1,000 MHz, 3 V/m,
A
B
EN 61000-4-3: 96
ENV 50204: 95
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz
Electrical fast
transient
± 1 kV on AC mains, ± 0.5 kV on external I/O
EN 61000-4-4: 95
Surge immunity ± 1 kV differential, ± 2 kV common, AC mains
B
A
EN 61000-4-5: 95
EN 61000-4-6: 97
Conducted RF
immunity
150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz sine
Voltage dips,
interrupts
0% open, 5 seconds
0% short, 5 seconds
40%, 0.10 seconds
70%, 0.01 seconds
C
C
C
B
EN 61000-4-11: 94
2.12
Reliability
14
Nonrecoverable read errors
Annualized Failure Rate (AFR)
1 per 10 bits read, max
0.68% (nominal power, 25°C ambient temperature)
Contact start-stop cycles
50,000 cycles
(at nominal voltage and temperature, with 60 cycles per hour and a 50% duty cycle)
5 years on distribution units.
Warranty
To determine the warranty for a specific drive, use a web browser to access the fol-
lowing 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.
Preventive maintenance
None required.
2.13
Agency certification
2.13.1
Safety certification
The drives are recognized in accordance with UL 1950 and CSA C22.2 (950) and meet all applicable sections
of IEC950 and EN 60950 as tested by TUV North America.
2.13.2
Electromagnetic compatibility
Hard drives that display the CE mark comply with the European Union (EU) requirements specified in the Elec-
tromagnetic Compatibility Directive (89/336/EEC). 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.
DB35.3 Series Serial ATA Product Manual, Rev. D
21
Seagate uses an independent laboratory to confirm compliance with the EC directives specified in the previous
paragraph. 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 Korea Ministry of Information and Communication (MIC) logo, they comply with para-
graph 1 of Article 11 of the Electromagnetic Compatibility control Regulation and meet the Electromagnetic
Compatibility (EMC) Framework requirements of the Radio Research Laboratory (RRL) Ministry of Information
and Communication Republic of Korea.
These drives have been tested and comply with the Electromagnetic Interference/Electromagnetic Susceptibil-
ity (EMI/EMS) for Class B products. Drives are tested in a representative, end-user system by a Korean-recog-
nized lab.
• EUT name (model numbers): DB35 Series
• Certificate number: STX-L3510 (B)
• Trade name or applicant: Seagate Technology
• Manufacturing date: March 2006
• Manufacturer/nationality: Singapore and China
Australian C-Tick (N176)
If these models have the C-Tick marking, they comply with the Australia/New Zealand Standard AS/NZS3548
1995 and meet the Electromagnetic Compatibility (EMC) Framework requirements of the Australian Communi-
cation Authority (ACA).
2.13.3
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 mar-
keted to the customer. As a subassembly, no Federal Communications Commission verification or certification
of the device is required.
Seagate Technology LLC has tested this device in enclosures as described above to ensure that the total
assembly (enclosure, disc 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 noncertified 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.
This equipment is designed to provide reasonable protection against such interference in a residential installa-
tion. 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.
22
DB35.3 Series Serial ATA Product Manual, Rev. D
If necessary, you should consult your dealer or an experienced radio/television technician for additional sug-
gestions. 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 Super-
intendent of Documents, U.S. Government Printing Office, Washington, DC 20402. Refer to publication num-
ber 004-000-00345-4.
2.14
Environmental protection
Seagate designs its products to meet environmental protection requirements worldwide, including regulations
restricting certain chemical substances.
2.14.1
European Union Restriction of Hazardous Substances (RoHS) Directive
Seagate designs its products to meet environmental protection requirements worldwide, including regulations
restricting certain chemical substances. A new law, 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.
2.14.2
2.14.2
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
"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
2.15
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
DB35.3 Series Serial ATA Product Manual, Rev. D
23
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, chlo-
ride, 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 vulca-
nized 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.
24
DB35.3 Series Serial ATA Product Manual, Rev. D
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 dis-
charge (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.
DB35.3 Series Serial ATA Product Manual, Rev. D
25
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. If
you have a motherboard or host adapter that does not support autonegotiation:
• Install a jumper as shown in Figure 3 below to limit the data transfer rate to 1.5 Gbits per second (and leave
the drive connected to the SATA-equipped motherboard or host adapter that doesn’t support autonegotiation)
or
• Install a SATA host adapter that supports autonegotiation, leave the drive jumper block set to “Normal
operation” (see Figure 3 below), and connect the drive to that adapter. This option has the benefit of not limiting
the drive to a 1.5 Gbits/sec transfer rate.
3.0 Gbits per second operation
Limit data transfer rate to
1.5 Gbits per second
Jumper block
SATA interface connector
Figure 3. Serial ATA connectors
SATA power connector
3.3
Serial ATA cables and connectors
The Serial ATA interface cable consists of four conductors in two differential pairs, plus three ground connec-
tions. 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.
Signal connector
Power connector
Signal cable
Power cable
Figure 4. Attaching SATA cabling
Each cable is keyed to ensure correct orientation. DB35.3 Series Serial ATA drives support latching SATA con-
nectors.
26
DB35.3 Series Serial ATA Product Manual, Rev. D
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 5 on page 27 for drive mounting dimensions. Follow these important
mounting precautions when mounting the drive:
• Allow a minimum clearance of 0.030 inches (0.76 mm) 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 (3.81 mm) into the bottom or side mounting holes.
• Do not overtighten the mounting screws (maximum torque: 6 inch-lb).
Recommended
case temperature
measurement location
[1]
5.787 (146.9898) max.
.250 + .015
(6.35 + .381)
(3x both sides)
1.638
(41.605)
1.122
+ .020
(28.499
+ .508)
[1]
[1]
4.000
(101.60)
[1]
4.000
(101.6)
1.028 max
(26.111 max)
[1]
.138
(3.505)
.814
(20.676)
C of conn. Datum B
L
2.00
Notes:
(50.80)
Dimensions are shown in inches (mm).
[1] Dimensions per SFF-8301 specification
C of drive
L
[1]
2 x 3.750
(2 x 95.25)
2 x 1.625
(2 x 41.28)
[1]
[1]
2 x 1.750
(2 x 44.45)
4.000
(101.6)
[1]
Recommended
case temperature
measurement location
Figure 5. Mounting dimensions—top, side and end view
DB35.3 Series Serial ATA Product Manual, Rev. D
27
28
DB35.3 Series Serial ATA Product Manual, Rev. D
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 0–4; multiword DMA modes 0–2, and Ultra DMA modes 0–6.
For detailed information about the Serial ATA interface, refer to the “Serial ATA: High Speed Serialized AT
Attachment” specification.
4.1
Hot-Plug compatibility
DB35.3 Series Serial ATA drives incorporate connectors which enable you to hot plug these drives in accor-
dance with the Serial ATA II: Extension to Serial ATA 1.0a specification. This specification can be downloaded
DB35.3 Series Serial ATA Product Manual, Rev. D
29
4.2
Serial ATA device plug connector pin definitions
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+
Signal
S7
Ground
2nd mate
Key and spacing separate signal and power segments
P1
V33
3.3V power
P2
V33
3.3V power
P3
V33
3.3V power, pre-charge, 2nd mate
1st mate
P4
Ground
Ground
Ground
V5
P5
2nd mate
P6
2nd mate
P7
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.
4. All used voltage pins (Vx) must be terminated.
30
DB35.3 Series Serial ATA Product Manual, Rev. D
4.3
Supported ATA commands
The following table lists Serial ATA standard commands that the drive supports. For a detailed description of
Table 9:
Supported ATA commands
Command name
Command code (in hex)
98 or E5
Check Power Mode
Device Configuration Freeze Lock
Device Configuration Identify
Device Configuration Restore
Device Configuration Set
Device Reset
H
H
B1 / C1
H
H
B1 / C2
H
H
H
H
B1 / C0
H
B1 / C3
H
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
97 or E3
H
H
Idle Immediate
95 or E1
H
H
Initialize Device Parameters
Read Buffer
91
H
E4
H
Read DMA
C8
H
Read DMA Extended
Read DMA Without Retries
Read Log Ext
25
H
C9
H
H
2F
Read Multiple
C4
H
Read Multiple Extended
Read Native Max Address
Read Native Max Address Extended
Read Sectors
29
H
F8
H
H
H
H
H
H
H
H
H
27
20
24
21
40
42
41
10
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
F6
H
H
F3
DB35.3 Series Serial ATA Product Manual, Rev. D
31
Command name
Security Erase Unit
Security Freeze
Security Set Password
Security Unlock
Seek
Command code (in hex)
F4
F5
F1
F2
H
H
H
H
H
70
Set Features
EF
H
Set Max Address
F9
H
Note: Individual Set Max Address
commands are identified by the value
placed in the Set Max Features regis-
ter 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
Sleep
99 or E6
H
H
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
B0 / D2
H
H
H
H
H
H
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
96 or E2
H
H
H
Standby Immediate
94 or E0
H
Write Buffer
E8
H
Write DMA
CA
H
Write DMA Extended
35
H
Write DMA FUA Extended
Write DMA Without Retries
Write Log Extended
CD
H
H
CB
3F
H
Write Multiple
C5
H
Write Multiple Extended
Write Multiple FUA Extended
Write Sectors
39
H
CE
H
30
31
34
H
Write Sectors Without Retries
Write Sectors Extended
H
H
32
DB35.3 Series Serial ATA Product Manual, Rev. D
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 Table 9 on
page 31. All reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or
The following commands contain drive-specific features that may not be included in the Serial ATA specifica-
tion.
Word
Description
Value
0C5A
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
H
0
1
Number of logical cylinders
16,383
2
ATA-reserved
0000
16
H
3
Number of logical heads
4
Retired
0000
0000
H
H
5
Retired
6
Number of logical sectors per logical track: 63
Retired
003F
H
H
7–9
10–19
20
0000
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
0000
H
48
Reserved
H
49
Standard Standby timer, IORDY supported and may be disabled
ATA-reserved
2F00
H
H
H
H
H
50
0000
0200
0200
0007
51
PIO data-transfer cycle timing mode
Retired
52
53
Words 54–58, 64–70 and 88 are valid
Number of current logical cylinders
Number of current logical heads
Number of current logical sectors per logical track
Current capacity in sectors
54
xxxx
xxxx
xxxx
xxxx
xxxx
H
55
H
H
H
H
56
57–58
59
Number of sectors transferred during a Read Multiple or Write Multiple
command
DB35.3 Series Serial ATA Product Manual, Rev. D
33
Word
Description
Value
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, 137 Gbytes). Drives with capacities over 137
Gbytes 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)
Minimum multiword DMA transfer cycle time per word (120 nsec)
0003
0078
0078
H
H
H
Recommended multiword DMA transfer cycle time per word (120
nsec)
67
Minimum PIO cycle time without IORDY flow control (240 nsec)
Minimum PIO cycle time with IORDY flow control (120 nsec)
ATA-reserved
00F0
H
H
H
H
68
0078
0000
0000
69–74
75
Queue depth
76
Serial ATA capabilities
xxxx
xxxx
xxxx
xxxx
H
77
Reserved for future Serial ATA definition
Serial ATA features supported
Serial ATA features enabled
H
H
H
78
79
80
Major version number
003E
H
H
81
Minor version number
0000
82
Command sets supported
364B
H
83
Command sets supported
7C03
H
84
Command sets support extension
Command sets enabled
4003
H
85
30xx
H
86
Command sets enabled
0001
4000
H
H
H
87
Command sets enable extension
Ultra DMA support and current mode (see note following this table)
Security erase time
88
xx3F
89
0000
H
H
90
Enhanced security erase time
Master password revision code
Hardware reset value (see description following this table)
ATA-reserved
0000
92
FFFE
H
93
xxxx
H
95–99
0000
H
100–
103
Total number of user-addressable LBA sectors available (see Section
2.2 for related information). These words are required for drives that
support the 48-bit addressing feature. Maximum value:
0000FFFFFFFFFFFFh.
ST3750640SCE = 1,465,149,168
ST3750840SCE = 1,465,149,168
ST3500830SCE = 976,773,168
ST3400820SCE = 781,422,768
ST3320820SCE = 625,142,448
ST3300820SCE = 586,072,368
ST3250820SCE = 488,397,168
ST3200820SCE = 390,721,968
34
DB35.3 Series Serial ATA Product Manual, Rev. D
Word
Description
Value
104–
127
ATA-reserved
0000
H
128
Security status
0001
H
129–
159
Seagate-reserved
xxxx
H
160–
254
ATA-reserved
Integrity word
0000
xxA5
H
H
255
Note. Advanced Power Management (APM) and Automatic Acoustic Management (AAM) features are not supported
DB35.3 Series Serial ATA Product Manual, Rev. D
35
Note. See the bit descriptions below for words 63, 88, and 93 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.
Word 88
1
2
8
9
10
Bit
0
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
36
DB35.3 Series Serial ATA Product Manual, Rev. D
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 inter-
rupt. 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:
Table 10:
Set Features command values
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
Note. At power-on, or after a hardware or software reset, the default values of the features are as indi-
cated above.
DB35.3 Series Serial ATA Product Manual, Rev. D
37
4.3.3
S.M.A.R.T. commands
S.M.A.R.T. provides near-term failure prediction for disc drives. When S.M.A.R.T. is enabled, the drive moni-
tors 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 elimi-
H
nates 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.
Table 11:
S.M.A.R.T. commands
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
Note. If an appropriate code is not written to the Features Register, the command is aborted and 0x04
(abort) is written to the Error register.
38
DB35.3 Series Serial ATA Product Manual, Rev. D
5.0
Seagate Technology support services
Internet
For information regarding Seagate products and services, visit www.seagate.com. Worldwide support is
available 24 hours daily by email for your questions.
Presales Support:
Technical Support:
Warranty Support:
mySeagate
my.seagate.com is the industry's first Web portal designed specifically for OEMs and distributors. It provides
self-service access to critical applications, personalized content and the tools that allow our partners to
manage their Seagate account functions. Submit pricing requests, orders and returns through a single,
password-protected Web interface-anytime, anywhere in the world.
spp.seagate.com
spp.seagate.com supports Seagate resellers with product information, program benefits and sales tools. You
may register for customized communications that are not available on the web. These communications contain
product launch, EOL, pricing, promotions and other channel-related information. To learn more about the
benefits or to register, go to spp.seagate.com, any time, from anywhere in the world.
Seagate Service Centers
Presales Support
Our Presales Support staff can help you determine which Seagate products are best suited for your specific
application or computer system, as well as product availability and compatibility.
Technical Support
Seagate technical support is available to assist you online at support.seagate.com or through one of our call
centers. Have your system configuration information and your “ST” model number available.
SeaTDD™ (+1-405-324-3655) is a telecommunications device for the deaf (TDD). You can send questions or
comments 24 hours daily and exchange messages with a technical support specialist during normal business
hours for the call center in your region.
DB35.3 Series Serial ATA Product Manual, Rev. D
39
Customer Service Operations
Warranty Service
Seagate offers worldwide customer support for Seagate products. Seagate distributors, OEMs and other direct
customers should contact their Seagate Customer Service Operations (CSO) representative for warranty-
related issues. Resellers or end users of drive products should contact their place of purchase or Seagate
warranty service for assistance. Have your serial number and model or part number available.
Data Recovery Services
Seagate offers data recovery services for all formats and all brands of storage media. Our data recovery
services labs are currently located throughout the world. . Additional information, including an online request
form and data loss prevention resources, is available at http://services.seagate.com/index.aspx
Authorized Service Centers
Seagate Service Centers are available on a global basis for the return of defective products. Contact your
customer support representative for the location nearest you.
USA/Canada/Latin America support services
For an extensive list of telephone numbers to technical support, presales and warranty service in USA/
Global Customer Support
Presales, Technical, and Warranty Support
Call Center
USA, Canada,
and Mexico
Toll-free
Direct dial
1-800-SEAGATE
+1-405-324-4700
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Call Center
Toll-free
Direct dial
FAX
USA, Canada,
and Mexico
1-800-475-01435
+1-905-474-2162
1-800-475-0158
+1-905-474-2459
Europe, the Middle East and Africa Support Services
For an extensive list of telephone numbers to technical support, presales and warranty service in Europe, the
Asia/Pacific Support Services
For an extensive list of telephone numbers to technical support, presales and warranty service in Asia/Pacific,
40
DB35.3 Series Serial ATA Product Manual, Rev. D
Index
A
ACA 22
acceleration 19
acoustics 20
Active 16
altitude 18
Australia/New Zealand Standard AS/NZS3548 1995
dimensions 27
dissipation 15
E
Electromagnetic Compatibility Directive (89/336/EEC)
errors 21
B
BPI 13
ESD 25
EU 21
C
capacity 12
certification 21
F
features 1
compatibility 21
connectors 26
G
cycles 21
geometry 12
Gs 19
Cylinders 12
H
D
height 13
density 13
humidity 18
I
DB35.3 Series Serial ATA Product Manual, Rev. D
41
IEC950 21
is 14
precautions 25
Q
ITE 21
R
K
Korea Ministry of Information and Communication
(MIC) 22
L
latency 14
length 13
M
maintenance 21
master/slave 2
Recalibrate 31
MIC 22
mounting 27
N
noise 16
Reliability 21
RF 21
RoHS 23
O
operating 15
RRL 22
S
P
42
DB35.3 Series Serial ATA Product Manual, Rev. D
44
DB35.3 Series Serial ATA Product Manual, Rev. D
Seagate Technology LLC
920 Disc Drive, Scotts Valley, California 95066-4544, USA
Publication Number: 100427570, Rev. D, Printed in U.S.A.
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