Product Manual
Momentus 7200.3 SATA
ST9320421AS
ST9320421ASG
ST9250421AS
ST9250421ASG
ST9200421AS
ST9200423ASG
ST9160411AS
ST9160411ASG
ST9120411AS
ST9120411ASG
ST980411AS
ST980411ASG
100512541
Rev. C
July 2008
Contents
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Wet bulb temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Free Fall Protection feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.0
Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Momentus 7200.3 SATA Product Manual, Rev. C
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ii
Momentus 7200.3 SATA Product Manual, Rev. C
List of Figures
Figure 4.
Typical +5V only startup and operation current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Momentus 7200.3 SATA Product Manual, Rev. C
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1.0
Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate
Momentus® 7200.3 SATA model drives:
• ST9320421AS
• ST9320421ASG
• ST9250421AS
• ST9250421ASG
• ST9200421AS
• ST9200423ASG
• ST9160411AS
• ST9160411ASG
• ST9120411AS
• ST9120411ASG
• ST980411AS
• ST980411ASG
These drives provide the following key features:
• 7,200-RPM spindle speed.
• 16-Mbyte buffer.
• Free Fall Protection (on ST9320421ASG, ST9250421ASG, ST9200423ASG, ST9160411ASG,
ST9120411ASG and ST980411ASG models only)
• Quiet operation. Fluid Dynamic Bearing (FDB) motor.
• High instantaneous (burst) data-transfer rates (up to 3.0 Gbits per second).
• Perpendicular recording technology.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Native Command Queuing (NCQ) with command ordering.
• Full-track multiple-sector transfer capability without local processor intervention.
• 1,000 Gs nonoperating shock and 350 Gs of operating shock.
• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• The 3D Defense System™, which includes Drive Defense, Data Defense and Diagnostic Defense, offers the
industry’s most comprehensive protection for disc drives.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Support for Read Multiple and Write Multiple commands.
Momentus 7200.3 SATA Product Manual, Rev. C
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 normally 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 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
Momentus 7200.3 SATA Product Manual, Rev. C
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
ST9320421AS, ST9320421ASG, ST9250421AS, ST9250421ASG, ST9200421AS, ST9200423ASG,
ST9160411AS, ST9160411ASG, ST9120411AS, ST9120411ASG, ST980411AS and ST980411ASG models.
2.1
Specification summary table
The specifications listed in this table are for quick reference. For details on specification measurement or defi-
nition, see the appropriate section of this manual.
Table 1:
Drive specifications
ST9320421AS
ST9250421AS
ST9200421AS
ST9160411AS
ST9120411AS
ST980411AS
Drive specification
ST9320421ASG
ST9250421ASG
ST9200423ASG
ST9160411ASG
ST9120411ASG
ST980411ASG
Formatted Gbytes
(512 bytes/sector)*
320
250
200
160
120
80
Guaranteed sectors
Bytes per sector
Physical read/write heads
Discs
625,142,448
488,397,168
390,721,968
312,581,808
234,441,648
156,301,488
512
4
3
2
3
2
2
1
2
1
1
1
2
Cache (Mbytes)
16
Recording density in BPI
(bits/inch max)
1,334k
Track density TPI
(tracks/inch max)
190k
253
Areal density
(Gbits/inch2 max)
Spindle speed (RPM)
7,200
4.17
1.1
Average latency (msec)
Internal transfer rate
(Gbits/sec max)
I/O data transfer rate
(Gbits/sec max)
3.0
ATA data-transfer modes
supported
SATA 1.0, Serial ATA Revision 2.6
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Height (max)
Width (max)
Length (max)
Weight (max)
9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
69.85 +/- 0.249 mm (2.75 +/- 0.0098 inches)
100.3 +/- 0.25 mm (3.95 +/- .010 inches)
110 grams (0.238 lb)
105 grams (0.227 lb)
Power-on to ready
(sec typical)
4.0
Momentus 7200.3 SATA Product Manual, Rev. C
3
Table 1:
Drive specifications
ST9320421AS
ST9250421AS
ST9200421AS
ST9160411AS
ST9120411AS
ST980411AS
Drive specification
ST9320421ASG
ST9250421ASG
ST9200423ASG
ST9160411ASG
ST9120411ASG
ST980411ASG
Standby to ready
(sec typical)
3.0
Track-to-track seek time,
read (msec typical)
1.0
Average seek, read
(msec typical)
11.0
Average seek, write
(msec typical)
13.0
Startup current, +5V (max)
Seek power (typical)
Read power (typical)
Write power (typical)
1.0 amps
2.3 watts
2.1 watts
2.3 watts
0.75 watts
Idle mode, low power
(typical)
Standby mode
Sleep mode
0.21 watts (typical)***
0.21 watts (typical)***
+5V ± 5%
Voltage tolerance
(including noise)
Ambient temperature
0°C to 60°C (operating), –40°C to 70°C (nonoperating)
Temperature gradient
(°C per hour max)
20°C (operating)
35°C (nonoperating)
Relative humidity
5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient
30% per hour max
Wet bulb temperature
(°C max)
30 (operating)
40 (nonoperating)
Altitude, operating
–304.8 m to 3,048 m (–1,000 ft to 10,000+ ft)
–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)
Altitude, nonoperating
(meters below mean sea
level, max)
Shock, operating
350
(Gs max at 2 msec)
Shock, nonoperating
(Gs max at 2 msec)
800
Shock, nonoperating
(Gs max at 1 msec)
1,000
600
Shock, nonoperating
(Gs max at 0.5 msec)
Vibration, operating
1.0 G (0 to peak, 5–500 Hz)
5 Gs (0 to peak, 10–500 Hz)
Vibration, nonoperating
Drive acoustics, sound
power (bels)
Idle**
2.3 (typical)
2.5 (max)
Performance seek
2.6 (typical)
2.7 (max)
Nonrecoverable read errors 1 per 1014 bits read
Annualized Failure Rate
(AFR)
0.48%
4
Momentus 7200.3 SATA Product Manual, Rev. C
Table 1:
Drive specifications
ST9320421AS
ST9250421AS
ST9200421AS
ST9160411AS
ST9120411AS
ST980411AS
Drive specification
ST9320421ASG
ST9250421ASG
ST9200423ASG
ST9160411ASG
ST9120411ASG
ST980411ASG
Load/Unload (U/UL) cycles
25°C, 50% relative humidity 600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
32°C, 80% relative humidity 600,000 software-controlled power on/off cycles
5°C, 80% relative humidity
5°C, 10% relative humidity
55°C, 16% relative humidity
50,000 hard power on/off cycles
Warranty
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 num-
ber, model number (or part number) and country of purchase. The system will display the warranty infor-
mation for your drive.
Supports Hotplug opera-
tion per Serial ATA Revision
2.6 specification
Yes (requires COMRESET from host after a hotplug event)
*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.
***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby
modes will not contribute to battery power consumption.
2.2
Formatted capacity
Model
Formatted capacity*
320 Gbytes
Guaranteed sectors
625,142,448
488,397,168
390,721,968
312,581,808
234,441,648
156,301,488
Bytes per sector
ST9320421AS and ST9320421ASG
ST9250421AS and ST9250421ASG
ST9200421AS and ST9200423ASG
ST9160411AS and ST9160411ASG
ST9120411AS and ST9120411ASG
ST980411AS and ST980411ASG
512
512
512
512
512
512
250 Gbytes
200 Gbytes
160 Gbytes
120 Gbytes
80 Gbytes
*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.
Momentus 7200.3 SATA Product Manual, Rev. C
5
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.
2.4
Physical organization
Drive model
Read/write heads
Number of discs
ST9320421AS and ST9320421ASG
ST9250421AS and ST9250421ASG
ST9200421AS and ST9200423ASG
ST9160411AS and ST9160411ASG
ST9120411AS and ST9120411ASG
ST980411AS and ST980411ASG
4
3
3
2
2
1
2
2
2
1
1
1
2.5
Recording and interface technology
Interface
Serial ATA (SATA)
Recording method
Perpendicular
Recording density BPI (bits/inch max)
Track density TPI (tracks/inch max)
1,334k
190k
2
Areal density (Gbits/inch max)
253
Spindle speed (RPM) ( 0.2%)
Maximum Internal transfer rate (Gbits/sec)
I/O data-transfer rate (Gbits/sec max)
Interleave
7,200
1.1
3.0
1:1
Cache buffer
16 Mbytes (16,384 kbytes)
6
Momentus 7200.3 SATA Product Manual, Rev. C
2.6
Physical characteristics
Drive specification
Height
(mm)
(inches)
9.5 +/-0.2
0.374 +/-0.0078
Width
(mm)
(inches)
69.85 +/-0.249
2.75 +/-0.0098
Length
(mm)
(inches)
100.3 +/-0.25
3.95 +/-.010
Typical weight
ST9320421AS
110 grams
0.238 pounds
ST9320421ASG
ST9250421AS
ST9250421ASG
ST9200421AS
ST9200423ASG
ST9160411AS
ST9160411ASG
ST9120411AS
ST9120411ASG
ST980411AS
105 grams
0.227 pounds
ST980411ASG
2.7
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.
Table 2:
Typical seek times
Typical seek times (msec)
Track-to-track
Read
1.0
Average
11.0
22.0
4.17
Full-stroke
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.
Momentus 7200.3 SATA Product Manual, Rev. C
7
2.8
Start/stop times
Max @ 25°C
Time to ready
Typical
4.0
Power-on to Ready (sec)
Standby to Ready (sec)
8.0
8.0
3.0
2.9
Power specifications
The drive receives DC power (+5V) through a native SATA power connector.
2.9.1 Power consumption
Power requirements for the drives are listed in the table on page 8. Typical power measurements are based on
an average of drives tested, under nominal conditions, at 25°C ambient temperature.
• Spinup power
Spinup power is measured from the time of power-on to the time that the drive spindle 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 is measured based on
three random seek operations every 100 msecs. This mode is not typical.
• Read/write power and current
Read/write power is measured with the heads on track, based on three 63 sector read or write operations
every 100 msecs.
• Idle mode power
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in
a random track location.
• Standby mode
During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/
write electronics are in power-down model
Table 3:
DC power
Power dissipation
Spinup (max)
Seek
+5V input average (25° C)
1.0 amps
2.3 watts
Read
2.1 watts
Write
2.3 watts
Idle, performance*
Idle, active*
Idle, low power mode*
Standby
1.4 watts
1.0 watts
0.75 watts
0.21 watts
0.21 watts
Sleep
*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.
8
Momentus 7200.3 SATA Product Manual, Rev. C
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