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When referring to drive capacity, one gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion bytes. Your
computer’s operating system may use a different standard of measurement and report a lower capacity. In addition, some of the listed
capacity is used for formatting and other functions, and thus will not be available for data storage. Actual quantities will vary based on
various factors, including file size, file format, features and application software. Actual data rates may vary depending on operating
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• High instantaneous (burst) data-transfer rates (up to 3.0 Gbits/sec).
• 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.
• 1000 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 5400.6 SATA PRODUCT MANUAL, REV. G 2
1.1ABOUT THE SERIAL ATA INTERFACE
The Serial ATA interface provides several advantages over the traditional (parallel) ATA interface. The primary advantages
include:
• Easy installation and configuration with true plug-and-play connectivity. It is not 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 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: High Speed Serialized AT Attachment” specification. The
specification can be downloaded from http://www.serialata.org.
MOMENTUS 5400.6 SATA PRODUCT MANUAL, REV. G 3
2.0DRIVE SPECIFICATIONS
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For
convenience, the phrases the drive and this drive are used throughout this manual to indicate the Momentus 5400.6 SATA
models.
2.1SPECIFICATION SUMMARY TABLE
The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the
appropriate section of this manual. .
Table 1 Drive specifications for 500, 400 and 320 GB models
Drive specification
Formatted Gbytes (512 bytes/sector)*500320
Guaranteed sectors976,773,168625,142,448
Bytes per sector512
Physical read/write heads43
Discs22
Cache (Mbytes)8
Recording density in BPI (bits/inch avg)1490k
Track density TPI (tracks/inch avg)265k
Areal density (Gbits/inch2 avg)394
Spindle speed (RPM)5400
Average latency (msec)5.6
Internal transfer rate (Mbits/sec max)1175
I/O data transfer rate
(Mbytes/sec max)
ATA data-transfer modes supportedSATA 1.0, Serial ATA Revision 2.6
Height (max)9.5 +/- 0.2 mm (0.374 +/- .0079 inches)
Width (max)69.85 mm +/- 0.25 mm (2.75 +/- 0.0098 inches)
Length (max)100.35 + 0.20 / - 0.25 mm (3.957 + 0.0079 / - 0.0098 inches)
Weight (max)98.8 grams (0.218 lb)
Power-on to ready (sec typical)3.6
Power-on to ready (sec max)3.8
Standby to ready (sec typical)1.8
Standby to ready (sec max)2
Track-to-track seek time, read (msec typical) 1
Average seek, read (msec typical)14
Full-stroke seek, read (msec max)30
Startup current, +5V (max)1 amp
Seek power (typical)1.54 watts
Read/write power (typical)Read: 1.40 watts; Write: 1.78 watts
Idle mode, low power (typical)0.67 watts
Standby mode0.20 watts (typical)***
Sleep mode0.20 watts (typical)***
Voltage tolerance (including noise)+5V ± 5%
Ambient temperature 0° to 60°C (operating), –40° to 70°C (nonoperating)
Temperature gradient
Table 1 Drive specifications for 500, 400 and 320 GB models
Drive specification
Relative humidity5% to 95% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature
(°C max)
Altitude, operating–304.8 m to 3048 m (–1000 ft to 10,000+ ft)
Altitude, nonoperating
(meters below mean sea level, max)
Shock, operating (Gs max at 2 msec)350
Shock, nonoperating (Gs max at 2 msec)800
Shock, nonoperating (Gs max at 1 msec)1000
Shock, nonoperating (Gs max at 0.5 msec)600
Vibration, operating1.0 G (0 to peak, 5–500 Hz)
Vibration, nonoperating5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels)
Idle**2.4 (typical)
Yes (requires COMRESET from host after a hotplug event)
ST9320325AS
ST9320325ASG
see notes after Table 3.
MOMENTUS 5400.6 SATA PRODUCT MANUAL, REV. G 5
Table 2 Drive specifications for 250 and 160 GB models
Drive specification
Formatted Gbytes (512 bytes/sector)*250160
Guaranteed sectors488,397,168312,581,808
Bytes per sector512
Physical read/write heads2
Discs1
Cache (Mbytes)8
Recording density in BPI (bits/inch avg)1490k1238k
Track density TPI (tracks/inch avg)265k210k
Areal density (Gbits/inch2 avg)394269
Spindle speed (RPM)5400
Average latency (msec)5.6
Internal transfer rate (Mbits/sec max)1175
I/O data transfer rate
(Mbytes/sec max)
ATA data-transfer modes supportedSATA 1.0, Serial ATA Revision 2.6
Height (max)9.5 +/- 0.2 mm (0.374 +/- .0079 inches)
Width (max)69.85 mm +/- 0.25 mm (2.75 +/- 0.0098 inches)
Length (max)100.35 + 0.20 / - 0.25 mm (3.957 + 0.0079 / - 0.0098 inches)
Weight (max)93.5 grams (0.206 lb)105 grams (0.23 lb)
Power-on to ready (sec typical)3.6
Power-on to ready (sec max)3.8
Standby to ready (sec typical)1.8
Standby to ready (sec max)2
Track-to-track seek time, read (msec typical) 1
Average seek, read (msec typical)14
Full-stroke seek, read (msec max)30
Startup current, +5V (max)1 amp
Seek power (typical)1.54 watts
Read/write power (typical)Read: 1.40 watts; Write: 1.78 watts
Idle mode, low power (typical)0.67 watts
Standby mode0.20 watts (typical)***0.22 watts (typical)***
Sleep mode0.20 watts (typical)***0.22 watts (typical)***
Voltage tolerance (including noise)+5V ± 5%
Ambient temperature 0° to 60°C (operating), –40° to 70°C (nonoperating)
Temperature gradient
(°C per hour max)
Relative humidity5% to 95% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature
(°C max)
Altitude, operating–304.8 m to 3,048 m (–1,000 ft to 10,000+ ft)
Altitude, nonoperating
(meters below mean sea level, max)
Shock, operating (Gs max at 2 msec)350
Shock, nonoperating (Gs max at 2 msec)800
Table 2 Drive specifications for 250 and 160 GB models
Drive specification
Shock, nonoperating (Gs max at 1 msec)1000
Shock, nonoperating (Gs max at 0.5 msec)600
Vibration, operating1.0 G (0 to peak, 5–500 Hz)
Vibration, nonoperating5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels)
Idle**2.4 (typical)
Yes (requires COMRESET from host after a hotplug event)
2.0 (typical)
2.2 (max)
2.5 (typical)
2.6 (max)
see notes after Table 3.
MOMENTUS 5400.6 SATA PRODUCT MANUAL, REV. G 7
.
Table 3 Drive specifications for 120 and 80 GB models
Drive specification
Formatted Gbytes (512 bytes/sector)*12080
Guaranteed sectors234,441,648156,301,488
Bytes per sector512
Physical read/write heads1
Discs1
Cache (Mbytes)8
Recording density in BPI (bits/inch avg)1490k
Track density TPI (tracks/inch avg)265k
Areal density (Gbits/inch2 avg)394
Spindle speed (RPM)5400
Average latency (msec)5.6
Internal transfer rate (Mbits/sec max)1175
I/O data transfer rate
(Mbytes/sec max)
ATA data-transfer modes supportedSATA 1.0, Serial ATA Revision 2.6
Height (max)9.5 +/- 0.2 mm (0.374 +/- .0079 inches)
Width (max)69.85 mm +/- 0.25 mm (2.75 +/- 0.0098 inches)
Length (max)100.35 + 0.20 / - 0.25 mm (3.957 + 0.0079 / - 0.0098 inches)
Weight (max)93.5 grams (0.206 lb)
Power-on to ready (sec typical)3.6
Power-on to ready (sec max)3.8
Standby to ready (sec typical)1.8
Standby to ready (sec max)2
Track-to-track seek time, read (msec typical) 1
Average seek, read (msec typical)14
Full-stroke seek, read (msec max)30
Startup current, +5V (max)1 amp
Seek power (typical)1.54 watts
Read/write power (typical)Read: 1.40 watts; Write: 1.78 watts
Idle mode, low power (typical)0.67 watts
Standby mode0.20 watts (typical)***
Sleep mode0.20 watts (typical)***
Voltage tolerance (including noise)+5V ± 5%
Ambient temperature 0° to 60°C (operating), –40° to 70°C (nonoperating)
Temperature gradient
(°C per hour max)
Relative humidity5% to 95% (operating)
Relative humidity gradient30% per hour max
Wet bulb temperature
(°C max)
Altitude, operating–304.8 m to 3048 m (–1000 ft to 10,000+ ft)
Altitude, nonoperating
(meters below mean sea level, max)
Shock, operating (Gs max at 2 msec)350
Shock, nonoperating (Gs max at 2 msec)800
Table 3 Drive specifications for 120 and 80 GB models
Drive specification
Shock, nonoperating (Gs max at 1 msec)1,000
Shock, nonoperating (Gs max at 0.5 msec)600
Vibration, operating1.0 G (0 to peak, 5–500 Hz)
Vibration, nonoperating5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels)
Idle**2.4 (typical)
Yes (requires COMRESET from host after a hotplug event)
ST980313AS
ST980313ASG
*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.
2.2FORMATTED CAPACITY
ModelFormatted capacity*Guaranteed sectors Bytes per sector
ST9500325AS and ST9500325ASG500 Gbytes976,773,168
ST9320325AS and ST9320325ASG320 Gbytes625,142,448
ST9250315AS and ST9250315ASG250 Gbytes488,397,168
512
ST9160314AS and ST9160314ASG160 Gbytes312,581,808
ST9120315AS and ST9120315ASG120 Gbytes234,441,648
ST980313AS and ST980313ASG80 Gbytes156,301,488
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.
2.2.1LBA 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 5400.6 SATA PRODUCT MANUAL, REV. G 9
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