Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or
other countries. Momentus and SeaTools are either trademarks or registered trademarks of Seagate Technology LLC or one of its
affiliated companies in the United States and/or other countries. All other trademarks or registered trademarks are the property of their
respective owners.
No part of this publication may be reproduced in any form without written permission of Seagate Technology LLC.
Call 877-PUB-TEK1(877-782-8351) to request permission.
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
environment and other factors. The export or re-export of hardware or software containing encryption may be regulated by the U.S.
Department of Commerce, Bureau of Industry and Security (for more information, visit www.bis.doc.gov), and controlled for import
and use outside of the U.S. Seagate reserves the right to change, without notice, product offerings or specifications.
This manual describes the functional, mechanical and interface specifications for the following Seagate Momentus® Thin model drives:
ST MODEL #PART #ST MODEL #PART #ST MODEL #PART #
Standard modelsStandard SED modelsSED (FIPS 140-2) models
ST320LT0079ZV142ST320LT0149YK142ST320LT0099WC142
ST250LT0079ZV14CST250LT0149YK14CST250LT0099WC14C
ST160LT0079ZV14DST160LT0149YK14DST160LT0099WC14D
Previous generations of Seagate Self-Encrypting Drive models were called Full Disk
NOTE
NOTE
For more information on FIPS 140-2 Level 2 certification see Section 4.0 on page 21.
Encryption (FDE) models before a differentiation between drive-based encryption
and other forms of encryption was necessary.
The Self-Encrypting Drive models indicated on the cover of this product manual have
provisions for “Security of Data at Rest” based on the standards defined by the
Trusted Computing Group (see www.trustedcomputinggroup.org).
• High instantaneous (burst) data-transfer rates (up to 3Gb/s).
• 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 disk drives.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Support for Read Multiple and Write Multiple commands.
Momentus Thin Self-Encrypting Drive models have the following additional features:
• Automatic data encryption/decryption
• Controlled access
• Random number generator
• Drive locking
• 16 independent data bands
• Cryptographic erase of user data for a drive that will be repurposed or scrapped
• Authenticated firmware download
NOTE
There is no significant performance difference between Self-Encrypting
Drive and standard (non-Self-Encrypting Drive) models.
MOMENTUS THIN PRODUCT MANUAL, GEN-2 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 disk drive in your current system and expect all of your existing
applications to work as normal.
The Serial ATA interface connects each disk drive in a point-to-point configuration with the Serial ATA host adapter. There is no master/
slave relationship with Serial ATA devices like there is with parallel ATA. If two drives are attached on one Serial ATA host adapter, the
host operating system views the two devices as if they were both “masters” on two separate ports. This essentially means both drives
behave as if they are Device 0 (master) devices.
The host adapter may, optionally, emulate a master/slave environment to host software where two
NOTE
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.
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 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 THIN PRODUCT MANUAL, GEN-2 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 all 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
ST320LT007 - 9ZV142
Drive specification
Formatted capacity (GB)*320250160
Guaranteed logical blocks (LBA)625,142,448488,397,168312,581,808
Bytes per physical sector4096
Physical read/write heads21
Disks1
Cache (MB)16
Recording density in BPI (bits/in avg)1397k
Track density TPI (tracks/in avg)315k
Areal density (Gb/in2 avg)425
Spindle speed (RPM)7200
Average latency (ms)4.17
Internal transfer rate (Mb/s max)1247
I/O data transfer rate (Gb/s max)3.0
ATA data-transfer modes supportedSATA 1.0, Serial ATA Revision 2.6
Height (max)7.0 mm (0.276 in)
Width (max)70.10 mm (2.76 in)
Length (max)100.55 mm (3.959 in)
Weight (max)<92.0 g (<0.203 lb)
Power-on to ready (sec typical)3.5
Standby to ready (sec typical)3.0
Track-to-track seek time, read (ms typical) 1.5
Average seek, read (ms typical)11
Startup current, +5V (max)1.0A
Read/write power (typical)Read: 1.6W; Write: 1.9W
Idle mode, low power (typical)0.66W
Standby/Sleep mode (typical)0.15W ***
Voltage tolerance (including noise)+5V ± 10%
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 (–1000 ft. to 10,000+ ft.)
Altitude, nonoperating
Shock, operating (Gs max at 2ms)350
Shock, nonoperating (Gs max at 2ms)800
Shock, nonoperating (Gs max at 1ms)1000
Shock, nonoperating (Gs max at 0.5ms)600
Vibration, operating (Swept Sine)1.0 Gs (0 to peak, 5–500 Hz)
Vibration, nonoperating5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels)
Idle**2.3 (typical)
WarrantyTo determine the warranty for a specific drive, use a web browser to access the following
Supports Hotplug operation per Serial ATA
Revision 2.6 specification
ST320LT009 - 9WC142
ST320LT014 - 9YK142
2.5 (max)
2.7 (max)
14
bits read
600,000 software-controlled power on/off cycles
20,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
20,000 hard power on/off cycles
web page: http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance
You will be asked to provide the drive serial number, model number (or part number)
and country of purchase. After submitting this information, the system will display the
warranty information for your drive.
Yes (requires COMRESET from host after a hotplug event)
*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.
**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.
***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
*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.
625,142,4484096
488,397,168
312,581,808
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 logical blocks (LBA) as defined above.
See Section 5.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-bit addressing support of
drives with capacities over 137GB.
2.3DEFAULT LOGICAL GEOMETRY
CYLINDERSREAD/WRITE HEADSSECTORS PER TRACK
16,3831663
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 logical blocks (LBA) as defined above.
2.4PHYSICAL ORGANIZATION
Models
320GB models21
250GB models
160GB models1
READ/WRITE HEADSNUMBER OF DISKS
MOMENTUS THIN PRODUCT MANUAL, GEN-2 REV. G 6
2.5RECORDING AND INTERFACE TECHNOLOGY
4K SECTOR MODELS
InterfaceSerial ATA (SATA)
Recording methodPerpendicular
Recording density BPI (bits/in avg)1397k
Track density TPI (tracks/in avg)315k
Areal density (Gb/in2 avg)425
Spindle speed (RPM) (± 0.2%)7200
Maximum Internal transfer rate (Mb/s)1247
I/O data-transfer rate (Gb/s max)3.0
Interleave1:1
Cache buffer16 MB (16,384 KB)
2.6PHYSICAL CHARACTERISTICS
DRIVE SPECIFICATION
Height(mm)
(in)
Width(mm)
(in)
Length(mm)
(in)
Weight (max)
All models
6.8 +/-0.2
0.268 +/-0.0079
69.85 +/-0.25
2.75 +/-0.0098
100.35 +0.20/-0.25
3.951 +0.008/-0.010
92.0 g
0.203 lb
2.7SEEK 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 5000 measurements of seeks between random tracks, less overhead.
Table 2 Typical seek times
TYPICAL SEEK TIMES (MS)READ
Track-to-track1.5
Average11
Average latency4.17
These drives are designed to consistently meet the seek times represented in this manual. Physical
NOTE
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 THIN PRODUCT MANUAL, GEN-2 REV. G 7
2.8START/STOP TIMES
TIME TO READYTYPICALMAX @ 25°C
Power-on to Ready (sec)3.54.0
Standby to Ready (sec)3.03.0
2.9POWER SPECIFICATIONS
The drive receives DC power (+5V) through a native SATA power connector.
2.9.1Power 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. These power measurements are done with Interface Power Management modes
like HIPM and DIPM enabled.
• 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 disk 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 100ms. 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 100ms.
• 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 powerdown model
*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.
**Standby power is measured at steady state (after 200ms from transition)
MOMENTUS THIN PRODUCT MANUAL, GEN-2 REV. G 8
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