Product Manual
Momentus
7200-RPM
5400-RPM
Standard models
ST9750423AS
ST9750422AS
ST9750420AS
ST9640424AS
ST9640423AS
ST9500424AS
ST9500423AS
®
Free-fall sensor models
ST9750423ASG
ST9750420ASG
ST9640423ASG
ST9500423ASG
100627937
Rev. B
October 2010
Revision history
Revision Date Sheets affected or comments
Rev. A 09/15/10 Initial release.
Rev. B 10/25/10 fc, 2, 4-9, 13-14, 16 & 26-28.
© 2010 Seagate Technology LLC. All rights reserved.
Publication number: 100627937, Rev. B, October 2010
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.
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. Seagate reserves the right to change, without notice, product
offerings or specifications.
Contents
1.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Specification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2.1 LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.4 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.5 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.7 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.8 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.9 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.9.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.9.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.9.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.9.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.10 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.10.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.10.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.10.3 Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.10.4 Wet bulb temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.10.5 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.10.6 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.10.7 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.11 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.12 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.13 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.13.1 Free Fall Protection feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.14 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.14.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.14.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.14.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.15 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.15.1 European Union Restriction of Hazardous Substances (RoHS) . . . . . . . . . . . . 18
3.15.2 China Restriction of Hazardous Substances (RoHS) Directive . . . . . . . . . . . . . 18
3.16 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1 Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2 Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3 Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.3.3 S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Momentus Product Manual, Rev. B i
ii Momentus Product Manual, Rev. B
List of Figures
Figure 1. Typical +5V only startup and operation current profile (7200-RPM models) . . . . . . . . . . . . . 10
Figure 2. Typical +5V only startup and operation current profile (5400-RPM models) . . . . . . . . . . . . . 10
Figure 3. Serial ATA connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 4. Attaching SATA cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 5. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Momentus Product Manual, Rev. B iii
1.0 Seagate Technology support services
SEAGATE ONLINE SUPPORT and SERVICES
For information regarding products and services, visit http://www.seagate.com/www/en-us/about/contact_us/
Available services include:
Presales & Technical support
Global Support Services telephone numbers & business hours
Authorized Service Centers
For information regarding Warranty Support, visit
http://www.sea
For information regarding Data Recovery Services, visit http://www.i365.com
For Seagate OEM & Distribution partner portal, visit https://direct.seagate.com/portal/system
For Seagate reseller portal, visit http://spp.seagate.com
gate.com/www/en-us/support/warranty_&_returns_assistance
Momentus Product Manual, Rev. B 1
2.0 Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate
Momentus
Standard models Free Fall Protection models
ST9750423AS ST9750423ASG
ST9750422AS
ST9750420AS ST9750420ASG
ST9640424AS
ST9640423AS ST9640423ASG
ST9500424AS
ST9500423AS ST9500423ASG
®
model drives:
These drives provide the following key features:
• 5400-RPM spindle speed (on ST9750423AS, ST9750423ASG, ST9640424AS, ST9640423AS & ST9640423ASG
models only)
• 7200-RPM spindle speed on all other models.
• 16MB buffer.
• Free Fall Protection (on ST9750423ASG, ST9750420ASG, ST9640423ASG and ST9500423ASG models only)
• Quiet operation. Fluid Dynamic Bearing (FDB) motor.
• 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 th e
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.
• Worldwide Name (WWN) capability uniquely identifies the drive.
2 Momentus Product Manual, Rev. B
2.1 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 op tio ns .
• 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 AT A ho st 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 Product Manual, Rev. B 3
3.0 Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power.
3.1 Specification 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 750, 640 and 500 GB models
ST9640424AS
ST9750423AS
Drive specification
Formatted GB 750 640 750 500
Guaranteed sectors 1,465,149,168 1,250,263,728 1,465,149,168 976,773,168
Bytes per sector (logical/physical) 512/4K
Physical read/write heads 4 4/3
Discs 2
Cache (MB) 16
Recording density in BPI (max) 1,586k
Track density TPI (tracks/inch max) 341k
Areal density (Gb/in
Spindle speed (RPM) 5400 7200
Average latency (ms) 5.6 4.2
Internal transfer rate (Gb/s max) 1130 950 1305 1305
I/O data transfer rate (Gb/s max) 3.0
ATA data-transfer modes supported SATA 1.0, Serial ATA Revision 2.6
Height 9.5 +/- 0.2 mm (0.370 +/-.008 in)
Width 69.85 +/- 0.25 mm (2.750 +/- 0.010 in)
Length 100.35 +0.20 / -0.25 mm (3.951 +0.008 / -0.010 in)
Weight 115 g (0.254 lb)
Power-on to ready (sec typical) 3.6 4.0
Standby to ready (sec typical) 2.5 3.0
Track-to-track seek time, read (ms typ) 1.5
Average seek, read (ms typical) 11.0
Average seek, write (ms typical) 13.0
Startup current, +5V (max) 1.0A
Seek power (typical) 1.9W 2.5W
Read power (typical) 1.6W 2.1W
2
max) 541
ST9750423ASG
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
ST9640423AS
ST9640423ASG
ST9750422AS
ST9750420AS
ST9750420ASG
ST9500424AS
ST9500423AS
ST9500423ASG
4 Momentus Product Manual, Rev. B
Table 1: Drive specifications for 750, 640 and 500 GB models
ST9640424AS
ST9750423AS
Drive specification
Write power (typical) 1.85W 2.4W
Idle mode, low power (typical) 0.55W 0.70W
Standby mode (typical) 0.15W ***
Sleep mode (typical) 0.15W ***
Voltage tolerance (including noise) +5V ± 5%
Ambient temperature 0°C to 60°C (operating)
Temperature gradient (°C/hour max) 20°C (operating), 35°C (nonoperating)
Relative humidity 5% to 95% (operating and nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature (°C max) 37.7 °C (operating), 40 °C (nonoperating)
Altitude, operating –304.8 m to 3,048 m (–1,000 ft to 10,000
Altitude, nonoperating
(meters below mean sea level, max)
Shock, operating (Gs max at 2 ms) 350
Shock, nonoperating (Gs max at 2 ms) 800
Shock, nonoperating (Gs max at 1 msec) 1000
Shock, nonoperating (Gs max at 0.5 ms) 1000
Vibration, operating 2.0 G (0 to peak, 5–200 Hz)
Vibration, nonoperating 5 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels)
Idle** 2.3 (typical)
Performance seek 2.6 (typical)
Nonrecoverable read errors 1 per 10
Annualized Failure Rate (AFR) 0.5%
Load/Unload (U/UL) cycles
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 10% relative humidity
55°C, 16% relative humidity
Warranty To 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
*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 incr ease 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.
ST9750423ASG
–40°C to 70°C (nonoperating)
–304.8 m to 12,192 m (–1000 ft to 40,000
1.0 G (0 to peak, 200–500 Hz)
2.5 (max)
2.7 (max)
14
bits read
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
web page: http://www.seagate.com/www/en-us/support/warranty_&_returns_assistance
From this page, click on the “Verify Your Warranty” link. Y ou 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.
Yes (requires COMRESET from host after a hotplug event)
ST9640423AS
ST9640423ASG
ST9750422AS
ST9750420AS
ST9750420ASG
+ ft)
+ ft)
ST9500424AS
ST9500423AS
ST9500423ASG
Momentus Product Manual, Rev. B 5
3.2 Formatted capacity
Model Forma tte d capacity* Guara nteed sectors
ST9750423AS, ST9750423ASG,
ST9750422AS, ST9750420AS and
ST9750420ASG
9640423ASG
ST
ST9500424AS, ST9500423AS and
9500423ASG
ST
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
750GB 1,465,149,168
640GB 1,250,263,728
500GB 976,773,168
Bytes per sector
ical)
(log
512 ST9640424AS, ST9640423AS and
3.2.1 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 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.
3.3 Default logical geometry
Cylinders Read/write heads Sectors per track
16,383 16 63
LBA mode
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,
where n is the number of guaranteed sectors as defined above.
3.4 Physical organization
Drive model Read/write heads Number of discs
ST9750423AS, ST9750423ASG, ST9750422AS,
ST9750420AS and ST9750420ASG
ST9640424AS, ST9640423AS and ST9640423ASG
ST9500424AS, ST9500423AS and ST9500423ASG 4/3
4
2
6 Momentus Product Manual, Rev. B
3.5 Recording and interface technology
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density BPI (bits/in max) 1,586k
Track density TPI (tracks/in max) 341k
Areal density (Gb/in2 max) 541
Spindle speed (RPM) (± 0.2%)
(ST9750423AS, ST9750423ASG, ST9640424AS, ST9640423AS
d ST9640423ASG models only)
an
Spindle speed (RPM) (± 0.2%) (all other models) 7200
Maximum Internal transfer rate (Gb/s)
(ST9750423AS and ST9750423ASG models)
Maximum Internal transfer rate (Gb/s)
(ST9750422AS, ST9750420AS, ST9750420ASG, ST9500424AS,
ST9500423AS and ST9500423ASG models)
(in)
(in)
te (Gb/s)
9.5 +/-0.2
0.370 +/-0.008
69.85 +/-0.25
2.750 +/-0.010
Maximum Internal transfer ra
(ST9640424AS, ST9640423AS and ST9640423ASG models)
I/O data-transfer rate (Gb/s max) 3.0
Interleave 1:1
Cache buffer 16MB (16,384KB)
3.6 Physical characteristics
Drive specification
Height (mm)
Width (mm)
5400
1130
1305
950
Length (mm)
(in)
Typical weight
all models
100.35 +0.20 / -0.25
3.951 +0.008 / -.010
115 g
0.254 lb
Momentus Product Manual, Rev. B 7
3.7 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
• Average seek time is a true statistical random aver age
random tracks, less overhead.
Table 2: Typical seek times
Typical seek times (ms) Read
Track-to-track 1.5
Average 11.0
possible single-track seeks in both directions.
of at least 5000 measurements of seeks between
Full-stroke (ST9750423AS, ST9750423ASG, ST9640424AS,
ST9640423AS and ST9640423ASG models only)
Full-stroke (all other models) 22.0
Average latency (ST9750423AS, ST9750423ASG, ST9640424AS,
9640423AS and ST9640423ASG models only)
ST
Average latency (all other models) 4.2
27.0
5.6
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.
3.8 Start/stop times
ST9750423AS, ST9750423ASG,
ST9640424AS, ST9640423AS
and ST9640423ASG,
Time to ready T ypical
Power-on to Ready (sec) 3.6 5.1 4.0 5.5
Standby to Ready (sec) 2.5 4.0 3.0 4.5
Max @ 25
°C
ST9750422AS, ST9750420AS,
ST9750420ASG, ST9500424AS,
ST9500423AS and ST9500423ASG
Typical
Max @ 25°C
8 Momentus Product Manual, Rev. B
3.9 Power specifications
The drive receives DC power (+5V) through a native SATA power connector.
3.9.1 Power consumption
Power requirements for the drives are listed in the t ab le on
page 9. T ypi cal powe r measur ements 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 towar
d a specific position on the disc surface and does
not execute a read or write operation. Servo electr on ics a re active . Seek m ode p ower is measur ed based on
three random seek operations every 100 ms. This mode is not typical.
• Read/write
Read/write power is measured with the heads on track, base
power and current
d on three 63 sector read or write operations
every 100 msecs.
• Idle mode power
Idle mode power is measured with the drive up to spee
d, 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
ST9750423AS, ST9750423ASG,
ST9640424AS, ST9640423AS,
and ST9640423ASG,
Power dissipation +5V input average (25° C)
Spinup (max) 1.0A
Seek Average 1.9W 2.5W
Write Average 1.85W 2.4W
Read Average 1.6W 2.1W
Idle, performance* 1.4W 2.0W
Idle, active* 0.80W 0.96W
Idle, low power mode* 0.55W 0.70W
Standby 0.15W
Sleep 0.15W
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increa se acoustic and
power to operational levels.
ST9750422AS, ST9750420AS,
ST9750420ASG, ST9500424AS,
ST9500423AS and ST9500423ASG
Momentus Product Manual, Rev. B 9
3.9.1.1 Typical current profile
Figure 1. Typical +5V only startup and operation current profile (7200-RPM models)
Figure 2. Typical +5V only startup and operation current profile (5400-RPM models)
10 Momentus Product Manual, Rev. B
3.9.2 Conducted noise
Input noise ripple is measured at the host system powe r supply across an equivalent 15-ohm resistive load on
the +5V line.
Using 5V power, the drive is expected to operate with a maximum of 100mV 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.
3.9.3 Voltage tolerance
Voltage tolerance (including noise):
5V ± 5%
Momentus Product Manual, Rev. B 11
3.9.4 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:
Table 4: Power management modes
Power modes Heads Spindle Buffer
Active (operating) Tracking Rotating Full power
Idle, performance Tracking Rotating Self refresh—low power
Idle, active Floating Rotating Self refresh—low power
Idle, low power Parked Rotating Self refresh—low power
Standby Parked Stopped Self refresh—low power
Sleep Parked Stopped Self refresh—low power
• Active mode
The drive is in Active mode during the read/write and seek operations.
• Idle mode
The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disc
access is necessary.
• Standby mode
The drive enters Standby mode when the host sends a Standby Immediate comman d. 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 Stand by
mode, the drive buffer is in Self Refresh Low Power mode, 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 comma nd from the host. In Sleep mode, the drive buffer
is in Self Refresh Low Power mode, 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.
12 Momentus Product Manual, Rev. B
3.10 Environmental specifications
This section provides the temperature, humidity, shock, and vibration specifications for Momentus drives.
3.10.1 Ambient temperature
Ambient temperature is defined as the temperature of th
e environment immediately surrounding the drive.
Above 1000 feet (305 meters), the maximum temperature is dera ted linearly by 1°C every 1000 feet.
Operating: 0°C to 60°C (32°F to 140°F)
No
noperating: –40°C to 70°C (–40°F to 158°F)
3.10.2 Temperature gradient
Operating 20°C per hour (68°F per hour max), without condensation
Nonoperating 35°C per hour (95°F per hour max), without condensation
3.10.3 Relative humidity
Operating 5% to 95% noncondensing (30% per hour max)
Nonoperating 5% to 95% noncondensing (30% per hour max)
3.10.4 Wet bulb temperature
Operating 37.7°C (99.8°F max)
Nonoperating 40°C (104°F max)
3.10.5 Altitude
Operating –304.8 m to 3048 m (–1000 ft to 10,000+ ft)
Nonoperating –304.8 m to 12,192 m (–1000 ft to 40,000+ ft)
Momentus Product Manual, Rev. B 13
3.10.6 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.
Note. Additional shock protection is provided by the Free Fall Protection feature on ST9750423ASG,
ST9750420ASG, ST9640423ASG and ST9500423ASG models. See
Section 3.13.1 for additional
information about this feature.
3.10.6.1 Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum
operating shock of 350 Gs based on h alf -sin e sho ck pu lses of 2ms. Shocks should not be repeated more than
one time per axis.
3.10.6.2 Nonoperating shock
The nonoperating shock level that the drive can experience without incurring physical damage or degradation
in performance when subsequently put into operation is 80 0 Gs based on a nonrepe titive half-sine sho ck pulse
of 2 ms duration.
The nonoperating shock level that the drive can experience without incurring physical damage or degradation
in performance when subsequently put into operation is 1000 Gs based on a nonrepetitive half-sine shock
pulse of 1 ms duration.
The nonoperating shock level that the drive can experience without incurring physical damage or degradation
in performance when subsequently put into operation is 1000 Gs based on a nonrepetitive half-sine shock
pulse of 0.5 ms duration.
3.10.7 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.
3.10.7.1 Operating vibration
The maximum vibration levels that the drive may experience while meeting the performance standards specified in this document are specified below.
5–200 Hz 2.0 Gs (0 to peak). Max displacement may apply below 10 Hz.
200–500 Hz 1.0 Gs (0 to peak).
3.10.7.2 Nonoperating vibration
The maximum nonoperating vibration levels that the drive may experience with out incurring physical damage or degra dation in performance when subsequently put into operation are specified below
5–500 Hz: 5 Gs (0 to peak). Max displacement may apply below 22 Hz.
.
14 Momentus Product Manual, Rev. B
3.11 Acoustics
Drive emission of sound is measured consistent with the ECMA-74 and its referenced standards. Testing is
conducted at room temperature (approximately 25
sound power levers for steady state, idle, and active seeks modes of operation.
Table 5: Drive A-weighted Sound Power Levels (SWL, BA)
Idle* Performance seek
°C). Emission levels are reported as the total A-weighted
2.3 bels (typ)
2.5 bels (max)
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increa se acoustic and
power to operational levels.
2.6 bels (typ)
2.7 bels (max)
Test for Prominent Discrete Tones (PDTs)
Seagate follows the ECMA-74 standards for measurement and identification of PDTs. An exception to this process is the use of the absolute threshold of hearing. Seagate uses the lower limit for the threshold curve* to
discern tone audibility and to compensate for the inaudible components of sound prior to computation of tone
ratios according to Annex D of the ECMA-74 standards.
*Defined as the median curve given by ISO 389-7 (Tf curve) minus 10dB at all frequencies.
3.12 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 6: Radio frequency environments
Performance
Test Description
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,
80% AM with 1 kHz sine
900 MHz, 3 V/m, 50% pulse modulation @ 200 Hz
level
A EN 61000-4-3: 96
Reference
standard
ENV 50204: 95
Electrical fast transient ± 1 kV on AC mains, ± 0.5 kV on external I/O B EN 61000-4-4: 95
Surge immunity ± 1 kV differential, ± 2 kV common, AC mains B EN 61000-4-5: 95
Conducted RF immunity 150 kHz to 80 MHz, 3 Vrms, 80% AM with 1 kHz
Power Frequency H-field
immunity
Voltage dips, interrupts 30% Reduction for 25 cycles
sine
1 A/m, 50Hz/60Hz, 3 axes A EN 61000-4-8: 97
>95% Reduction for 250 cycles
>95%, 0.5 cycles
A EN 61000-4-6: 97
C
C
B
EN 61000-4-11: 94
Momentus Product Manual, Rev. B 15
3.13 Reliability
Measurement type Specification
Nonrecoverable read errors 1 per 1014 bits read, max.
Annualized Failure Rate (AFR) 0.5%
Load/Unload (U/UL)
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 10% relative humidity
55°C, 16% relative humidity
Warranty To determine the warranty for a specific drive, use a web bro
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
600,000 software-controlled power on/off cycles
50,000 hard power on/off cycles
following web page:
http://www.seagate.com/www/en-us/support/warranty_&_re
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.
wser to access the
turns_assistance
3.13.1 Free Fall Protection feature
The Free Fall Protection feature provides enhanced data protection against shock events that may occur whil e
the
drive is operating. This feature is designed to decrease the likelihood of data loss by detecting a free fall
event and unloading the ac tuator before a shock takes place in falls of >8 inch es (nominal). T he drive uses a
0G sensor mounted on the printed circuit board assembly (PCBA) to sense this event.
To enable the Free Fall Protection feature on ST9750423ASG, ST9750420ASG, ST9640423ASG and
ST9500423ASG models, use Set Features command 41h. To disable this feature, use Set Features command
C1h.
Information about Free Fall Events that have occurred is available through SMART Attribute FEh.
Note.
The Free Fall Protection feature is provided only on ST9750423ASG, ST9750420ASG, ST9640423ASG
and ST9500423ASG models.
3.14 Agency certification
3.14.1 Safety certification
The drives are recognized in accordance with UL 60950-1 and CSA C22.2 (950) and meet all applicable section
s of IEC 60950-1 and EN60950-1 as tested by TUV North America.
3.14.2 Electromagnetic compatibility
Hard drives that display the CE mark comply with the European Union (EU) requirement
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 define d by EN 5 5022, Cla ss B and
the immunity levels are defined by EN 55024.
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.
s specified in the Elec-
16 Momentus Product Manual, Rev. B
Korean RRL
If these drives have the Korean Communications Commission (KCC) logo, they comply with paragraph 1 of
Article 11 of the Electromagnetic Compatibility control Regulation and meet the Electromagnetic Compatibility
(EMC) Framework requirements of the Radio Research Laboratory (RRL) Communications Commission,
Republic of Korea.
These drives have been tested and comply with the Electromagnetic Interference/Electromagnetic
Susceptibility (EMI/EMS) for Class B products. Drives are tested in a representative, end-user system by a
Korean-recognized lab.
• Certificate number: STX-Momentus (B)
• Trade name or applicant: Seagate Technology International (Wuxi) Co., Ltd.
• Date of certificate: May 25, 2009
• Manufacturer/nationality: Seagate Technology (Suzhou) Co., Ltd.
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 Communication Authority (ACA).
3.14.3 FCC verification
These drives are intended to be contained solely within a pe rson al computer or simila r enclosur e (no t attached
as an external device). As such, each drive is considered to be a subassembly even when it is individually marketed to the customer. As a subassembly, no Federal Communications Commission verification or certification
of the device is required.
Seagate Technology LLC has tested this device in enclosures as described above to ensure that the total
assembly (enclosure, disc drive, m otherboard, 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 w ith 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 installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment
does cause interference to radio or television, which can be determined by turning the equipment on and off,
you are encouraged to try one or more of the following corrective measures:
• Reorient the receiving antenna.
• Move the device to one side or the other of the radio or TV.
• Move the device farther away from the radio or TV.
• Plug the computer into a different outlet so that the receiver and computer are on different branch outlets.
If necessary, you should consult your dealer or an experienced radio/television technician for additional 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 Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. Refer to publication number 004-000-00345-4.
Momentus Product Manual, Rev. B 17
3.15 Environmental protection
“O”
RoHS MCV
“X”
RoHS MCV
Seagate designs its products to meet environmental protection requirements worldwide, including regulations
restricting certain chemical substances.
3.15.1 European Union Restriction of Hazardous Substances (RoHS)
Seagate designs its products to meet environmental protection
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.
3.15.2 China Restriction of Hazardous Substances (RoHS) Directive
This product has an Environmental Protection Use Period (EPUP) of 20 years. The following
table contains information mandated by China's "Marking Requirements for Control of Pollution
Caused by Electronic Information Products" Standard.
requirements worldwide, including regulations
"O" indicates the hazardous and toxic substa nce content of the p art (at the homogenou s material level) is lower
than the threshold defined by the China RoHS MCV Standard.
表示该部件（于同类物品程度上）所含的危险和有毒物质低于中国
"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.
表示该部件（于同类物品程度上）所含的危险和有毒物质超出中国
标准所定义的门槛值。
标准所定义的门槛值。
3.16 Corrosive environment
Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to
light industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM
B845. However, this accelerated testing cannot duplicate every potential application environment.
Users should use caution exposin g any electronic c omponents to uncontrolled chemical pollutants and corrosive chemicals as electronic drive component reliability can be affected by the installation environment. The silver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide,
chloride, and nitrate contaminants. Sulfur is found to be th e most damaging . In additio n, electronic component s
should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or
exposed to an ambient relative humidity greater than 95%. Materials used in cabinet fabrication , such as vulcanized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any
electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.
18 Momentus Product Manual, Rev. B
4.0 Configuring and mounting the drive
This section contains the specifications and instructions for configuring and mounting the drive.
4.1 Handling and static-discharge precautions
After unpacking, and before installation, the drive may be exposed to potential handling and electrostatic discharge (ESD) hazards. Observe the following standard handling and static-discharge precautions:
Caution:
• Keep the drive in the electrostatic discharge (ESD) bag until you are ready for installation to limit the drive’s
exposure to ESD.
• Before handling the drive, put on a gr ou nd e d wrist strap, or ground yourself frequently by touching the metal
chassis of a computer that is plugged into a grounded outlet. Wea r a grounded wrist strap throughout the entire
installation procedure.
• Handle the drive only by its edges or frame.
• The drive is 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.
Momentus Product Manual, Rev. B 19
4.2 Configuring the drive
Jumper block
SATA interface connector
SATA power connector
Limit data transfer rate to
1.5 Gbits per second
3.0 Gbits per second operation
Power cable
SATA interface cable
SATA interface connector
Power connector
Each drive on the Serial ATA interface connects in a point-to-point configuration with the Serial ATA host
adapter. There is no master/slave relationship because each drive is considered a master in a point-to-point
relationships. 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 means bo th drive s behave as if they are
Device 0 (master) devices.
Serial ATA dr ives are designed for easy in st allation with no jumpers, terminators, or o ther settings. It is not necessary to set any jumpers on this drive for proper operation. The jumper block adjacent to the signal connector
is for factory use only.
Figure 3. Serial ATA connectors
4.3 Serial ATA cables and connectors
The Serial ATA interface cable consists of four conductors in two differential pairs, plus three ground connections. The cable size may be 30 to 26 AWG with a maximum length of one meter (39.37 inches). See Table 7
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.
For installations which require cables, you can connect the drive as illustrated in Figure 4.
Figure 4. Attaching SATA cabling
Each cable is keyed to ensure correct orientation.
20 Momentus Product Manual, Rev. B
4.4 Drive mounting
You can mount the drive using four screws in the side-mounting holes or four screws in the bottom-mounting
holes. See Figure 5 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 M3 UNC mounting screws.
• Do not overtighten the mounting screws (maximum torque: 4.0 inch-lb).
• Four (4) threads (0.080 inches) minimum screw engagement recommended .
Measurements shown in Figure 5 are in inche s.
Figure 5. Mounting dimensions—top, side and end v ie w
Momentus Product Manual, Rev. B 21
5.0 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. The drive
also supports the use of the IORDY signal to provide reliable high-speed data transfers.
For detailed information about the Serial ATA interface, refer to the “Serial ATA: High Speed Serialized AT
Attachment” specification.
5.1 Hot-Plug compatibility
Momentus drives incorporate connectors which enable you to hot plug these drives in accordance with the
Serial ATA: High Speed Serialized AT Attachment specification re vision 2.0. This specification can be downloaded from http://www.serialata.org. This device requires a COMRESET from the host after a hotplug event.
22 Momentus Product Manual, Rev. B
5.2 Serial ATA device plug connector pin definitions
Table 7 summarizes the signals on the Serial ATA interface and power connectors.
Table 7: Serial ATA connector pin definitions
Segment Pin Function Definition
S1 Ground 2nd mate
S2 A+ Differential signal pair A from Phy
S3 AS4 Ground 2nd mate
S5 B- Differential signal pair B from Phy
S6 B+
Signal
Power
S7 Ground 2nd mate
Key and spacing separate signal and power segments
P1 V
P2 V
P3 V
33
33
33
3.3V power
3.3V power
3.3V power, pre-charge, 2nd mate
P4 Ground 1st mate
P5 Ground 2nd mate
P6 Ground 2nd mate
P7 V
P8 V
P9 V
5
5
5
5V power, pre-charge, 2nd mate
5V power
5V power
P10 Ground 2nd mate
P11 Reserved The pin corresponding to P11 in the backplane receptacle connector is also reserved
The corresponding pin to be mated with P11 in the power cable receptacle connector
shall always be grounded
P12 Ground 1st mate.
P13 NC Not connected
P14 NC Not connected
P15 NC Not connected
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.
Momentus Product Manual, Rev. B 23
5.3 Supported ATA commands
The following table lists Serial ATA standard commands that the drive supports. For a detailed description of
the ATA commands, refer to the Serial ATA: High Speed Serialized AT Attachment specification. See
“S.M.A.R.T. commands” on page 31.for details and subcommands used in the S.M. A.R .T. implementation.
Command name Command code (in hex)
ATA-standard commands
Device Configuration Restore B1h/C0h
Device Configuration Freeze Lock B1h/C1h
Device Configuration Identify B1h/C2h
Device Configuration Set B1h/C3h
Download Microcode 92h
Execute Device Diagnostics 90h
Flush Cache E7h
Flush Cache Extended EAh
Identify Device ECh
Initialize Device Parameters 91h
Read Buffer E4h
Read DMA C8h
Read DMA Extended 25h
Read DMA without Retries C9h
Read Long with Retries 22h
Read Long without Retries 23h
Read Multiple C4h
Read Multiple Extended 29h
Read Native Max Address F8h
Read Native Max Address Extended 27h
Read Sectors 20h
Read Sectors Extended 24h
Read Sectors without Retries 21h
Read Verify Sectors 40h
Read Verify Sectors Extended 42h
Read Verify Sectors without Retries 41h
Seek 70h
Set Features EFh
Set Max Address F9h
Note: Individual Set Max commands are identi-
fied by the value placed in the Set Max Features register as defined to the right.
Set Multiple Mode C6h
S.M.A.R.T. Disable Operations B0h/D9h
Address:
Password:
Lock:
Unlock:
Freeze Lock:
00
01
02
03
04
H
H
H
H
H
24 Momentus Product Manual, Rev. B
Command name Command code (in hex)
S.M.A.R.T. Enable/Disable Autosave B0h/D2h
S.M.A.R.T. Enable Operations B0h/D8h
S.M.A.R.T. Enable/Disable Auto Offline B0h/DBh
S.M.A.R.T. Enable One Attribute Modification B0h/E0h
S.M.A.R.T. Execute Offline B0h/D4h
S.M.A.R.T. Free Fall Protection Host Interface FEh
S.M.A.R.T. Read Attribute Thresholds B0h/D1h
S.M.A.R.T. Read Data B0h/D0h
S.M.A.R.T. Read Log Sector B0h/D5h
S.M.A.R.T. Return Status B0h/DAh
S.M.A.R.T. Save Attribute Values B0h/D3h
S.M.A.R.T. Write Attribute Thresholds B0h/D7h
S.M.A.R.T. Write Attribute Values B0h/E1h
S.M.A.R.T. Write Log Sector B0h/D6h
Write Buffer E8h
Write DMA CAh
Write DMA Extended 35h
Write DMA without Retries CBh
Write Long with Retries 32h
Write Long without Retries 33h
Write Multiple C5h
Write Multiple Extended 39h
Write Sectors 30h
,
31h
Write Sectors Extended 34h
ATA-standard power-management commands
Check Power Mode E5h
Idle E3h
Idle Immediate E1h
Sleep E6h
Standby E2h
Standby Immediate E0h
ATA-standard security commands
Security Set Password F1h
Security Unlock F2h
Security Erase Prepare F3h
Security Erase Unit F4h
Security Freeze Lock F5h
Security Disable Password F6h
Momentus Product Manual, Rev. B 25
5.3.1 Identify Device command
The Identify Device command (command code ECH) transfers information about the drive to the host following
power up. The data is organized as a single 512-byte block of data, whose contents are shown in the table on
page 27. All reserved bits or words should be set to zero. Parameters listed with an “x” are drive-specific or
vary with the state of the drive. See Section 3.0 on page 4 for default parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
Word Description Value
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
0C5A
• Bit 6: removable controller
• Bit 0: reserved
1 Numbe r of logical cylind ers 16,383
2 Specific configuration C837
3 Number of logical heads 16
4 Retired 0000
5 Retired 0000
6 Number of logical sectors per logical track: 63 003F
7–9 Retired 0000
10–19 Serial number: (20 ASCII characters, 0000H = none) ASCII
20 Retired 8000
21 Retired 0004
22 Obsolete 0000
23–26 Firmware revision (8 ASCII character string, padded with
x.xx
blanks to end of string)
27–46 Drive model number: (40 ASCII characters, padded with
blanks to end of string)
ST9750423AS
ST9750423ASG
ST9750422AS
ST9750420AS
ST9750420ASG
ST9640424AS
ST9640423AS
ST9640423ASG
ST9500424AS
ST9500423AS
ST9500423ASG
H
H
H
H
H
H
H
H
H
47 (Bits 7–0) Maximum sectors per interrupt on Read multiple
and Write multiple (16)
48 Reserved 0000
49 Standard Standby timer, IORDY supported and may be dis-
abled
50 Capabilities 4000
51 PIO data-transfer cycle timing mode 0200
52 Retired 0200
53 Words 54–58, 64–70 and 88 are valid 0007
8010
2F00
H
H
H
H
H
H
H
26 Momentus Product Manual, Rev. B
Word Description Value
54 Number of current logical cylinders xxxx
55 Number of current logical heads xxxx
56 Number of current logical sectors per logical track xxxx
57–58 Current capacity in sectors xxxx
59 Number of sectors transferred during a Read Multiple or
xxxx
Write Multiple command
60–61 Total number of user-addressable sectors
This field contains a value that is one greater than the total
number of user-addressable sectors. The maximum value
that shall be placed in this field is 0FFFFFFFh. The
0FFFFFFFh value applies to all capacities over 137Gbytes
(see Section 3.2 and 3.3 for related information).
ST9750423AS = 0FFFFFFFh
ST9750423ASG = 0FFFFFFFh
ST9750422AS = 0FFFFFFFh
ST9750420AS = 0FFFFFFFh
ST9750420ASG = 0FFFFFFFh
ST9640424AS = 0FFFFFFFh
ST9640423AS = 0FFFFFFFh
ST9640423ASG = 0FFFFFFFh
ST9500424AS = 0FFFFFFFh
ST9500423AS = 0FFFFFFFh
ST9500423ASG = 0FFFFFFFh
62 Retired 0000
63 Multiword DMA active and modes supported
xx07
(see note following this table)
64 Advanced PIO modes supported (modes 3 and 4 supported) 0003
65 Minimum multiword DMA transfer cycle time per word
0078
(120 ns)
H
H
H
H
H
H
H
H
H
66 Recommended multiword DMA transfer cycle time per word
0078
(120 ns)
67 Minimum PIO cycle time without IORDY flow control (240 ns) 0078
68 Minimum PIO cycle time with IORDY flow control (120 nsec) 0078
69–74 ATA-reserved 0000
75 Queue depth 001F
76 Serial ATA capabilities 0506
77 ATA-reserved 0000
78 Serial ATA features supported 0048
79 Serial ATA features enabled 0040
80 Major version number 01F0
81 Minor version number 0029
82 Command sets supported 746B
83 Command sets supported 7D09
84 Command sets support extension 61E3
85 Command sets enabled 7469
86 Command sets enabled BC09
87 Command sets enable extension 61E3
88 Ultra DMA support and current mode
xx7F
(see note following this table)
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
Momentus Product Manual, Rev. B 27
Word Description Value
89 Security erase time 0045
90 Enhanced security erase time 0045
91 Current APM values 8080
92 Master password revision code FFFE
93 Hardware reset value (see description following this table) xxxx
94 Auto acoustic management setting xxxx
95 Stream Min. Request Size 000 0
96 Streaming Transfer Time - DMA 0000
97 Streaming Access Latency - DMA and PIO 0000
98–99 Streaming Performance Granularity 0000
100–103 Total number of user-addressable LBA sectors available
(see Section 3.2 for related information)
These words are required for drives that support the 48-bit
addressing feature. Maximum value: 0000FFFFFFFFFFFFh.
ST9750423AS = 1,465,149,168
ST9750423ASG = 1,465,149,168
ST9750422AS = 1,465,149,168
ST9750420AS = 1,465,149,168
ST9750420ASG = 1,465,149,168
ST9640424AS = 1,250,263,728
ST9640423AS = 1,250,263,728
ST9640423ASG = 1,250,263,728
ST9500424AS = 976,773,168
ST9500423AS = 976,773,168
ST9500423ASG = 976,773,168
104 Streaming Transfer Time - PIO 0000
105 Reserved 0000
106 Physical sector size / Logical sector size 6003
107 Seagate reserved 0000
108–111 The mandatory value of the world wide name (WWN) for the
Each drive will have a unique value.
drive. NOTE: This field is valid if word 84, bit 8 is set to 1
indicating 64-bit WWN support.
H
H
H
H
H
H
H
H
H
H
H
H
H
H
1 12-118 ATA-reserved 0000
H
1 19 Free Fall Protection support (bit 5) 1 = Free Fall Protection supported
0 = Free Fall Protection not supported
120 Free Fall Protection enable/disable (bit 5) 1 = Free Fall Protection feature is enabled
0 = Free Fall Protection feature is disabled
121–127 ATA-reserved 0000
128 Security status 0021
129–159 Seagate-reserved xxxx
160–254 ATA-reserved 0000
255 Integrity word xxA5
H
H
H
H
H
28 Momentus Product Manual, Rev. B
Note. See the bit descriptions below for words 63, 88, 93 and 94 of the Identify Drive data:
Description (if bit is set to 1)
Bit Word 63
0 Multiword DMA mode 0 is supported.
1 Multiword DMA mode 1 is supported.
2 Multiword DMA mode 2 is supported.
8 Multiword DMA mode 0 is currently active.
9 Multiword DMA mode 1 is currently active.
10 Multiword DMA mode 2 is currently active.
Bit Word 88
0 Ultra DMA mode 0 is supported.
1 Ultra DMA mode 1 is supported.
2 Ultra DMA mode 2 is supported.
3 Ultra DMA mode 3 is supported.
4 Ultra DMA mode 4 is supported.
5 Ultra DMA mode 5 is supported
6 Ultra DMA mode 6 is supported
8 Ultra DMA mode 0 is currently active.
9 Ultra DMA mode 1 is currently active.
10 Ultra DMA mode 2 is currently active.
11 Ultra DMA mode 3 is currently active.
12 Ultra DMA mode 4 is currently active.
13 Ultra DMA mode 5 is currently active.
14 Ultra DMA mode 6 is currently active.
Bit Word 93
13 1 = 80-conductor cable detected, CBLID above V
0 = 40-conductor cable detected, CBLID below VIL
IH
Momentus Product Manual, Rev. B 29
5.3.2 Set Features command
This command controls the implementation of various feat ures that the drive support s. When the drive receives
this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an interrupt. If the value in the register does not represent a feature that the drive supports, the command is aborted.
Power-on default has the read look-ahead and write caching features enabled. The acceptable values for the
Features register are defined as follows:
Table 8: Set Features command values
02
03
55
82
AA
F1
Enable write cache (default).
H
Set transfer mode (based on value in Sector Count register).
H
Sector Count register values:
00HSet PIO mode to default (PIO mode 2).
01
Set PIO mode to default and disable IORDY (PIO mode 2).
H
PIO mode 0
08
H
PIO mode 1
09
H
0A
PIO mode 2
H
PIO mode 3
0B
H
PIO mode 4 (default)
0C
H
20
Multiword DMA mode 0
H
Multiword DMA mode 1
21
H
Multiword DMA mode 2
22
H
40
Ultra DMA mode 0
H
Ultra DMA mode 1
41
H
Ultra DMA mode 2
42
H
43
Ultra DMA mode 3
H
Ultra DMA mode 4
44
H
Ultra DMA mode 5
45
H
46
Ultra DMA mode 6
H
Disable read look-ahead (read cache) feature.
H
Disable write cache
H
Enable read look-ahead (read cache) feature (default).
H
Report full capacity available
H
Note. At power-on, or after a hardware or software reset, the default values of the features are as indi -
cated above.
30 Momentus Product Manual, Rev. B
5.3.3 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 monitors predetermined drive attributes that are susceptible to degradation over time. If self-monitoring determines
that a failure is likely, S.M.A.R.T. makes a status report available to the host. Not all failures are predictable.
S.M.A.R.T. predictability is limited to the attributes the drive can monitor. For more information on S.M.A.R.T.
commands and implementation, see the Draft ATA-8 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:
http://seatools.sea
gate.com.
This drive is shipped with S.M.A.R.T. features disabled. You must have a r ecent BIOS or soft ware packag e 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 9: S.M.A.R.T. commands
Code in features register S.M.A.R.T. command
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
DA
H
H
H
H
H
H
H
H
H
H
H
S.M.A.R.T. Read Data
Vendor-specific
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
Vendor-specific
S.M.A.R.T. Enable Operations
S.M.A.R.T. Disable Operations
S.M.A.R.T. Return Status
Note. If an appropriate code is not written to the Features Register, the command is aborted and 0x 04
(abort) is written to the Error register.
Momentus Product Manual, Rev. B 31
32 Momentus Product Manual, Rev. B
Index
A
ACA 17
acoustics 5, 15
Active mode 12
Address 24
AFR 16
Agency certification 16
Altitude 13
Altitude, nonoperating 5
Altitude, operating 5
Ambient temperature 5, 13
ambient temperature 8
Annualized Failure Rate 16
Annualized Failure Rate (AFR) 5
Areal density 4, 7
ATA commands 24
ATA data-transfer modes supported 4
Australia/New Zealand Standard AS/NZS3548 1995
17
Australian Communication Authority (ACA) 17
Australian C-Tick 17
Average seek time 8
Average seek, read 4
B
bels 5
BPI 4
buffer 4, 7
Bytes per sector 6
C
cables and connectors 20
Cache 4
cache 7
capacity 6
CE mark 16
certification 16
Check Power Mode 25
chemical substances 18
China RoHS directive 18
Class B computing device 17
compatibility 16
Conducted noise 11
Conducted RF immunity 15
Configuring the drive 19
connectors 20
CSA C22.2 (950) 16
current 4
cycles 16
Cylinders 6
D
data-transfer rates 2
DC power 9
Default logical geometry 6
density 4
Device Configuration Freeze Lock 24
Device Configuration Restore 24
Device Configuration Set 24
Diagnostics 24
dimensions 21
Discs 4
dissipation 9
Download Microcode 24
E
Electrical fast transient 15
Electromagnetic compatibility 16
Electromagnetic Compatibility (EMC) 17
Electromagnetic Compatibility control Regulation 17
Electromagnetic Compatibility Directive (89/336/EEC)
16
Electromagnetic immunity 15
Electrostatic discharge 15
electrostatic discharge (ESD) 19
EN 55022, Class B 16
EN 55024 16
EN 60950 16
Environmental protection 18
Environmental specifications 13
error-correction algorithms 2
errors 5, 16
ESD 19
EU 16
European Union (EU) requirements 16
European Union Restriction of Hazardous Substanc-
es 18
evice Configuration Identify 24
Execute Device Diagnostics 24
F
FCC verification 17
features 2
Federal Communications Commission 17
Flush Cache 24
Flush Cache Extended 24
Formatted capacity 6
Formatted Gbytes 4
Free Fall Protection feature 16
Freeze Lock 24
G
Gbytes 6
geometry 6
Momentus Product Manual, Rev. B 33
gradient 5
Guaranteed sectors 4, 6
guaranteed sectors 6
H
handling 19
Handling precautions 19
heads 6
Height 4
height 7
humidity 5
I
I/O data-transfer rate 4, 7
Identify 24
Identify Device 24
Identify Device command 26
Idle 9, 25
Idle and Standby timers 12
Idle Immediate 25
Idle mode 5, 12
Idle mode power 9
IEC950 16
Information Technology Equipment (ITE) 16
Initialize Device Parameters 24
Input noise ripple 11
Interface 7
interface 22
Interleave 7
Internal data transfer rate 4
Internal data-transfer rate 7
ITE 16
K
KCC 17
Korean Communications Commission 17
Korean RRL 17
L
latency 4
LBA mode 6
Length 4
length 7
Load/Unload 16
logical geometry 6
M
master/slave 3
Max Address 24
maximum temperature 13
Microcode 24
mounting 21
mounting screws 14
mounting the drive 19
N
noise 11
nominal power 8
Nonoperating shock 14
Nonoperating vibration 14
Nonrecoverable read errors 5
nonrecoverable read errors 16
O
Operating shock 14
Operating vibration 14
P
Physical characteristics 7
Physical organization 6
Physical read/write heads 4
point-to-point 3, 20
Power consumption 9
power dissipation 9
power management 12
power on/off cycles 16
Power specifications 9
Power-management modes 12
Power-on to Ready 8
Power-on to ready 4
precautions 19, 21
programmable power management 12
Q
quick reference 4
R
Radiated RF immunity 15
Radio and television interference 17
radio frequency (RF) 15
random track location 9
Read Buffer 24
Read DMA 24
Read DMA Extended 24
Read DMA without Retries 24
read errors 5, 16
Read Long with Retries 24
Read Long without Retries 24
Read Multiple 24
Read Multiple Extended 24
Read Native Max Address 24
Read Native Max Address Extended 24
Read Sectors 24
Read Sectors Extended 24
Read Sectors without Retries 24
Read Verify Sectors 24
34 Momentus Product Manual, Rev. B
Read Verify Sectors Extended 24
Read Verify Sectors without Retries 24
Read/write heads 6
Read/write power 4
read/write power and current 9
Recording density 4, 7
Recording method 7
Recording technology 7
Relative humidity 5, 13
Reliability 16
resistance 11
Retries 24
RF 15
RoHS 18
RPM 4
RRL 17
S
S.M.A.R.T. 25
S.M.A.R.T. implementation 24
Safety certification 16
SATA 7, 22
screws 14, 21
sector 6
sectors 6
Sectors per track 6
Security Disable Password 25
Security Erase Prepare 25
Security Erase Unit 25
Security Freeze Lock 25
Security Set Password 25
Security Unlock 25
Seek 24
seek mode 9
Seek power 4
Seek time 8
seek time 4
Seeking 9
Self refresh, low power 12
Serial ATA 7
Serial ATA (SATA) interface 22
serial ATA ports 3
servo electronics 9
Set Features 24
Set Max Address 24
Set Multiple Mode 24
Shock 14
Shock, nonoperating 5
Shock, operating 5
single-track seeks 8
Sleep 9, 25
Sleep mode 5, 12
sound power 5
Specification summary table 4
Spindle speed 4, 7
Spinup 9
spinup power 9
Standby 9, 25
Standby Immediate 25
Standby mode 5, 9, 12
Standby to Ready 8
Standby to ready 4
Start/stop times 8
Startup current 4
static-discharge 19
support services 1
Surge immunity 15
T
technical support services 1
temperature 5, 8, 13
Temperature gradient 5, 13
timers 12
TPI 4
Track density 4, 7
Track-to-track seek time 4, 8
TUV North America 16
U
UL 1950 16
V
Vibration 14
Vibration, nonoperating 5
Vibration, operating 5
Voltage dips, interrupts 15
Voltage tolerance 5, 11
W
Warranty 16
Weight 4
weight 7
Wet bulb temperature 5, 13
Width 4
width 7
Write Buffer 25
Write DMA 25
Write DMA Extended 25
Write Long with Retries 25
Write Long without Retries 25
Write Multiple 25
Write Sectors 25
Momentus Product Manual, Rev. B 35
36 Momentus Product Manual, Rev. B
Seagate Technology LLC
920 Disc Drive, Scotts Valley, California 95066-4544, USA
Publication Number: 100627937, Rev. B
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