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Product Manual
DiamondMax 22 Serial ATA
STM31000334AS
STM3320614AS
STM3160813AS
100544218 Rev. A November 2008
|
|
Revision history |
Revision |
Date |
Sheets affected or comments |
Rev. A |
11/04/08 |
Initial release. |
Copyright © 2008 Seagate Technology LLC. All rights reserved. Printed in U.S.A. Publication number: 100544218, Rev. A November 2008
Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate Technology LLC in the United States and/or other countries. DiamondMax, MaxBlast, Maxtor and the Maxtor logo 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.
When referring to hard 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. Seagate reserves the right to change, without notice, product offerings or specifications.
Contents
1.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 About the Serial ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1.1 LBA mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.5 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.6 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.7 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.7.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.7.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.7.3 Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.7.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.8 Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.8.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.8.3 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.8.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.8.5 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.8.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.9 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.9.1 Test for Prominent Discrete Tones (PDTs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.10 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.11 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.11.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF) . . . 17 2.12 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.12.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.12.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.12.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.13 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.13.1 European Union Restriction of Hazardous Substances (RoHS) Directive . . . . . 19 2.13.2 China Restriction of Hazardous Substances (RoHS) Directive . . . . . . . . . . . . . 19
2.14 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 Handling and static-discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.2 Configuring the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.3 Serial ATA cables and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.0 Serial ATA (SATA) interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1 Hot-Plug compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.2 Serial ATA device plug connector pin definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.3 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.3.1 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.3.2 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.3.3 S.M.A.R.T. commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DiamondMax 22 Serial ATA Product Manual, Rev. A |
i |
ii |
DiamondMax 22 Serial ATA Product Manual, Rev. A |
List of Figures
Figure 1. Typical 5V startup and operation current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Figure 2. Typical 12V startup and operation current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Figure 3. Serial ATA connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Figure 4. Attaching SATA cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Figure 5. Mounting dimensions (1000 GB models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 Figure 6. Mounting dimensions (320 and 160 GB models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
DiamondMax 22 Serial ATA Product Manual, Rev. A |
iii |
1.0Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate DiamondMax® 22 Serial ATA model drives:
STM31000334AS
STM3320614AS
STM3160813AS
These drives provide the following key features:
•7,200 RPM spindle speed.
•High instantaneous (burst) data-transfer rates (up to 300 Mbytes per second).
•Perpendicular recording, Tunneling Magnetoresistive (TMR) recording heads and EPRML technology, for increased areal density.
•State-of-the-art cache and on-the-fly error-correction algorithms.
•Native Command Queueing with command ordering to increase performance in demanding applications.
•Full-track multiple-sector transfer capability without local processor intervention.
•Quiet operation.
•SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
•Support for S.M.A.R.T. drive monitoring and reporting.
•Supports latching SATA cables and connectors.
•Worldwide Name (WWN) capability uniquely identifies the drive.
DiamondMax 22 Serial ATA Product Manual, Rev. A |
1 |
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 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 International Organization: Serial ATA Revision 2.6”. The specification can be downloaded from www.sata-io.org.
2 |
DiamondMax 22 Serial ATA Product Manual, Rev. A |
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 following drive models:
STM31000334AS
STM3320614AS
STM3160813AS
Specification summary tables
The specifications listed in the following tables are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual.
DiamondMax 22 Serial ATA Product Manual, Rev. A |
3 |
Table 1: |
Drive specifications summary for 1000 Gbyte models |
|
|
|
|
Drive specification |
STM31000334AS |
|
|
|
|
Formatted capacity (512 bytes/sector)* |
1000 Gbytes |
|
|
|
|
Guaranteed sectors |
1,953,525,168 |
|
|
|
|
Heads |
|
6 |
|
|
|
Discs |
|
3 |
|
|
|
Bytes per sector |
512 |
|
|
|
|
Default sectors per track |
63 |
|
|
|
|
Default read/write heads |
16 |
|
|
|
|
Default cylinders |
16,383 |
|
|
|
|
Recording density |
1300kbits/in max |
|
|
|
|
Track density |
|
182 ktracks/in avg |
|
|
|
Areal density |
|
228 Gbits/in2 avg |
Spindle speed |
|
7,200 RPM |
|
|
|
Internal data transfer rate |
1520 Mbits/sec max |
|
|
|
|
Sustained data transfer rate OD |
120 Mbytes/sec max |
|
|
|
|
I/O data-transfer rate |
300 Mbytes/sec max |
|
|
|
|
ATA data-transfer modes supported |
PIO modes 0–4 |
|
|
|
Multiword DMA modes 0–2 |
|
|
Ultra DMA modes 0–6 |
|
|
|
Cache buffer |
|
32 Mbytes |
|
|
|
Height (max) |
|
26.1 mm (1.028 inches) |
|
|
|
Width (max) |
|
101.6 mm (4.000 inches) +/- 0.010 inches |
|
|
|
Length (max) |
|
146.99 mm (5.787 inches) |
|
|
|
Weight (typical) |
630 grams (1.389 lb.) |
|
|
|
|
Average latency |
4.16 msec |
|
|
|
|
Power-on to ready |
20 sec max |
|
|
|
|
Standby to ready |
15 sec max |
|
|
|
|
Track-to-track seek time |
<0.8 msec typical read; |
|
|
|
<1.0 msec typical write |
|
|
|
Average seek, read |
<8.5 msec typical |
|
|
|
|
Average seek, write |
<10.0 msec typical |
|
|
|
|
Startup current (typical) 12V (peak) |
2.8 amps |
|
|
|
|
Voltage tolerance (including noise) |
5V +10% / -7.5% |
|
|
|
12V +10% / -7.5% |
Ambient temperature |
0° to 60°C per hour max (operating) |
|
|
|
–40° to 70°C per hour max (nonoperating) |
|
|
|
Temperature gradient |
20°C per hour max (operating) |
|
|
|
30°C per hour max (nonoperating) |
|
|
|
Relative humidity |
5% to 95% (operating) |
|
|
|
5% to 95% (nonoperating) |
Relative humidity gradient |
30% per hour max |
|
|
|
|
Wet bulb temperature |
37.7°C max (operating) |
|
|
|
40.0°C max (nonoperating) |
|
|
|
Altitude, operating |
–60.96 m to 3,048 m |
|
|
|
(–200 ft. to 10,000+ ft.) |
Altitude, nonoperating |
–60.96 m to 12,192 m |
|
(below mean sea level, max) |
(–200 ft. to 40,000+ ft.) |
|
|
|
|
Operational Shock |
70 Gs max at 2 msec |
|
|
|
|
Non-Operational Shock |
300 Gs max at 2 msec |
|
|
|
|
4 |
DiamondMax 22 Serial ATA Product Manual, Rev. A |
Drive specification |
STM31000334AS |
Vibration, operating |
2–22 Hz: 0.25 Gs, Limited displacement |
|
22–350 Hz: 0.50 Gs |
|
350–500 Hz:: 0.25 Gs |
|
|
Vibration, nonoperating |
5–22 Hz: 2.0 Gs |
|
22–350 Hz: 5.0 Gs |
|
350–500 Hz:: 2.0 Gs |
|
|
Drive acoustics, sound power |
|
Idle** |
2.5 bels (typical) |
|
2.7 bels (max) |
Performance Seek |
2.9 bels (typical) |
Quiet Seek |
3.1 bels (max) |
|
|
Nonrecoverable read errors |
1 per 1014 bits read |
Annualized Failure Rate (AFR) |
0.34% |
|
|
Warranty |
To determine the warranty for a specific drive, use a web browser to access the following |
|
web page: support.seagate.com/customer/warranty_validation.jsp |
Contact start-stop cycles |
50,000 at 25°C, 50% rel. humidity |
|
|
Supports Hotplug operation per the |
Yes |
Serial ATA Revision 2.5 specification |
|
|
|
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.
**During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.
DiamondMax 22 Serial ATA Product Manual, Rev. A |
5 |
Table 2: |
Drive specifications summary for 320 and 160 Gbyte models |
||
|
|
|
|
Drive specification |
STM3320614AS |
STM3160813AS |
|
|
|
|
|
Formatted capacity (512 bytes/sector)* |
320 Gbytes |
160 Gbytes |
|
|
|
|
|
Guaranteed sectors |
625,142,448 |
312,581,808 |
|
|
|
|
|
Heads |
|
2 |
1 |
|
|
|
|
Discs |
|
1 |
|
|
|
|
|
Bytes per sector |
512 |
|
|
|
|
|
|
Default sectors per track |
63 |
|
|
|
|
|
|
Default read/write heads |
16 |
|
|
|
|
|
|
Default cylinders |
16,383 |
|
|
|
|
|
|
Recording density |
1250 kbits/in max |
|
|
|
|
|
|
Track density |
|
182 ktracks/in avg |
|
|
|
|
|
Areal density |
|
219 Gbits/in2 avg |
|
Spindle speed |
|
7,200 RPM |
|
|
|
|
|
Internal data transfer rate |
1460 Mbits/sec max |
|
|
|
|
|
|
Sustained data transfer rate OD |
115 Mbytes/sec max |
|
|
|
|
|
|
I/O data-transfer rate |
300 Mbytes/sec max |
|
|
|
|
|
|
ATA data-transfer modes supported |
PIO modes 0–4 |
|
|
|
|
Multiword DMA modes 0–2 |
|
|
|
Ultra DMA modes 0–6 |
|
|
|
|
|
Cache buffer |
|
16 Mbytes |
8 Mbytes |
|
|
|
|
Height (max) |
|
20.17 mm (0.794 inches) |
|
|
|
|
|
Width (max) |
|
101.6 mm (4.000 inches) +/- 0.010 inches |
|
|
|
|
|
Length (max) |
|
146.99 mm (5.787 inches) |
|
|
|
|
|
Weight (typical) |
405 grams ( 0.893 lb.) |
390 grams ( 0.860 lb.) |
|
|
|
|
|
Average latency |
4.16 msec |
|
|
|
|
|
|
Power-on to ready |
9 sec max |
|
|
|
|
|
|
Standby to ready |
9 sec max |
|
|
|
|
|
|
Track-to-track seek time |
<0.8 msec typical read; |
|
|
|
|
<1.0 msec typical write |
|
|
|
|
|
Average seek, read |
<11.0 msec typical |
|
|
|
|
|
|
Average seek, write |
<12.0 msec typical |
|
|
|
|
|
|
Startup current (typical) 12V (peak) |
2.0 amps |
|
|
|
|
|
|
Voltage tolerance (including noise) |
5V +/- 5% |
|
|
|
|
12V +/-10% |
|
Ambient temperature |
0° to 60°C (operating) |
|
|
|
|
–40° to 70°C (nonoperating) |
|
|
|
|
|
Temperature gradient |
20°C per hour max (operating) |
|
|
|
|
30°C per hour max (nonoperating) |
|
|
|
|
|
Relative humidity |
5% to 95% (operating) |
|
|
|
|
5% to 95% (nonoperating) |
|
Relative humidity gradient |
30% per hour max |
|
|
|
|
|
|
Wet bulb temperature |
37.7°C max (operating) |
|
|
|
|
40.0°C max (nonoperating) |
|
|
|
|
|
Altitude, operating |
–60.96 m to 3,048 m |
|
|
|
|
(–200 ft. to 10,000+ ft.) |
|
Altitude, nonoperating |
–60.96 m to 12,192 m |
|
|
(below mean sea level, max) |
(–200 ft. to 40,000+ ft.) |
|
|
|
|
|
|
Operational Shock |
70 Gs max at 2 msec |
|
|
|
|
|
|
Non-Operational Shock |
350 Gs max at 2 msec |
|
|
|
|
|
|
6 |
DiamondMax 22 Serial ATA Product Manual, Rev. A |
Drive specification |
STM3320614AS |
STM3160813AS |
Vibration, operating |
2–22 Hz: 0.25 Gs, Limited displacement |
|
|
22–350 Hz: 0.50 Gs |
|
|
350–500 Hz:: 0.25 Gs |
|
|
|
|
Vibration, nonoperating |
5–22 Hz: 2.0 Gs |
|
|
22–350 Hz: 5.0 Gs |
|
|
350–500 Hz:: 2.0 Gs |
|
|
|
|
Drive acoustics, sound power |
|
|
Idle** |
2.3 bels (typical) |
|
|
2.5 bels (max) |
|
Performance and Quiet Seek |
2.6 bels (typical) |
|
|
2.8 bels (max) |
|
|
|
|
Nonrecoverable read errors |
1 per 1014 bits read |
|
Annualized Failure Rate (AFR) |
0.34% |
|
|
|
|
Warranty |
To determine the warranty for a specific drive, use a web browser to access the following |
|
|
web page: support.seagate.com/customer/warranty_validation.jsp |
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Contact start-stop cycles |
50,000 at 25°C, 50% rel. humidity |
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Supports Hotplug operation per the |
Yes |
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Serial ATA Revision 2.5 specification |
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*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.
DiamondMax 22 Serial ATA Product Manual, Rev. A |
7 |
2.1Formatted capacity
Model |
Formatted |
Guaranteed |
Bytes per sector |
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capacity* |
sectors |
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STM31000334AS |
1000 Gbytes |
1,953,525,168 |
512 |
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STM3320614AS |
320 Gbytes |
625,142,448 |
512 |
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STM3160813AS |
160 Gbytes |
312,581,808 |
512 |
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*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.
2.1.1LBA 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 48bit addressing support of drives with capacities over 137 Gbytes.
2.2Default logical geometry
Cylinders |
Read/write heads |
Sectors per track |
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16,383 |
16 |
63 |
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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.
2.3Recording and interface technology
|
1000 GB Model |
320 and 160 GB Models |
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Interface |
Serial ATA (SATA) |
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Recording method |
Perpendicular |
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Recording density (kbits/inch max) |
1300 |
1250 |
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Track density (ktracks/inch avg) |
182 |
182 |
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Areal density (Gbits/inch2 avg) |
228 |
219 |
Spindle speed (RPM) |
7,200 ± 0.2% |
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Internal data transfer rate (Mbits/sec max) |
1520 |
1460 |
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Sustained data transfer rate (Mbytes/sec max) |
120 |
115 |
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I/O data-transfer rate (Mbytes/sec max) |
300 |
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8 |
DiamondMax 22 Serial ATA Product Manual, Rev. A |
2.4Physical characteristics
Maximum height (1000 GB models) |
26.1 mm (1.028 inches) |
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Maximum height (320-160 GB models) |
20.17 mm (0.794 inches) |
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Maximum width |
101.6 mm (4.000 +/- 0.010 inches) |
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Maximum length |
146.99 mm (5.787 inches) |
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Typical weight |
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1000 GB models |
630 grams (1.389 lbs) |
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320 GB models |
405 grams (0.893 lbs) |
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160 GB models |
390 grams (0.860 lbs) |
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Cache buffer |
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STM31000334AS |
32 |
Mbytes (32,768 kbytes) |
STM3320614AS |
16 |
Mbytes (16,384 kbytes) |
STM3160813AS |
8 |
Mbytes (8,192 kbytes) |
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2.5Seek time
Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows:
•Track-to-track seek time is an average of all possible single-track seeks in both directions.
•Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead.
Typical seek times (msec) |
Read |
Write |
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Track-to-track (1000, 320 and 160 GB models) |
<0.8 |
<1.0 |
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Average (1000 GB model) |
<8.5 |
<10.0 |
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Average (320 and 160 GB models) |
<11.0 |
<12.0 |
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Average latency: |
4.16 |
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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.
DiamondMax 22 Serial ATA Product Manual, Rev. A |
9 |
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