Seagate Momentus 5400.3 ST9100828AB User manual

Product Manual
Momentus®5400.3
Blade Server
100409994
Rev. B
August 2007
ST9160821AB
ST9120822AB
ST9100828AB
ST980815AB
ST960815AB
ST9402116AB

©2004-2007, Seagate Technology LLC All rights reserved.
Publication number: 100409994, Rev. B
August 2007
Seagate, Seagate Technology and the Wave logo are registered trademarks of Seagate
Technology LLC in the United States and/or other countries. Momentus, Seagate-
SeaBOARD, SeaFONE, SeaTDD, and SeaTools are either trademarks or registered trade-
marks 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.
One gigabyte, or GB, equals one billion bytes and one terabyte, or TB, equals one trillion
bytes when referring to hard drive capacity. Accessible capacity may vary depending on
operating environment and formatting. Quantitative usage examples for various applications
are for illustrative purposes. Actual quantities will vary based on various factors, including file
size, file format, features and application software. Seagate reserves the right to change,
without notice, product offerings or specifications.

Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
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Contents
1.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Specification summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.7 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.8 Time to ready. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.9 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.9.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.9.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.9.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.10 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.10.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.10.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.10.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.10.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.10.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.10.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.11 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.12 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.13 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.14 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.14.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.14.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.14.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.15 Environmental protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.15.1 European Union Restriction of Hazardous Substances (RoHS) . . . . . . . . . . . . 19
2.16 Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1 Handling and static discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2 Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2.1 Master/slave configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2.2 Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1 ATA interface signals and connector pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1.1 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1.2 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.1.3 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

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List of Figures
Figure 1. Typical 5V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 2. Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 3. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B

Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
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1.0 Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate®
Momentus®5400.3 drives:
• ST9160821AB
• ST9120822AB
• ST9100828AB
• ST980815AB
• ST960815AB
• ST9402116AB
These drives provide the following key features:
• 5,400-RPM spindle speed
• 8-Mbyte buffer
• Quiet operation. Fluid Dynamic Bearing (FDB) motor.
• High instantaneous (burst) data transfer rates (up to 100 Mbytes per second) using Ultra DMA mode 5.
• Tunneling Magnetoresistive (TMR) recording heads.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Full-track multiple-sector transfer capability without local processor intervention.
• 900 Gs nonoperating shock and 350 Gs operating shock.
• SeaTools™ diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• The 3D Defense System™, which includes Drive Defense, Data Defense, and Diagnostic Defense, offers the
industry’s most comprehensive protection for disc drives.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Support for Read Multiple and Write Multiple commands.
• Support for autodetection of master/slave drives using cable select (CSEL).

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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B

Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
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2.0 Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate
ST9160821AB, ST9120822AB, ST9100828AB, ST980815AB, ST960815AB, and ST9402116AB model drives.
2.1 Specification summary
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: Specifications for 160 and 120 Gbyte models
Drive specification ST9160821AB ST9120822AB
Formatted Gbytes (512 bytes/sector)* 160 120
Guaranteed sectors 312,581,808 234,441,648
Bytes per sector 512
Physical read/write heads 4 3
Discs 2
Cache (Mbytes) 8
Recording density, BPI (bits/inch typical) 835k
Track density, TPI (tracks/inch typical) 150k
Areal density (Gbits/inch2 max) 132
Spindle speed (RPM) 5,400
Internal data transfer rate (Mbits/sec max) 352
I/O data-transfer rate (Mbytes/sec max) 100
ATA data-transfer modes supported PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
Height 9.5 +/-0.2 mm (0.374 +/-.008 inches)
Width 69.85 +/-0.25 mm (2.750 +/-0.010 inches)
Length 100.50 +/-0.25 mm (3.957 +/-0.010 inches)
Weight (typical) 100 grams (0.22 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.0
Standby to ready (sec typical) 3.0
Track-to-track seek time (msec typical) 1.0 (read), 1.5 (write)
Average random seek , write (msec typical) 13.0
Average random seek, read (msec typical) 11.0
Average random seek, (msec typical) 12.5
Full-stroke seek (msec) 22 (typical); 24 (max)
Startup current 5V (typical) 1.0 amps

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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
*One Gbyteequalsone billionbyteswhenreferringtoharddrivecapacity.Accessiblecapacitymayvarydependingonoperatingenvironment
and formatting.
**During periods of drive idle, some offline activity may occur, according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby
modes will not contribute to battery power consumption.
Seek power (typical) 2.0 watts
Read/write power (typical) Read: 2.0 watts; Write: 1.8 watts
Idle mode (typical, low power) 0.8 watts
Standby mode 0.2 watts (typical)***
Sleep mode 0.2 watts (typical)***
Voltage tolerance (including noise) 5V ± 5%
Ambient temperature 0° to 40°C (operating), –40° to 70°C (nonoperating)
Duty 50%, Power-on Hours (POH): 8760/year
Temperature gradient
(°C per hour max, noncondensing) 20°C (operating) 30°C (nonoperating)
Relative humidity
(noncondensing) 5% to 90% (operating) 5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature (°C max) 30°C (operating)
38°C (nonoperating)
Altitude, operating –304.8 m to 3,048 m (–1000 ft to 10,000 ft)
Altitude, nonoperating (below mean sea level) –304.8 m to 12,192 m (–1,000 ft to 40,000 ft) max
Shock, operating (Gs max at 2 msec) 350
Shock, nonoperating (Gs max at 2 msec) 800
Shock, nonoperating (Gs max at 1 msec) 900
Shock, nonoperating (Gs max at 0.5 msec) 400
Vibration, operating (max displacement may apply below 10 hz) 1.0 Gs (0 to peak, 5–500 Hz)
Vibration, nonoperating (max displacement may apply below 22 hz) 5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels), 2 disc
Idle** 2.4 (typical)
2.6 (max)
Performance seek 3.0 (typical)
3.2 (max)
Nonrecoverable read errors 1 per 1014 bits read
Annualized Failure Rate (AFR) <1.79%
Load/Unload (U/UL) cycles
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 20% relative humidity
60°C, 20% relative humidity
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
Warranty 5 years on distribution units.
To determine the warranty for a specific drive, use a web
browser to access the following web page:
www.seagate.com/support/service/
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.
Table 1: Specifications for 160 and 120 Gbyte models
Drive specification ST9160821AB ST9120822AB

Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
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Table 1: Specifications for 100 and 80 Gbyte models
Drive specification ST9100828AB ST980815AB
Formatted Gbytes (512 bytes/sector)* 100 80
Guaranteed sectors 195,371,568 156,301,488
Bytes per sector 512
Physical read/write heads 3 2
Discs 2 1
Cache (Mbytes) 8
Recording density, BPI (bits/inch typical) 835k
Track density, TPI (tracks/inch typical) 150k
Areal density (Gbits/inch2 max) 132
Spindle speed (RPM) 5,400
Internal data transfer rate (Mbits/sec max) 352
I/O data-transfer rate (Mbytes/sec max) 100
ATA data-transfer modes supported PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
Height 9.5 +/-0.2 mm (0.374 +/-.008 inches)
Width 69.85 +/-0.25 mm (2.750 +/-0.010 inches)
Length 100.50 +/-0.25 mm (3.957 +/-0.010 inches)
Weight (typical) 100 grams (0.22 lb) 96 grams (0.21 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.0
Standby to ready (sec typical) 3.0
Track-to-track seek time (msec typical) 1.0 (read), 1.5 (write)
Average random seek , write (msec typical) 13.0
Average random seek, read (msec typical) 11.0
Average random seek, (msec typical) 12.5
Full-stroke seek (msec) 22 (typical); 24 (max)
Startup current 5V (typical) 1.0 amps
Seek power (typical) 2.0 watts
Read/write power (typical) Read: 2.0 watts; Write: 1.8 watts
Idle mode (typical, low power) 0.8 watts
Standby mode 0.2 watts (typical)***
Sleep mode 0.2 watts (typical)***
Voltage tolerance (including noise) 5V ± 5%
Ambient temperature 0° to 40°C (operating), –40° to 70°C (nonoperating)
Duty 50%, Power-on Hours (POH): 8760/year
Temperature gradient
(°C per hour max, noncondensing) 20°C (operating) 30°C (nonoperating)
Relative humidity
(noncondensing) 5% to 90% (operating) 5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature (°C max) 30°C (operating)
38°C (nonoperating)
Altitude, operating –304.8 m to 3,048 m (–1000 ft to 10,000 ft)
Altitude, nonoperating (below mean sea level) –304.8 m to 12,192 m (–1,000 ft to 40,000 ft) max
Shock, operating (Gs max at 2 msec) 350
Shock, nonoperating (Gs max at 2 msec) 800

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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
*One Gbyteequalsone billionbyteswhenreferringtoharddrivecapacity.Accessiblecapacitymayvarydependingonoperatingenvironment
and formatting.
**During periods of drive idle, some offline activity may occur, according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby
modes will not contribute to battery power consumption.
Shock, nonoperating (Gs max at 1 msec) 900
Shock, nonoperating (Gs max at 0.5 msec) 400
Vibration, operating
(max displacement may apply below 10 hz) 1.0 Gs (0 to peak, 5–500 Hz)
Vibration, nonoperating
(max displacement may apply below 22 hz) 5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels), 2 disc
Idle** 2.4 (typical)
2.6 (max)
Performance seek 2.9 (typical)
3.1 (max)
Nonrecoverable read errors 1 per 1014 bits read
Annualized Failure Rate (AFR) <1.79%
Load/Unload (U/UL) cycles
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 20% relative humidity
60°C, 20% relative humidity
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
Warranty 5 years on distribution units.
To determine the warranty for a specific drive, use a web browser
to access the following web page:
www.seagate.com/support/service/
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.
Table 1: Specifications for 100 and 80 Gbyte models
Drive specification ST9100828AB ST980815AB

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Table 1: Specifications for 60 and 40 Gbyte models
Drive specification ST960815AB ST9402116AB
Formatted Gbytes (512 bytes/sector)* 60 40
Guaranteed sectors 117,210,240 78,140,160
Bytes per sector 512
Physical read/write heads 2 1
Discs 1
Cache (Mbytes) 8
Recording density, BPI (bits/inch typical) 835k
Track density, TPI (tracks/inch typical) 150k
Areal density (Gbits/inch2 max) 132
Spindle speed (RPM) 5,400
Internal data transfer rate (Mbits/sec max) 352
I/O data-transfer rate (Mbytes/sec max) 100
ATA data-transfer modes supported PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–5
Height 9.5 +/-0.2 mm (0.374 +/-.008 inches)
Width 69.85 +/-0.25 mm (2.750 +/-0.010 inches)
Length 100.50 +/-0.25 mm (3.957 +/-0.010 inches)
Weight (typical) 96 grams (0.21 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.0
Standby to ready (sec typical) 3.0
Track-to-track seek time (msec typical) 1.0 (read), 1.5 (write)
Average random seek , write (msec typical) 13.0
Average random seek, read (msec typical) 11.0
Average random seek, (msec typical) 12.5
Full-stroke seek (msec) 22 (typical); 24 (max)
Startup current 5V (typical) 1.0 amps
Seek power (typical) 2.0 watts
Read/write power (typical) Read: 2.0 watts; Write: 1.8 watts
Idle mode (typical, low power) 0.8 watts
Standby mode 0.2 watts (typical)***
Sleep mode 0.2 watts (typical)***
Voltage tolerance (including noise) 5V ± 5%
Ambient temperature 0° to 40°C (operating), –40° to 70°C (nonoperating)
Duty 50%, Power-on Hours (POH): 8760/year
Temperature gradient
(°C per hour max, noncondensing) 20°C (operating) 30°C (nonoperating)
Relative humidity
(noncondensing) 5% to 90% (operating) 5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature (°C max) 30°C (operating)
38°C (nonoperating)
Altitude, operating –304.8 m to 3,048 m (–1000 ft to 10,000 ft)
Altitude, nonoperating (below mean sea level) –304.8 m to 12,192 m (–1,000 ft to 40,000 ft) max
Shock, operating (Gs max at 2 msec) 350
Shock, nonoperating (Gs max at 2 msec) 800

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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
*One Gbyteequalsone billionbyteswhenreferringtoharddrivecapacity.Accessiblecapacitymayvarydependingonoperatingenvironment
and formatting.
**During periods of drive idle, some offline activity may occur, according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
***Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby
modes will not contribute to battery power consumption.
Shock, nonoperating (Gs max at 1 msec) 900
Shock, nonoperating (Gs max at 0.5 msec) 400
Vibration, operating
(max displacement may apply below 10 hz) 1.0 Gs (0 to peak, 5–500 Hz)
Vibration, nonoperating
(max displacement may apply below 22 hz) 5.0 Gs (0 to peak, 5–500 Hz)
Drive acoustics, sound power (bels), 2 disc
Idle** 2.4 (typical)
2.6 (max)
Performance seek 2.9 (typical)
3.1 (max)
Nonrecoverable read errors 1 per 1014 bits read
Annualized Failure Rate (AFR) <1.79%
Load/Unload (U/UL) cycles
25°C, 50% relative humidity
32°C, 80% relative humidity
5°C, 80% relative humidity
5°C, 20% relative humidity
60°C, 20% relative humidity
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
Warranty 5 years on distribution units.
To determine the warranty for a specific drive, use a web
browser to access the following web page:
www.seagate.com/support/service/
From this page, click on the “Verify Your Warranty” link. You
will be asked to provide the drive serial number, model num-
ber (or part number) and country of purchase. The system
will display the warranty information for your drive.
Table 1: Specifications for 60 and 40 Gbyte models
Drive specification ST960815AB ST9402116AB

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2.2 Formatted capacity
*OneGbyteequalsonebillionbyteswhenreferring toharddrivecapacity.Accessiblecapacitymayvarydependingonoperatingenvironment
and formatting.
2.3 Default logical geometry
LBA mode
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,
where n is the number of guaranteed sectors as defined above.
2.4 Physical organization
Model Formatted capacity* Guaranteed sectors Bytes per sector
ST9160821AB 160 Gbytes 312,581,808 512
ST9120822AB 120 Gbytes 234,441,648 512
ST9100828AB 100 Gbytes 195,371,568 512
ST980815AB 80 Gbytes 156,301,488 512
ST960815AB 60 Gbytes 117,210,240 512
ST9402116AB 40 Gbytes 78,140,160 512
Cylinders Read/write heads Sectors per track
16,383 16 63
Model Read/write heads Number of discs
ST9160821AB 4 2
ST9120822AB 3 2
ST9100828AB 3 2
ST980815AB 2 1
ST960815AB 2 1
ST9402116AB 1 1

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2.5 Recording and interface technology
2.6 Physical characteristics
Technology Specification
Interface Parallel ATA
Recording method Perdendicular
Recording density BPI (bits/inch typical) 835k
Track density TPI (tracks/inch typical) 150k
Areal density (Gbits/inch2max) 132
Spindle speed (RPM) (±0.2%) 5,400
Internal data-transfer rate OD (Mbits/sec max) 352
I/O data-transfer rate (Mbytes/sec max) 100 (Ultra DMA mode 5)
Interleave 1:1
Cache buffer 8 Mbytes (8,192 kbytes)
Height (mm)
(inches) 9.5 +/–0.2 0.374 +/–0.008
Width (mm)
(inches) 69.85 +/–0.25 2.750 +/–0.010
Length (mm)
(inches) 100.50 +/–0.25 3.957 +/–0.010
Typical weight
ST9160821AB
ST9120822AB
ST9100828AB
ST980815AB
ST960815AB
ST9402116AB
100 grams
0.22 pounds
96 grams
0.21 pounds

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2.7 Seek time
Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using
drive diagnostics. The specifications 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.
*Measured in performance mode
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 or exceed 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 speci-
fications.
2.8 Time to ready
Typical seek times (msec)* Read Write
Track-to-track 1.0 1.5
Average 11.0 13.0
Full-stroke 22.0 24.0
Average latency 5.56 5.56
Time to ready Typical Max @ 25°C
Power-on to Ready (sec) 3.0 8.0
Standby to Ready (sec) 3.0 8.0

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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
2.9 Power specifications
The drive receives DC power (+5V) through the interface connector.
2.9.1 Power consumption
Power requirements for the drives are listed in the table on page 12. Typical power measurements are based
on an average of drives tested, under nominal conditions, at 25°C ambient temperature.
• Spinup power
Spinuppowerismeasuredfromthetimeofpower-ontothetimethatthedrivespindlereachesoperatingspeed.
• Seek mode
During seek mode, the read/write actuator armmoves toward a specific position on the disc surface anddoes
not execute a read or write operation. Servo electronics are active. Seek mode power is measured based on
three random seek operations every 100 msecs. This mode is not typical.
•Read/write power and current
Read/write power is measured with the heads on track, based on three 63 sector read or write operations
every 100 msecs.
• Idle mode power*
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in
a random track location.
• Standby mode
During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/
write electronics are in power-down model
*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.
Table 2: DC power for 2 disk models
Power dissipation +5V average (25° C)
Spinup (typical) 1.0 amps
Seek 2.0 watts
Read 2.0 watts
Write 1.8 watts
Idle, performance 1.7 watts
Idle, active* 0.99 watts
Idle, low power mode* 0.8 watts
Standby 0.2 watts
Sleep 0.2 watts

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2.9.1.1 Typical current profile
Figure 4. Typical 5V startup and operation current profile
2.9.2 Conducted noise
Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on
the +5 volt line.
Using 5-volt power, the drive is expected to operate with a maximum of 100 mV 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.
2.9.3 Voltage tolerance
Voltage tolerance (including noise):
5V ± 5%

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Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
2.10 Environmental specifications
2.10.1 Ambient temperature
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive.
Duty 50%, power-on hours (POH) of 8,760 per year (24 hours per day, 7 days per week operation). Actual
drive case temperature should not exceed 45°C (113°F) within the operating ambient conditions.
Above 1,000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet.
2.10.2 Temperature gradient
2.10.3 Humidity
2.10.3.1 Relative humidity
2.10.3.2 Wet bulb temperature
2.10.4 Altitude
Operating 0° to 40°C (32° to 104°F)
Nonoperating –40° to 70°C (–40° to 158°F)
Operating 20°C per hour (68°F per hour max), without condensation
Nonoperating 30°C per hour (86°F per hour max), without condensation
Operating 5% to 90% noncondensing (30% per hour max)
Nonoperating 5% to 95% noncondensing (30% per hour max)
Operating 30°C (86°F max)
Nonoperating 38°C (100.4°F max)
Operating –304.8 m to 3,048 m (–1,000 ft to 10,000 ft)
Nonoperating –304.8 m to 12,192 m (–1,000 ft to 40,000 ft)