Seagate Momentus 4200 N-Lite ST940110A User manual

Momentus 4200 N-Lite
ST940110A

Momentus 4200 N-Lite
ST940110A

© 2004 Seagate Technology LLC All rights reserved
Publication number: 100354613, Rev. A
October 2004
Seagate and Seagate Technology are registered trademarks of Seagate Technology LLC.
SeaBOARD, SeaFONE, SeaTDD, SeaTools, and the Wave logo are either registered trade-
marks or trademarks of Seagate Technology LLC. Other product names are registered trade-
marks or trademarks of their owners.
Seagate reserves the right to change, without notice, product offerings or specifications. No
part of this publication may be reproduced in any form without written permission ofSeagate
Technology LLC.

Revision status summary sheet
Revision Date Sheets Affected
Rev. A 10/26/2004 All.

Momentus 4200 N-Lite Product Manual, Rev. A v
Contents
1.0 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Specification summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Recording and interface technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.6 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.7 Seek time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.8 Time to ready. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.9 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.9.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.9.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.9.3 Voltage tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.9.4 Power-management modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.10 Environmental specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.10.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.10.2 Temperature gradient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.10.3 Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.10.4 Altitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.10.5 Shock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.10.6 Vibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.11 Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.12 Electromagnetic immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.13 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.14 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.14.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.14.2 Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.14.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Handling and static discharge precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.1 Master/slave configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.2 Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.3 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 ATA interface signals and connector pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.1 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1.2 Identify Device command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1.3 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1.4 S.M.A.R.T. commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.0 Seagate Technology support services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

vi Momentus 4200 N-Lite Product Manual, Rev. A

Momentus 4200 N-Lite Product Manual, Rev. A vii
List of Figures
Figure 1. Momentus 4200 N-Lite disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Typical 5V startup and operation current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 3. Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 4. Mounting dimensions—top, side and end view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

viii Momentus 4200 N-Lite Product Manual, Rev. A

Momentus 4200 N-Lite Product Manual, Rev. A 1
1.0 Introduction
This manual describes the functional, mechanical and interface specifications for the following Seagate®
Momentus™ 4200 N-Lite drive:
• ST940110A
This drive provides the following key features:
• 4,200-RPM-class1performance spindle speed and 2-Mbyte buffer combine for superior performance.
• Quiet operation. Fluid Dynamic Bearing (FDB) motor.
• High instantaneous (burst) data transfer rates (up to 100 Mbytes per second) using Ultra DMA mode 5.
• Giant magnetoresistive (GMR) recording heads and EPRML technology, which provide the drives with
increased areal density.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Full-track multiple-sector transfer capability without local processor intervention.
• 800 Gs nonoperating shock, and 100 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 that use cable select (CSEL).
Figure 1. Momentus 4200 N-Lite disc drive
1Actual spin speed is 5,400 RPM.

2 Momentus 4200 N-Lite Product Manual, Rev. A

Momentus 4200 N-Lite Product Manual, Rev. A 3
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
ST940110A model drives.
2.1 Specification summary
The specifications listed in this table are for quick reference. For details on specification measurement or defi-
nition, see the appropriate section of this manual.
Table 1: Specifications
Drive specification ST940110A
Formatted Gbytes (512 bytes/sector) 40
Guaranteed sectors 78,140,160
Bytes per sector 512
Physical read/write heads 2
Discs 1
Cache (Mbytes) 2
Recording density, BPI (bits/inch max) 642,000
Track density. TPI (tracks/inch max) 100,780
Areal density (Bbits/inch2 max) 65
Spindle speed (RPM) 4,200-class performance
(spin speed actually 5,400 RPM)
Internal data transfer rate OD (Mbytes/sec max) 48.25
Sustained data transfer rate OD (Mbytes/sec) 31.0
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 +/-.0078 inches)
Width 69.85 +/-0.25 mm (2.75 +/-0.0098 inches)
Length 100.2 +/-0.25 mm (3.945 +/-0.0098 inches)
Weight (typical) 99 grams (0.218 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.9
Standby to ready (sec typical) 2.5 sec
Startup current 5V (peak) 1.2 amps
Track-to-track seek time (msec typical) 1.5 (read), 2.0 (write)
Average seek time (msec typical) 12.0
Average seek, read (msec typical) 12.0

4 Momentus 4200 N-Lite Product Manual, Rev. A
*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.
Average seek, write (msec typical) 14.0
Full-stroke seek (msec) 22 (typical); 26 (max)
Seek power (typical) 2.4 watts
Read/write power (typical) 2.4 watts
Idle mode (typical) 1.2 watts
Standby mode 0.36 watts (typical)**
Sleep mode 0.36 watts (typical)**
Voltage tolerance (including noise) 5V ± 5%
Ambient temperature 5° to 55°C (operating)
–40° to 65°C (nonoperating)
Temperature gradient (°C per hour max) 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) 33°C (operating)
40°C (nonoperating)
Altitude, operating –192.12 m to 3,048 m (–650 ft to 10,000+ ft)
Altitude, nonoperating (below mean sea level, max) –304.8 m to 12,192 m (–1,000 ft to 40,000+ ft)
Shock, operating (Gs max at 2 msec) 100
Shock, nonoperating (Gs max at 2 msec) 800
Shock, nonoperating (Gs max at 1 msec) 800
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)
Idle* 2.3 (typical)
2.5 (max)
Quiet seek 2.5 (typical)
2.7 (max)
Performance seek 3.0 (typical)
3.2 (max)
Nonrecoverable read errors 1 per 1014 bits read
Mean time between failures (power-on hours) 330,000 at 25°C (2400 POH)
Max case temperature: 60°C
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
300,000 software-controlled power on/off cycles
20,000 hard power on/off cycles
100,000 software-controlled power on/off cycles
20,000 hard power on/off cycles
Service life 5 Years
Warranty 1 Year
Table 1: Specifications (Continued)
Drive specification ST940110A

Momentus 4200 N-Lite Product Manual, Rev. A 5
2.2 Formatted capacity
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
ST940110A 40 Gbytes 78,140,160 512
Cylinders Read/write heads Sectors per track
16,383 16 63
Model Read/write heads Number of discs
ST940110A 2 1

6 Momentus 4200 N-Lite Product Manual, Rev. A
2.5 Recording and interface technology
2.6 Physical characteristics
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.
Technology Specification
Interface Parallel ATA
Recording method RLL 0,11
Recording density BPI (bits/inch max) 642,000
Track density TPI (tracks/inch max) 100,780
Areal density (Mbits/inch2max) 65
Spindle speed (RPM) (± 0.2%) 4,200 class performance (spin speed actually 5,400 RPM)
Internal data-transfer rate OD (Mbytes/sec max) 48.25
Sustained data transfer rate OD (Mbytes/sec max) 31.0
I/O data-transfer rate (Mbytes/sec max) 100 (Ultra DMA mode 5)
Interleave 1:1
Cache buffer 2 Mbytes (2,048 kbytes)
Height (mm)
(inches) 9.5 +/-0.2 0.374 +/-0.0078
Width (mm)
(inches) 69.85 +/-0.25 2.75 +/-0.0098
Length (mm)
(inches) 100.2 +/-0.25 3.945 +/-0.0098
Typical weight (grams)
(pounds) 99 0.218
*Typical seek times (msec) Read Write
Track-to-track 1.5 2.0
Average 12.0 14.0
Full-stroke 22.0 26.0
Average latency 5.6 5.6

Momentus 4200 N-Lite Product Manual, Rev. A 7
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.
2.8 Time to ready
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 7. Typical power measurements are based on
an average of drives tested, under nominal conditions, using 5.0V input voltage at 25°C ambient temperature.
• Spinup power
Spinuppowerismeasuredfromthetimeofpower-ontothetimethatthedrivespindlereachesoperatingspeed.
• Seek mode
During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and does
not execute a read or write operation. Servo electronics are active. Seek mode power is measured based on
three random seek operations every 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.
• Operating power and current
Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each
10 reads) and 20 percent drive idle mode.
• 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 mode.
Time to ready Typical Max
Power-on to Ready (sec) 3.9 8.0
Standby to Ready (sec) 2.6 8.0
Table 2: DC power
Power dissipation (watts) Average (watts, 25° C) 5V typical amps
Spinup — 1.2
Idle, performance mode 2.00 0.4
Idle, active 1.20 0.24
Idle, low power mode 0.97 0.19
Operating 40% r/w.
40% seek, 20% inop. 2.87 0.72

8 Momentus 4200 N-Lite Product Manual, Rev. A
*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.
2.9.1.1 Typical current profile
Figure 2. 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%
Seeking 2.4 0.48
Read 2.4 0.48
Write 2.4 0.48
Standby 0.36 0.07
Sleep 0.36 0.07
Table 2: DC power
Power dissipation (watts) Average (watts, 25° C) 5V typical amps
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
0.0
0.2
0.4
0.6
0.8
1.0
A
mps
Seconds
+5 Volt Current during spindle start — Typical Amperes
1.2
4
.5

Momentus 4200 N-Lite Product Manual, Rev. A 9
2.9.4 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:
• 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 command. 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 lengthoftime. Thestandby timer delay isestablishedusing a Standby or Idlecommand.InStandby
mode, the drive buffer is enabled, 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 command from the host. In Sleep mode, the drive buffer
is disabled, 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.
Table 3: Power management modes
Power modes Heads Spindle Buffer
Active (operating) Tracking Rotating Enabled
Idle, performance Tracking Rotating Enabled
Idle, active Floating Rotating Disabled
Idle, low power Parked Rotating Disabled
Standby Parked Stopped Disabled
Sleep Parked Stopped Disabled

10 Momentus 4200 N-Lite Product Manual, Rev. A
2.10 Environmental specifications
2.10.1 Ambient temperature
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive.
Actual drive case temperature should not exceed 65°C (149°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 5° to 55°C (41° to 131°F)
Nonoperating –40° to 65°C (–40° to 153°F)
Operating 20°C per hour (68°F per hour max), without condensation
Nonoperating 30°C per hour (86°F per hour max)
Operating 5% to 90% noncondensing (30% per hour max)
Nonoperating 5% to 95% noncondensing (30% per hour max)
Operating 33°C (91.4°F max)
Nonoperating 40°C (104°F max)
Operating –192.12 m to 3,048 m (–650 ft to 10,000+ ft)
Nonoperating –304.8 to 12,192 m (–1,000 ft to 40,000+ ft)