Seagate ST94019A Momentus 4200 Product Manual - Page 18

8

Momentus 42 Product Manual, Rev. A

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 8. 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

Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed.

•

Seek mode

During seek mode, the read/write actuator arm moves toward a specific position on the 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.

*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

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

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

Section	Page
1.0 Introduction 1	7
2.0 Drive specifications 3	7
2.1 Specification summary 3	7
2.2 Formatted capacity 5	7
2.3 Default logical geometry 5	7
2.4 Physical organization 5	7
2.5 Recording and interface technology 6	7
2.6 Physical characteristics 6	7
2.7 Seek time 7	7
2.8 Time to ready 7	7
2.9 Power specifications 8	7
2.9.1 Power consumption 8	7
2.9.2 Conducted noise 9	7
2.9.3 Voltage tolerance 9	7
2.9.4 Power-management modes 10	7
2.10 Environmental specifications 11	7
2.10.1 Ambient temperature 11	7
2.10.2 Temperature gradient 11	7
2.10.3 Humidity 11	7
2.10.4 Altitude 11	7
2.10.5 Shock 12	7
2.10.6 Vibration 12	7
2.11 Acoustics 13	7
2.12 Electromagnetic immunity 13	7
2.13 Reliability 14	7
2.14 Agency certification 14	7
2.14.1 Safety certification 14	7
2.14.2 Electromagnetic compatibility 14	7
2.14.3 FCC verification 15	7
3.0 Configuring and mounting the drive 17	7
3.1 Handling and static discharge precautions 17	7
3.2 Jumper settings 17	7
3.2.1 Master/slave configuration 17	7
3.2.2 Cable-select option 18	7
3.3 Drive mounting 18	7
4.0 ATA interface 19	7
4.1 ATA interface signals and connector pins 19	7
4.1.1 Supported ATA commands 20	7
4.1.2 Identify Device command 22	7
4.1.3 Set Features command 25	7
4.1.4 S.M.A.R.T. commands 26	7
5.0 Seagate Technology support services 27	7
Figure 1. Momentus 42 disc drive 1	9
Figure 2. Typical 5V startup and operation current profile 9	9
Figure 3. Jumper settings 17	9
Figure 4. Mounting dimensions-top, side and end view 18	9
1.0 Introduction	11
2.0 Drive specifications	13
2.1 Specification summary	13
2.2 Formatted capacity	15
2.3 Default logical geometry	15
2.4 Physical organization	15
2.5 Recording and interface technology	16
2.6 Physical characteristics	16
2.7 Seek time	17
2.8 Time to ready	17
2.9 Power specifications	18
2.9.1 Power consumption	18
2.9.1.1 Typical current profile	19
2.9.2 Conducted noise	19
2.9.3 Voltage tolerance	19
2.9.4 Power-management modes	20
2.10 Environmental specifications	21
2.10.1 Ambient temperature	21
2.10.2 Temperature gradient	21
2.10.3 Humidity	21
2.10.3.1 Relative humidity	21
2.10.3.2 Wet bulb temperature	21
2.10.4 Altitude	21
2.10.5 Shock	22
2.10.5.1 Operating shock	22
2.10.5.2 Nonoperating shock	22
2.10.6 Vibration	22
2.10.6.1 Operating vibration	22
2.10.6.2 Nonoperating vibration	22
2.11 Acoustics	23
2.12 Electromagnetic immunity	23
2.13 Reliability	24
2.14 Agency certification	24
2.14.1 Safety certification	24
2.14.2 Electromagnetic compatibility	24
2.14.3 FCC verification	25
3.0 Configuring and mounting the drive	27
3.1 Handling and static discharge precautions	27
3.2 Jumper settings	27
3.2.1 Master/slave configuration	27
3.2.2 Cable-select option	28
3.3 Drive mounting	28
4.0 ATA interface	29
4.1 ATA interface signals and connector pins	29
4.1.1 Supported ATA commands	30
4.1.2 Identify Device command	32
4.1.3 Set Features command	35
4.1.4 S.M.A.R.T. commands	36
5.0 Seagate Technology support services	37
Index	43
Numerics	43
A	43
B	43
C	43
D	43
E	43
F	43
G	43
H	43
I	43
J	44
K	44
L	44
M	44
N	44
O	44
P	44
R	44
S	44
T	45
U	45
V	45

Seagate ST94019A Momentus 4200 Product Manual - Page 18

Power specifications - connector

Page 18 highlights