4.5.3Drive Power Dissipation

Table 4-5lists the drive power dissipation and the corresponding currents for the various modes of operation of the Maxtor Atlas 10K V hard disk drive.

Table 4-5Power Dissipation in Various Modes (Low-Profile Drives)

 

TYPICAL AVERAGE CURRENT1, 4

TYPICAL AVG.

 

(AMP RMS UNLESS OTHERWISE NOTED)

POWER5 (WATTS)

 

 

 

 

 

 

 

 

 

 

MODE OF

 

+12V

 

 

+5V

 

 

 

 

OPERATION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

73.5 GB

147.1

300 GB

73.5 GB

147.1

300 GB

73.5 GB

147.1

300 GB

 

GB

GB

GB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Startup

1.34

1.33

1.57

0.84

0.68

0.69

19.7

19.4

22.41

peak1

 

 

 

 

 

 

 

 

 

 

Idle2

0.33

0.38

0.56

0.81

0.77

0.80

8.01

8.52

10.77

 

 

 

 

 

 

 

 

 

 

Max Work

0.75

0.78

0.96

0.84

0.80

0.83

13.16

13.32

15.70

 

 

 

 

 

 

 

 

 

 

Note:

1.Current is RMS except for Startup. Startup current is the peak (> 10 ms) current required during spindle startup. Current measurements do not include power required for SCSI termination.

2.Idle mode is in effect when the drive is not reading, writing, seeking, or executing any commands. A portion of the R/W circuitry is powered down, the motor is up to speed and the Drive Ready condition exists.

3.Max Workload: Maximum workload is defined as a random read/write profile with a 50% read and 50% write distribution. The transfer length is 8 blocks (4KB), and a queue depth of 4 is used.

4.Power requirements reflect nominal values for +12V and +5V power supplies.

4-6 Maxtor Atlas 10K V