Seagate ST31000424CS ユーザーズマニュアル

12

Pipeline HD.2 Series SATA Product Manual, Rev. E 

The drive receives DC power (5V or 12V) through a native SATA power connector. Refer to Figure 2 on 
page 22.

Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on 
an average of drives tested, under nominal conditions, using 5V and 12V input voltage at 25°C ambient tem-
perature.
• Spinup power

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

Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in 
a random track location.

Operating power is measured by simulating a typical PVR operating environment, using a 50% write, 50% 
read algorithm.

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.

Spinup

—

—

2.0 (peak)

Idle*

3.834

0.223

0.226

Operating

4.107

0.295

0.219

Standby

0.699

0.121

0.008

Sleep

0.811

0.131

0.012

*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.

Note. Drive supports PHY layer power management. When enabled, a power savings of ~300mw can be 

achieved in Idle, Standby and Sleep modes.

Spinup

—

—

2.0 (peak)

Idle*

3.008

0.248

0.147

Operating

3.445

0.316

0.155

Standby

0.707

0.127

0.006

Sleep

0.742

0.134

0.006