Start/Stop Times; Power Specifications; Power Consumption - Seagate BARRACUDA ST31000524AS Product Manual

Drive Specifications
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
the noted values. However, due to the manner in which these drives are formatted, benchmark
Note
tests that include command overhead or measure logical seeks may produce results that vary
from these specifications.

2.7 Start/stop times

Power-on to Ready (typ / max sec)
Standby to Ready (typ / max sec)
Ready to spindle stop (typ / max sec)

2.8 Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to
on page 28.

2.8.1 Power consumption

Power requirements for the drives are listed in
measurements are based on an average of drives tested, under nominal conditions, using 5.0V and 12.0V 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.
• Read/write power and current
Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-ms delay,
then a 16-sector read followed by a 32-ms delay.
• 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.
18
1000 and 750GB models
<10.0
<10.0
10
Table 4 on page 19 and
www.seagate.com
500, 320, 250 and 160GB models
<8.5
<8.5
10
Figure 1 on page 28
Table 5 on page 19 . Typical power
Barracuda SATA Product Manual, Rev. B