Seagate BARRACUDA ST31000524AS User Manual download pdf (Page 18)

18 Barracuda SATA Product Manual, Rev. A

Drive Specifications www.seagate.com

2.6 Start/stop times

1000 and 750GB models 500, 320, 250 and 160GB models

Power-on to Ready (typ / max sec)

Standby to Ready (typ / max sec)

Ready to spindle stop (typ / max sec)

2.7 Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to Figure 1 on page 28

on page 28.

2.7.1 Power consumption

Power requirements for the drives are listed in Table 4 on page 19 and Table 5 on page 19. Typical power

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.

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 the noted values. 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.

<10.0 <8.5

10 10

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Seagate BARRACUDA ST31000524AS User Manual Page 18