Seagate BarraCuda Product Manual, Rev. A

12

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Drive Specifications

2.7

Start/stop times

Time-to-ready may be longer than normal if the drive power is removed without going through normal OS powerdown

procedures.

2.8

Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to Figure 1 on page 22.

2.8.1 Power consumption

Power requirements for the drives are listed in Table 2 and Table 3. 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 elec-

tronics are in power-down mode.

3-disk

(3TB models)

2-disk

(2TB models)

1-disk

(1TB models)

1-disk

(500GB models)

Power-on to ready (in seconds)

15 (typical)

17 (max)

10 (typical)

12 (max)

8.5 (typical)

10 (max)

Power-on to ready (typical)

<10

Standby to ready (in seconds)

15 (typical)

17 (max)

10 (typical)

12 (max)

8.5 (typical)

10 (max)

Ready to spindle stop (in seconds)

10 (typical)

11 (max)