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Barracuda SATA Product Manual, Rev. G 17
www.seagate.com
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 26.
2.8.1 Power consumption
Power requirements for the drives are listed in Table 3, Table 4, Table 5 and Table 6. 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.
3-disk
(3TB, 2TB
models)
2-disk
(2TB, 1.5TB
models)
1-disk
(1TB, 750GB
models)
1-disk
(250GB, 320GB,
500GB models)
Power-on to ready
( in seconds)
15 (typical)
17 (max)
15 (typical)
17 (max)
10 (typical)
12 (max)
8.5 (typical)
10 (max)
Power-on to ready, 2.5A
spin-up code option
(in seconds, typical)
<10 <10 n/a n/a
Standby to ready
(in seconds)
15 (typical)
17 (max)
15 (typical)
17 (max)
10 (typical)
12 (max)
8.5 (typical)
10 (max)
Ready to spindle stop
(in seconds)
10 (typical)
11 (max)
10 (typical)
11 (max)
10 (typical)
11 (max)
10 (typical)
11 (max)