C
ONSTELLATION
ES S
ERIAL
ATA P
RODUCT
M
ANUAL
, R
EV
. F
7
2.7
S
TART
/
STOP TIMES
2TB models
1TB models
500GB models
Power-on to Ready (sec)
15 (max)
10 (max)
7 (max)
Standby to Ready (sec)
15 (max)
10 (max)
7 (max)
Ready to spindle stop (sec)
20 (max)
2.8
P
OWER SPECIFICATIONS
The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 5 on page
24.
2.8.1
Power consumption
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 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.
• Seek mode
During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and does not execute a read or
write operation. Servo electronics are active. Seek mode power represents the worst-case power consumption, using only random
seeks with read or write latency time. This mode is not typical and is provided for worst-case information.
• 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 32ms 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.
