Seagate BarraCuda Product Manual, Rev. D
10
www.seagate.com
2.6
Start/stop times
The start/stop times are listed below.
Time-to-ready may be longer than normal if the drive power is removed without going through normal OS powerdown
procedures.
2.7
Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to
Figure 2 on page 19
.
2.7.1 Power consumption
Power requirements for the drives are listed in
Table 2
. 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. These power measurements are done
with DIPM enabled.
• Spinup current is measured from the time of power-on to the time that the drive spindle reaches operating speed.
• Read/Write current is measured with the heads on track, based on three 64 sector read or write operations every 100
ms.
• The drive supports three idle modes: Performance Idle mode, Active Idle mode and Low Power Idle mode. Refer to
Section 2.7.4 for power-management modes.
2.7.2 Conducted noise
Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or
an equivalent 15-ohm resistive load on the +5 volt line.
• Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up
to 10MHz.
• Using 5-volt power, the drive is expected to operate with a maximum of
100 mV peak-to-peak square-wave injected noise at up
to 10MHz.
Standard models
ST2000DM008
(1-Disk)
Power-on to ready
(in seconds)
8 (typical)
Standby to ready
(in seconds)
8 (typical)
Ready to spindle stop
(in seconds)
10 (typical)
Table 2
DC power requirements for 2TB models
Power dissipation
Avg (watts 25° C)
Avg 12V typ amps
Spinup
—
2.0
Idle, Low Power
3.0
Read/Write
4.3
Standby
0.3
Sleep
0.3
Note
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.
