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2.7
Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to
2.7.1 Power consumption
Power requirements for the drives are listed in
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.
Table 3
DC power requirements for 8TB and 6TB models
Power dissipation
Spinup
Idle, Low Power
Read/Write
Standby
Sleep
Table 4
DC power requirements for 4TB, 3TB and 2TB models
Power dissipation
Spinup
Idle, Low Power
Read/Write
Standby
Sleep
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.
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.
Note
Seagate BarraCuda Product Manual, Rev. D
Table 3
Avg (watts 25° C)
Avg 5V typ amps
—
3.4
5.3
0.25
0.25
Avg (watts 25° C)
Avg 5V typ amps
—
2.5
3.7
0.25
0.25
and
. Typical power measurements are based on an average
Table 4
Avg 12V typ amps
—
2.0
0.10
0.242
0.28
0.325
0.04
0.004
0.04
0.004
Avg 12V typ amps
—
2.0
0.12
0.15
0.28
0.191
0.04
0.004
0.04
0.004
Drive Specifications
Figure 1 on page 20
.
12
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