User Manual

Seagate BarraCuda Product Manual, Rev. F 10
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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
Power-on to ready
(in seconds)
11 (typical)
Standby to ready
(in seconds)
11 (typical)
Ready to spindle stop
(in seconds)
11 (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 3.9
Read/Write 5.1
Standby 0.3
Sleep 0.3
Note
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.