Seagate BARRACUDA GREEN ST2000DL003 Manual download pdf (Page 17)

Barracuda Green SATA Product Manual, Rev. B 17

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Drive Specifications

2.8.2 Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the

+12V line or an equivalent 15-ohm resistive load on the +5V line.

• Using 12-V 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-V power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave

injected noise at up to 10MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.

2.8.3 Voltage tolerance

Voltage tolerance (including noise):

5V +10% / -7.5%

12V +10% / -7.5%

2.8.4 Power-management modes

The drive provides programmable power management to provide greater energy efficiency. In most systems, you

can control power management through the system setup program. The drive features the following power-

management modes:

• Active mode

The drive is in Active mode during the read/write and seek operations.

• Idle mode

The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disk

access is necessary.

• Standby mode

The drive enters Standby mode when the host sends a Standby Immediate command. If the host has set the

standby timer, the drive can also enter Standby mode automatically after the drive has been inactive for a spec-

ifiable length of time. The standby timer delay is established using a Standby or Idle command. In Standby

mode, the drive buffer is enabled, the heads are parked and the spindle is at rest. The drive accepts all com-

mands and returns to Active mode any time disk access is necessary.

• Sleep mode

The drive enters Sleep mode after receiving a Sleep command from the host. In Sleep mode, the drive buffer is

disabled, the heads are parked and the spindle is at rest. The drive leaves Sleep mode after it receives a Hard

Reset or Soft Reset from the host. After receiving a reset, the drive exits Sleep mode and enters Standby mode

with all current translation parameters intact.

• Idle and Standby timers

Each time the drive performs an Active function (read, write or seek), the standby timer is reinitialized and

begins counting down from its specified delay times to zero. If the standby timer reaches zero before any drive

activity is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the drive

accepts all commands and returns to Active mode when disk access is necessary.

Power modes Heads Spindle Buffer

Active Tracking Rotating Enabled

Idle Tracking Rotating Enabled

Standby Parked Stopped Enabled

Sleep Parked Stopped Disabled

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Seagate BARRACUDA GREEN ST2000DL003 Manual Page 17

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