Seagate ST980210AS ユーザーズマニュアル

LD25 Series 5400.2 Product Manual, Rev. C

11

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:

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

The buffer remains enabled in performance mode, and the drive accepts all commands and returns to Active 
mode any time disc access is necessary.

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 
specifiable 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 

commands and returns to Active mode any time disc access is necessary.

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.

Active (operating)

Tracking

Rotating

Enabled

Idle

Tracking

Rotating

Enabled

Idle, active

Floating

Rotating

Disabled

Idle, low power

Parked

Rotating

Disabled

Standby

Parked

Stopped

Enabled

Sleep

Parked

Stopped

Disabled