Travelstar 5K160 (SATA) Hard Disk Drive Specification

4.4.3Operating modes

Operating mode

Description

 

 

Spin-Up

Start up time period from spindle stop or power down.

 

 

 

Seek

Seek operation mode

 

 

 

Write

Write operation mode

 

 

 

Read

Read operation mode

 

 

 

Performance

The device is capable of responding immediately to idle media access requests. All

electronic components remain powered and the full frequency servo remains

 

operational.

 

The device is capable of responding immediately to media access requests. Some

Active idle

circuitry—including servo system and R/W electronics—is in power saving mode.

The head is parked near the mid-diameter the disk without servoing.

 

A device in Active idle mode may take longer to complete the execution of a

 

command because it must activate that circuitry.

Low power idle

The head is unloaded onto the ramp position. The spindle motor is rotating at full

speed.

 

Standby

The device interface is capable of accepting commands. The spindle motor is

stopped. All circuitry but the host interface is in power saving mode.

 

The execution of commands is delayed until the spindle becomes ready.

Sleep

The device requires a soft reset or a hard reset to be activated. All electronics,

including spindle motor and host interface, are shut off.

 

Table 10. Operating mode

4.4.3.1Mode transition time

From

To

Transition

Transition Time

 

 

Time (typ)

(max.)

Standby

Idle

2.5

9.5

Table 11. Drive ready time

4.4.3.2Operating mode at power on

The device goes into Idle mode after power on or hard reset as an initial state. Initial state may be changed to Standby mode using pin C on the interface connector. Refer to section 7.10 on page 58, "Drive address setting" for details.

4.4.3.3Adaptive power save control

The transient timing from Performance Idle mode to Active Idle mode and Active Idle mode to Low Power Idle mode is controlled adaptively according to the access pattern of the host system. The transient timing from Low Power Idle mode to Standby mode is also controlled adaptively, if it is allowed by Set Features Enable Advanced Power Management subcommand.

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Hitachi HTS541680J9SA00 Operating modes, Mode transition time, Operating mode at power on, Adaptive power save control

HTS541640J9SA00, HTS541616J9SA00, HTS541680J9SA00, HTS541612J9SA00, HTS541660J9SA00 specifications

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