Hitachi Travelstar 5K320 HTS543232L9A300 Manual page 21

Operating modes
4.4.3
Operating mode
Spin-Up
Seek
Write
Read
Performance idle
Active idle
Low power idle
Standby
Sleep
Table 10. Operating mode
4.4.3.1 Mode transition time
From
Standby
Table 11. Drive ready time
4.4.3.2 Operating mode at power on
The device goes into Idle mode after power on or hard reset as an initial state..
4.4.3.3 Adaptive 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.
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.
Description
Start up time period from spindle stop or power down.
Seek operation mode
Write operation mode
Read operation mode
The device is capable of responding immediately to 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
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.
The head is unloaded onto the ramp position. The spindle motor is rotating at full
speed.
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.
The device requires a soft reset or a hard reset to be activated. All electronics,
including spindle motor and host interface, are shut off.
To Transition
Time (typ)
Idle 2.5
5K320 SATA OEM Specification
Transition Time
(max.)
9.5
21
The transient