Operating Modes; Table 10. Description Of Operating Modes; Table 11. Drive Ready Time - Hitachi 7K100 - Travelstar - Hard Drive Specifications

4.4.3 Operating modes

4.4.3.1 Description of operating modes
Table 10: Description of operating modes
Operating mode
Spin-up
Seek
Write
Read
Performance
Idle
Active idle
Low power idle
Standby
Sleep
4.4.3.2 Mode transition time - from Standby to Idle
Table 11: Drive ready time
From
Standby
4.4.3.3 Operating 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. See section 7.10, "Drive address setting" on page 51 for
details.
4.4.3.4 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. The transient timing from Low
Power Idle mode to Standby mode is also controlled adaptively, if it is allowed by Set Features Enable Adavanced
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 idle media access requests. All elec-
tronic components remain powered and the full frequency servo remains operational.
The device is capable of responding immediately to media access requests. Some cir-
cuitry—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 except 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 3.0
Travelstar 7K100 Hard Disk Drive Specification
Transition Time
(max.)
9.5
16