Fujitsu MPD3XXXAT Active mode, A device enters the active mode under the following conditions

Models: MPD3XXXAT

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(1)Active mode

In this mode, all the electric circuit in the device are active or the device is under seek, read or write operation.

A device enters the active mode under the following conditions:

Power-on sequence is completed.

A command other than power commands is issued.

Reset (hardware or software)

(2)Idle mode

In this mode, circuits on the device is set to power save mode. The device enters the Idle mode under the following conditions:

After completion of power-on sequence.

After completion of the command execution other than SLEEP and STANDBY commands.

Reset (hardware or software)

(3)Standby mode

In this mode, the VCM circuit is turned off and the spindle motor is stopped.

The device can receive commands through the interface. However if a command with disk access is issued, response time to the command under the standby mode takes longer than the active or Idle mode because the access to the disk medium cannot be made immediately.

The drive enters the standby mode under the following conditions:

A STANDBY or STANDBY IMMEDIATE command is issued in the active or idle mode.

When automatic power down sequence is enabled, the timer has elapsed.

A reset is issued in the sleep mode.

When one of following commands is issued, the command is executed normally and the device is still stayed in the standby mode.

Reset (hardware or software)

STANDBY command

STANDBY IMMEDIATE command

C141-E069-02EN

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Page 176
Image 176
Fujitsu MPD3XXXAT Active mode, A device enters the active mode under the following conditions, ∙ STANDBY IMMEDIATE command