Fujitsu MHV2100BH, MHV2080BH, MHV2040BH, MHV2060BH manual Advanced Power Management APM

Models: MHV2100BH MHV2040BH MHV2060BH MHV2080BH

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Interface

Transfer mode

Sector Count file

 

 

Multiword DMA transfer mode X

00100 000 (X’20’: Mode 0)

 

 

 

00100 001 (X’21’: Mode 1)

 

 

 

00100 010 (X’22’: Mode 2)

 

 

Ultra DMA transfer mode X

01000 000 (X’40’: Mode 0)

 

 

 

01000 001 (X’41’: Mode 1)

 

 

 

01000 010 (X’42’: Mode 2)

 

 

 

01000 011 (X’43’: Mode 3)

 

 

 

01000 100 (X’44’: Mode 4)

 

 

 

01000 101 (X’45’: Mode 5)

 

 

*2) Advanced Power Management (APM)

The host writes the Sector Count field with the desired power management level and executes this command with the Features field X’05’, and then Advanced Power Management is enabled.

The drive automatically shifts to power saving mode up to the specified APM level when the drive does not receive any commands for a specific time. The sequence in which the power management level shifts is from Active Idle to Low Power Idle to Standby. The Mode-2 level requires the longest shifting time, depending on the APM level settings. The settings of the APM level revert to their default values (Mode-1) when power-on or COMRESET occurs for the drive.

APM Level

Mode 0 Active Idle Low Power Idle Mode 1 Active Idle Low Power Idle

Mode 2 Active Idle Low Power Idle Standby Reserve (State Keep)

Sector Count Field

C0h-FEh

80h-BFh

01h-7Fh

00h, FFh

Active Idle:

The spindle motor rotates, and the head is loaded on

 

the most inner position on media.

Low Power Idle: The spindle motor rotates, and the head is unloaded.

Standby:

The spindle motor stops, and the head is unloaded.

5-104

C141-E224

Page 180
Image 180
Fujitsu MHV2100BH, MHV2080BH, MHV2040BH, MHV2060BH manual Advanced Power Management APM