Fujitsu MHN2200AT, MHN2150AT, MHN2100AT, MHN2300AT manual Host Commands

	5.3 Host Commands
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 register with the desired power management level and executes this command with the Features register 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 command for a specific time. The power management level is shifted from Active Idle, and Low power Idle to Standby. The Mode-3 takes the maximum shifting time in the APM level. The APM level setting is preserved by the drive across power on, hardware and software resets.

		APM Level	Sector Count register
	Mode-0	Low Power Idle	C0h-FEh
	Mode-1	Low Power Idle	80h-BFh
	Mode-2	Standby	40h-7Fh
	Mode-3	Standby	01h-3Fh
	Reserved		FFh, 00h
Active Idle		: The spindle motor is rotating and heads are loaded on
		the medium.
Low Power Idle		: The spindle motor is rotating and heads are unloaded
		from the ramp.
Standby		: The spindle motor is not rotating and heads are
		unloaded from the ramp.

*3) Automatic Acoustic Management (AAM)

The host writes to the Sector Count register with the requested acoustic management level and executes this command with subcommand code 42h, and

C141-E120-02EN 5-43