Fujitsu MHN2200AT Manual/User Guide - Page 119
Ultra DMA transfer mode X, Advanced Power Management is enabled.
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5.3 Host Commands Multiword DMA transfer mode X Ultra DMA transfer mode X 00100 000 (X'20': Mode 0) 00100 001 (X'21': Mode 1) 00100 010 (X'22': Mode 2) 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 Mode-0 Low Power Idle Mode-1 Low Power Idle Mode-2 Standby Mode-3 Standby Reserved Sector Count register C0h-FEh 80h-BFh 40h-7Fh 01h-3Fh FFh, 00h Active Idle Low Power Idle Standby : The spindle motor is rotating and heads are loaded on the medium. : The spindle motor is rotating and heads are unloaded from the ramp. : 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