Fujitsu MHY2120BH 用户手册

C141-E262 

1-15 

 

Low Power Idle: 

The head is unloaded from disk. 
The spindle motor rotates. 

Standby: 

The spindle motor stops. 

In APM Mode-1, which is the APM default mode, the operation status shifts till it 
finally reaches "Low Power Idle." 

APM Mode 

Active Idle 

(VCM Lock) 

Low Power Idle 

(Unload) 

Standby 

(Spin Off) 

Mode-0 

0.2-1.2 sec 

15 min. 

N/A 

Mode-1 

0.1-0.2 sec 

10.0-27.5 sec 

N/A 

Mode-2 

0.1-0.2 sec 

10.0-27.5 sec 

10.0-40.0 sec 

When the maximum time that the HDD is waiting for commands has been 
exceeded:  

Mode-0:  Mode shifts from Active condition to Active Idle in 0.2-1.2, and to Low 

Power Idle in 15 minutes. 

Mode-1:  Mode shifts from Active condition to Active Idle in 0.1-0.2 seconds and 

to Low Power Idle in 10.0-27.5 seconds. 

Mode-2:  Mode shifts from Active condition to Active Idle in 0.1-0.2 seconds and 

to Low Power Idle in 10.0-27.5 seconds.  After 10.0-40.0 seconds in 
Low Power Idle, the mode shifts to standby. 

Remark: 

The default values of these settings are reflected in the WORD 91 values of the 
IDENTIFY DEVICE command.  Also, the APM mode is initialized to Mode-1 
(default value) at power-off.  

The above mentioned is time until shifting to each power mode based on point 
that the drive becomes a command waiting state.