Device Overview
1-14
C141-E224
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."
Table 1.7 Advanced Power Management
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.
Summary of Contents for MHV2040BH
Page 1: ...C141 E224 02EN MHV2120BH MHV2100BH MHV2080BH MHV2060BH MHV2040BH DISK DRIVES PRODUCT MANUAL ...
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Page 86: ...Interface 5 12 C141 E224 Figure 5 2 Example of the circuit for driving Ready LED ...
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