Automatic Acoustic Management - Hitachi ic35l060avv207-0 - Deskstar 60 GB Hard Drive Specifications

The idle time to Low power idle mode and Low RPM standby mode vary according to the value in Sector
Count register as follows:
When Low power idle mode is the deepest Power Saving mode,
= (x − 80h) & 5 + 120 sec (120 [ y
y
1
=N/A (the device does not go to Low RPM standby mode)
y
2
When Low RPM standby mode is the deepest Power Saving mode and the value in Sector Count
register is between 40h and 7Fh,
120 <= y <= 435
1
= (x − 40h) & 60 + 600 sec (600 [ y
y
2
When Low RPM standby mode is the deepest Power Saving Mode and the value in Sector Count
register is between 01h and 3Fh,
120 [ y [ 435 sec (default: 120 sec)
1
= 600
y sec
2
where
x = the value in Sector Count register
y = the idle time to Low Power Idle mode
1
y = the idle time to Low RPM standby mode
2
If Low power idle mode has already been enabled (i.e., y1 has been set) before Low RPM standby mode
is enabled, y1 is preserved. If Low power idle mode is disabled (i.e., y1 has not yet been set), y1
becomes 120 seconds when Low RPM standby mode is enabled.
Enabled Power Saving mode and idle time (y1 and y2) are preserved until Advanced Power Management
is disabled, the deepest Power Saving mode becomes Normal Idle mode, or a new time is set. They are
initialized with a hard/soft reset unless Reverting to Power on defaults is disabled and the devise receives
a soft reset.
11.37.3.1 Low Power Idle mode
Additional electronics are powered off and the heads are unloaded on the ramp. The spindle is still
rotated at the full speed.
11.37.3.2 Low RPM standby mode
The heads are unloaded on the ramp and the spindle is rotated at the 60-65% of the full speed.
When Feature register is 85h (= Disable Advanced Power Management), the deepest Power Saving
becomes normal Idle.

11.37.4 Automatic Acoustic Management

When Feature register is 42h (= Enable Automatic Acoustic Management), the Sector Count Register
specifies the Automatic Acoustic Management level.
FF
C0 - FEh
80 - BFh
00 - 7Fh
[ 435)
1
sec (default: 120 sec)
[ 4380)
2
--- Aborted
--- Set to Normal Seek mode
--- Set to Quiet Seek mode
--- Aborted
Deskstar 180GXP hard disk drive specifications
177