用Hitachi的Feature Tool試試看能不能改？



我的Hitachi 7k500，Hitachi網站的文件裡是有寫道這幾種idle模式


12.6.1 Performance Idle mode
This mode is usually entered immediately after Active mode command processing is complete,
instead of conventional idle mode. In Performance Idle mode, all electronic components remain
powered and full frequency servo remains operational. This provides instantaneous response to the
next command. The duration of this mode is intelligently managed as described below.
12.6.2 Active Idle mode
In this mode, power consumption is 45-55% less than that of Performance Idle mode. Additional
electronics are powered off, and the head is parked near the mid-diameter of the disk without
servoing. Recovery time to Active mode is about 20ms.
12.6.3 Low Power Idle mode
Power consumption is 60%-65% less than that of Performance Idle mode. The heads are unloaded on
the ramp, however the spindle is still rotated at the full speed. Recovery time to Active mode is about
300ms.


不過Performance Idle mode似乎沒出現在設定裡？
能設只有這幾種，Standby應該就是Feature Tool裡顯示的low rpm standby。

C0h - FEh ... The deepest Power Saving mode is Active Idle
80h - BFh ... The deepest Power Saving mode is Low power Idle
01h - 7Fh ... The deepest Power Saving mode is Standby
00h, FFh ... Aborted