什么是 APM?它到底起什么作用?

什么是 APM?它到底起什么作用?

这个设定到底是什么?

在此处输入图片描述

我四处寻找节省电量的方法,在“磁盘”中看到了这个设置。我从未听说过加速计划但我怀疑这与硬盘速度有关。

那么这个设置到底起什么作用?它真的能提高性能/节省电量吗?

答案1

高级电源管理 (APM)是操作系统可用于实施多种电源管理策略的 BIOS API(函数)。例如,它可用于暂停或使计算机处于待机状态。

答案2

看看手册页对于hdparm。特别是-B开关:

   -B     Get/set Advanced Power Management feature, if the drive supports
          it.  A  low  value  means aggressive power management and a high
          value means better performance.  Possible  settings  range  from
          values  1  through  127 (which permit spin-down), and values 128
          through 254 (which do not permit spin-down).  The highest degree
          of  power  management  is  attained with a setting of 1, and the
          highest I/O performance with a setting of 254.  A value  of  255
          tells  hdparm to disable Advanced Power Management altogether on
          the drive (not all drives support disabling it, but most do).

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