我要到硬盘电源关闭和启动它备份的方式。

I have to to the hard power shut off and start it back up that way.

youdao

硬盘电源管理给出了一些技巧，使硬盘在不必要的时候不工作，而且还能减少噪音。

A few different tricks prevent your hard drive from working unnecessarily often in Disk Power Management (decreasing noise level as a nice side effect).

youdao

由于嵌入式系统中电池电量是有限的，而硬盘功耗比较大，驱动提供了硬盘电源管理的接口，用以降低系统的整体功耗。

Besides, as the battery in the embedded system is limited and the power consumption of hard disk is high, a simple power management strategy is presented to reduce the system power consumption.

youdao

When you're working on a file, it's saving constantly to RAM but also hopefully to disc, the hard disk so you don't actually lose it if the power goes off.

当你打开一个文件，它不断地保存在内存中,但对于光盘，硬盘,当你断开电源的时候，数据不会丢失。

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