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硬盘的内部是什么

What's inside of a hard drive?

The hard drive has been the main storage device in computers for decades now.
几十年来 硬盘一直是计算机的主要存储设备
Do you ever wonder what’s on the inside?
你想过它内部是什么吗?
Hard drives are sealed so that no dust can get inside
硬盘是个密封体 所以灰尘进不去
once you take yours apart
一旦你拆开你的硬盘
it most likely will not work anymore.
它很可能就不工作了
The platters is where the information is stored.
盘片是存储信息的地方
Both the top and the bottom of each platter is used
每个盘片的上下两面都会被使用
so it can store as much information as possible.
这样它就能存储尽可能多的信息
The actuator arm is how it reads and writes information.
传动臂是用来读写信息的
They never actually touch the platters
它们不会真的触碰到盘片
but you’d need a microscope to actually see that.
不过你需要用显微镜才能看清
It moves so fast that the human eye will have trouble keeping up with it.
它移动的很快 肉眼很难跟上它的速度
The platters are split up into tracks.
盘片被分成磁道
and each track is split up into sectors.
并且每个磁道又被分成扇区
When you read or write to the hard drive
当你读写硬盘时
the actuator arm must find the right track.
传动臂必须要找到正确的磁道
And the platters must rotate
盘片要旋转
so the right sector is underneath the arm.
这样正确的扇区才会转到传动臂下方
It only takes a few milliseconds for this to happen.
这只需要几个毫秒就可以完成
This may seem fast
这可能看起来快
but compared to newer technologies this is much slower.
但与较新的技术相比却慢多了
In recent years the hard drive is being replaced by the SSD –
近些年来硬盘正在被SSD——
also known as the “Solid State Drive”
也即“固态硬盘”所取代
These have no moving parts on the inside
它们内部没有活动部件
which means they are faster, smaller, and use less power.
这就意味着它们更快 更小并且耗电更少
However, SSDs are still a lot more expensive than hard drives.
然而 固态硬盘比硬盘要贵很多
How long before the hard drive is obsolete?
还有多久硬盘会被淘汰掉?
Only time will tell…
只有时间会告诉我们……

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视频概述

主要介绍了硬盘的重要组成部分,以及简要说明了硬盘和固态硬盘的区别

听录译者

收集自网络

翻译译者

Pervee

审核员

审核员 V

视频来源

https://www.youtube.com/watch?v=n6uPALWAyxc

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