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So on your computer's hard drive are again, a whole bunch of tiny magnetic particles aligned this way or this way.
因此，你的电脑硬盘是完全是,有一簇按照这种方式排列的磁性粒子。
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We're talking about like, if you didn't, even if you had all your data on your computer backed up on hard drive,
如果你没有将你电脑里的数据备份到硬盘里，
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But these days you pay for it which is why you get SSDs, you're paying several hundred dollars more.
但是现在你购买固态硬盘，需要多花费几百美元。
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It's the various programs you run on your computer along with the various data files that you have saved on your hard drive,and so forth.
是你自身这个电脑中运行的各种程序,硬盘存有的各种数据和文件，类似种种。
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All right so it has to live in RAM as opposed to the hard drive because otherwise things would be terribly slow as you know so it's much better if your programs live while they're running in RAM and they end up in what's called the tech segment.
好的，它存在内存中，而不是硬盘中,因为，否则程序会非常的缓慢,程序在内存中运行会好得多,它们在技术段,的地方结束。
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Exactly, so you might have been thought especially in years past to defragment, so to speak, your hard drive once in a while.
你可能认为需要进行,碎片整理这种操作，也可以说硬盘驱动器有时需要你这么做。
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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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This is different from the hard disk, which is where files and stuff are permanently stored.
这个和硬盘是不一样的，那是存储,文件之类的东西的。
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It's actually a much cheaper example than handing out hard drives.
比起硬盘拿软盘做例子,可能更实用一些。
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And this is because as you start writing--saving files to your hard drive, what happens is you might save this file here, then this one, then this one, then this one, but very reasonably you might go back eventually and delete this one.
这是因为当你开始对硬盘驱动器进行读写时,你可以保存一个文件到磁盘的某处，然后再一个，再一个，又一个，最后你可能回到这,并删除这一个文件。
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What the mad scientist did,in effect was wipe out the hard drive, put in the other programs from the Shelly Kagan computer, but it's still the very same computer.
疯狂科学家所做的实际上是,清理硬盘，输入来自Shelly，Kagan电脑的其他程式，但电脑还是那台电脑。
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But in hard drives where we actually have these moving platters, here is in fact, how we get from electricity and magnetism to those zeros and ones.
但是在传统硬盘中我们确实有高速运转的磁盘，这就是事实，但问题是我们如何,把电磁信号转化为0和1的。
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Good question, so what happens when you format a floppy disk or format a hard drive?
好问题，当你格式化一个软盘,或者硬盘时会发生什么呢？
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Other signals move the read/write heads to read or write data on the platters.
其他的信号移动读写头,来到硬盘中去读或者写。
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Now this is mostly irrelevant to what we're talking about except for the fact that there are magnetic particles involved and they're really small because it turns out what's inside most of your laptops and desktop computers are these things called hard drives.
其实这与我们现在谈论的话题没什么关系,除了这里的磁性粒子有关系外,它们是很小的因为它们要放在,你的笔记本电脑或者,台式机中被称为硬盘的里面。
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These in turn control the hard drive's moving parts.
这些反过来控制硬盘的移动部分。
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To do that the data travels from RAM along with software signals that tell the hard drive how to store that data.
为了能让数据从RAM中,到硬盘是要使用软件信号告诉硬盘,如何存储这些数据。
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SSDs is like using compact flash or SD cards.
固态硬盘就像紧凑型闪存或SD卡。
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