When a reverse current is sent through the voice coil, the arm is forced in the opposite direction, thereby enabling control of the exact position of the reed right head within 30 or so nanometers.

当反向电流通过音圈时，臂会被强制向相反方向移动，从而能够控制写头的确切位置， 精度30纳米左右。

The storage principle is the same, the surface of a disk is magnetic, allowing write and read heads to store and retrieve 1's and 0's.

存储原理相同，磁盘表面具有磁性，允许写头存储和检索1和0。

The machine has a read-write head that can read one digit at a time, and then it can perform one of only a few tasks.

该机器有写头， 可以每次取位数字，然后它可以执行少数几项任务之。

And finally, there's a gap between this sector and the next, which allows the read-write heads some tolerance when writing the contents of a block.

而且最后， 这区和下区之间有间隙，这允许写头写入块内容时有定的容差。

The drum was rotated continuously, and positioned along its length were dozens of read and write heads.

磁鼓持续，其长度上分布着几十写头。

These tracks are then divided into sectors, and in each sector is a preamble or synchronization zone, which tells the read-write head the exact speed of the spinning disk and the length of each bit of data.

这些磁道被进步划分为区，每区中都有前导码或同步区，它告诉写头磁盘的确切速度以及每比特数据的长度。

Like drum memory, the disks are spinning, so the head has to wait for the right section to come around.

就像磁鼓存储器样，磁盘也，因此写头必须等待正确的部分到位。

That is, of course, until the computer and write head rewrite a new bit of data to the domain by either flipping the direction or keeping it the same.

当然，这种情况会持续到计算机和写头通过翻方向或保持不变来向该磁性区域写入新的数据位为止。

After that, we'll dive into exactly how the drive stores data using the read and write head.

接下来，我们将详细讲解驱动器如何使用写头存储数据。

Next, there's a headstack assembly, with one arm above and one arm below each disc, and with a slider and a read-write head at the end of each arm.

接下来是头堆组装，每磁盘上方和下方各有支臂，并且每支臂的末端都有滑块和写头。

Now let's zoom in on the read-write head and the disk to see exactly how data is written in red.

现让我们放大写头和磁盘，看看数据是如何以红色写入的。

Let's zoom in on the read-write head.

让我们放大写头。

And when there's a low resistivity, that means there are strong magnetic fields below the read head, resulting from a change in domain orientation, and it's a 1.

当电阻率很低时，这意味着写头下方有较强的磁场，这是由于磁性区域的方向发生变化，表示1。

The next part of the sector is the address, which helps the read-write head know which track and sector it's currently positioned over.

区的下部分是地址，这有助于写头知道它当前位于哪条磁道和哪区上。

In order to magnetize a single domain, which is equivalent to writing a single bit of data, a current is applied to a coil of wire at the back of the right head, thus creating a strong magnetic field back here.

为了磁化单的磁性区域，相当于写入单比特的数据，写头后部的线圈中施加电流，从而这里产生强磁场。

First, around 2010, the orientation of the domain was switched from being horizontal to vertical, and with it the write and read heads also had to change their orientation.

首先， 大约2010年左右， 磁性区域的方向从水平变为垂直，因此写头也必须改变它们的方向。

So then, what's inside the reed head that detects these magnetic fields?

那么，写头里面用来检测这些磁场的部件是什么？

The magnetic field is channeled through the right head and focused into a small point at the tip, and then jumps across the 15 nanometer air gap and into the disk.

磁场通过右侧的写头传导， 并尖端聚焦到小点，然后跨越15纳米的气隙进入磁盘。

This is necessary because both the right head and the localized electromagnetic field are incredibly small, and by making the magnetic region more easily coerced using focused heat, we can continue to shrink the size of the magnetic domain.

这是因为写头和局部电磁场都非常微小，通过使用聚焦热量使磁性区域更容易被控制，我们可以继续缩小磁性区域的尺寸。