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

让我们放大读写头。

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

磁鼓持续，在其长度上布着几十个读写头。

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

就像磁鼓存储一样，磁盘也在，因此读写头必须等待正确的部到位。

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

现在让我们放大读写头和磁盘，看看数据是何以红色写入的。

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

那么，读写头里面用来检测这些磁场的部件是么？

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.

扇区的下一部是地址，这有助于读写头知道它当前位于哪一条磁道和哪个扇区上。

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

接下来，我们将详细讲解驱何使用读写头存储数据。

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，允许读写头存储和检索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.

该机有一个读写头， 可以每次读取一位数字，然后它可以执行少数几项任务之一。

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， 在这个扇区和下一个扇区之间有一个间隙，这允许读写头在写入块内容时有一定的容差。

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读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。

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，这意味着读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，表示一个1。

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.

磁场通过右侧的读写头传导， 并在尖端聚焦到一个小点，然后跨越15纳米的气隙进入磁盘。

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

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，从而能够控制读写头的确切位置， 精度在30纳米左右。

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，每个磁盘上方和下方各有一支臂，并且每支臂的末端都有一个滑块和一个读写头。

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.

这些磁道被进一步划为扇区，每个扇区中都有一个前导码或同步区，它告诉读写头磁盘的确切速度以及每比特数据的长度。

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.

为了磁化一个单一的磁性区域，相当于写入一个单比特的数据，在读写头后部的线圈中施加电流，从而在这里产生一个强磁场。

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.

这是因为读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。