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I would like to share with you the differences between a single disc and a double disc of a mechanical hard disk. I believe most people don't know much about it, so share this article for your reference. I hope you will learn a lot after reading this article. Let's learn about it!

Difference: due to the different structure of mechanical hard disk, single disk is lighter, faster and more stable than double disk, which is more suitable for users who have certain requirements for speed; compared with single disk, double disk has larger capacity and is more suitable for users with large storage needs.

Mechanical hard disk

Mechanical hard disk development has been nearly 70 years of history, development up to now, from the previous hundred schools of thought contend to now be acquired, acquisition, only a few large factories, now solid state drive began to rise in an all-round way, the market on the HDD way SSD news ups and downs, but the author believes that HDD still has a lot of market space, after all, TB-level solid state drive can not be fully popularized.

So we still need to know about HDD. Friends who are familiar with hard drives all know that mechanical hard drives are made up of multiple storage discs. We often say that single disk capacity is the maximum amount of data that a storage disc can store.

What's the difference between a single disc and a double disc?

Due to the different structure of mechanical hard disk, single disk is lighter, faster and more stable than double disk, which is more suitable for users who have certain requirements for speed. Compared with single disk, double disk has larger capacity and is more suitable for small partners with large storage needs.

The difference between single disc and double disc

Single disk capacity (storage per disk) is a very important parameter of hard disk, which determines the grade of hard disk to a certain extent. Hard disk manufacturers can increase hard disk capacity by two means: one is to increase single disk capacity, and the other is to increase the number of storage discs. However, due to the limitations of the overall volume and production cost of the hard disk, the number of discs is limited, and due to the increase of storage density, when the head and disk move at the same distance. The amount of data read (or written) will also increase accordingly, so compared with multi-disk hard drives, single-disk hard drives still have certain advantages.

Why can't you increase the hard disk capacity by increasing the disk area?

The consumer market's thirst for capacity has always been very urgent. According to authoritative estimates, the total amount of data to be stored in the world will be about 135ZB by 2025. In the face of such a huge storage demand, I believe many DIY entry netizens will ask, why not increase the hard disk capacity by increasing the disk area?

The size should not be too large.

In fact, this is a simple question that can be answered. First of all, increasing the diameter of the disc means increasing the size of the disk body, which is obviously not a feasible solution for the internal size of the chassis. Second, because of the precision of the mechanical hard disk, the distance between the head and the disc is only a few nanometers. Increasing the size of the disc will greatly reduce its stability at high speed, and even cause physical damage. The third is that the increase in size will lead to the search time of the hard disk is too long, thus increasing energy consumption makes the temperature of the hard disk rise sharply, affecting the stability of the platform, so this idea can not be realized.

The parameters that you have to look at when buying a hard disk.

At present, there are few mechanical hard disk manufacturers left, almost Toshiba, West number, Seagate, so it is relatively simple to choose and buy, just identify these values.

How can I buy a mechanical hard disk?

First of all, the capacity of the hard disk can be chosen according to their own needs, and then the rotational speed of the hard disk, in RPM units, the mainstream speed is currently 7200RPM, and part of 5400RPM, the greater the speed, the faster the transmission speed, the shorter the access time, the shorter the seek time, and the higher the transmission efficiency, and the performance is also relatively good, but the premise is that you have to put up with noise; the third is the hard disk cache, which can reduce the load on the system and improve the transfer speed. However, in the current hard disk environment, the larger the cache, the better (because there is a stacked disk). Finally, I would like to say a word about the single disk capacity, the larger the single disk capacity, the greater the track density, the more data the head can read in a week. The speed of internal transmission is faster at the same speed, so try to choose a hard disk with a large single disk capacity.

The above is all the contents of this article entitled "what is the difference between a single disc and a double disc of a mechanical hard disk?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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