Hard disk

is a magnetic disk in which the information carriers are round aluminum plates (payers), both surfaces of which are covered with a layer of magnetic material. This plate or a group of coaxially located plates together with a read / write unit are placed in a sealed box to protect them from dust, moisture and dirt.


The reason for writing this article was a lot of misconceptions related to hard disks, distributed among beginners and experienced users. Despite the fact that a lot has been written on this topic, some legends are not yet debunked.

The hard disk is sealed, inside – the vacuum.

Actually, there is a special check valve on the hard disk case, with which the internal pressure of the disk with the atmospheric pressure is aligned. So there is no question of any vacuum.

If you often format the hard drive, it will break.

No, the formatting frequency does not affect the life of the hard disk. Damage to the disc can only be a mechanical effect (for example, shaking) during its operation.

As a result of formatting, a layer is formed on the surface of the hard disk causing bad sectors to appear.

Neither formatting nor any other operation contributes to the formation of any “layer” on the surface of the disc. The fact is that the hard drive is a sealed device, the dust does not get there almost, therefore, the “layer” simply does not have anything to form.

From frequent formatting, the drive and heads quickly wear out.

This is not true. The fact is that formatting is a fairly smooth process, covering the sector behind the sector. The likelihood that something can be damaged with such successive smooth transitions is negligible.

The number of “broken” sectors on the disk increases with formatting.

If there are already bad sectors on the hard disk, then their number will increase in any case. And because during the formatting the program pre-checks the surface of the disk and notes the detected failures, the number of identified “broken” sectors is growing. However, they do not appear, but are identified by the program. We can say that as a result of formatting, we can get information about the real state of our hard disk at this point in time.

Pumping software from the Internet – “killing” your hard drive.

No, downloading information or programs from the Internet does not affect the lifetime of the hard disk. It should be remembered that the disc rotates in any case all the time, while your computer is turned on. Whether you make a record or not – does not matter much. In any case, after a certain time, the hard drive worn out and it will have to be replaced.

Faulty sectors may appear on the hard disk as a result of a power failure.

The appearance of “broken” sectors power interruptions do not affect. The fact is that if there is no voltage in the network, there is an automatic parking of the heads, and, consequently, they can not damage the disk plate.

A cheap power supply slowly and surely leads your hard drive to “death”.

Not exactly. If a cheap power supply is burnt out, the high voltage pulse “kills” the hard drive not slowly, but almost instantly. If the cheap power supply is not able to provide the desired voltage level, then the drive simply will not function properly.

The constant unwinding and stopping of the rotation of the hard drive is a sign that the power supply is not able to constantly provide sufficient voltage level.

If the voltage is insufficient, the hard disk simply stops. Increase the voltage to the required level it will not start – the computer will have to be rebooted. Most likely, the spinning and stopping of the disk is associated with its reconfiguration, and not with the work of the power unit.

Loud clicks – the sound of parking the hard drive heads.

No, it is more likely that such a sound is a measure of the temperature of the disc or the result of the head impact on the plate.

The motor responsible for the movement of the heads can be rejected because of excessive work.

This statement is valid only in relation to very old computers. Modern actuators of heads are controlled by an electromagnetic mechanism, and not by a mechanical motor.

In order not to wear out the engine, the hard drive should rotate as slowly as possible.

Wrong opinion. After all, the plates are spinning when you turn on the computer and continue to spin all the time while the mechanism is working. And the hardest thing for the engine is to unroll the plates, and to maintain the necessary speed of rotation requires much less effort. Therefore, in order not to create stressful situations for the engine, it is better not to lower the disk rotation speed.

Some bad sectors disappear when formatting, therefore, they can be called virtual.

There is no such thing as a “virtual bad sector”. It should be remembered that the bad sector is part of the disk in which it is impossible to write anything down, and you can not read the information recorded in it. Such sectors appear on a faulty or physically damaged medium, therefore, they can not be corrected in any programmatic way, including formatting.

From the “broken” sectors will help get rid of low-level formatting.

No. Formatting at a low level only replaces the bad sectors with sectors from the backup tracks that are provided on any disk. The above formatting method is not capable of restoring damaged areas.

Frequent formatting improves the performance of the hard disk.

Unfortunately, this is not true – the formatting frequency for hard drive performance is not affected.

You can not install the hard disk vertically.

Winchester can be installed vertically, horizontally, and in general – as you please.

When planning to install the hard drive vertically, you must format it in this position before use.

No, the hard disk will work in any position. From the fact in which position the first formatting is performed, the quality of the hard drive does not depend.

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