HDD

A hard disk is a magnetic disk, in which information carriers are circular aluminum plates (platters), both surfaces of which are covered with a layer of magnetic material. This plate or group of coaxial plates together with the read / write unit are housed in a sealed box to protect against dust, moisture and dirt.

The reason for writing this article was a lot of misconceptions about hard drives that are spread among the novice and experienced users. Despite the fact that quite a lot has already been written on this topic, some legends have not yet been debunked.

The hard disk is sealed, inside is vacuum. In fact, on the case of the hard drive there is a special overflow valve, with the help of which the internal pressure of the drive is equalized with atmospheric pressure. So there can be no talk of any vacuum.

If you format your hard drive frequently, it will break. No, the formatting frequency does not affect the lifespan of the hard drive. Only mechanical impact (for example, shaking) during its operation can damage the disc.

As a result of formatting, a layer is formed on the surface of the hard disk, causing the appearance of bad sectors. Neither formatting nor any other operation contributes to the formation of any "layer" on the surface of the disc. The fact is that a hard disk is a sealed device, dust hardly gets there, therefore, the "layer" simply has nothing to form from.

Frequent formatting will quickly wear out the drive and heads. This is not true. The point is that formatting is a fairly smooth process, covering sector by sector. The likelihood that with such successive smooth transitions something could be damaged is negligible.

The number of "bad" sectors on the disk increases during formatting. If there are already bad sectors on the hard disk, then their number will increase anyway. And since during formatting the program pre-checks the disk surface and notes the detected failures, the number of detected "bad" sectors is growing. However, they do not appear, but are detected by the program. We can say that as a result of formatting, we can get information about the real state of our hard drive at a given time.

You download software from the Internet - you "kill" your hard drive. No, downloading information or programs from the Internet will not affect the lifespan of your hard drive. Remember that the disk spins anyway while your computer is on. Whether you record or not does not really matter. In any case, after a certain time, the hard drive will wear out and will have to be replaced.

Bad sectors can appear on the hard disk as a result of power outages. Power outages do not affect the appearance of "broken" sectors. The fact is that in the absence of voltage in the network, the heads are automatically parked, and, therefore, they cannot damage the disk plate.

A cheap power supply is slowly and surely leading your hard drive to death. Not certainly in that way. If a cheap power supply burns out, a high voltage pulse "kills" the hard drive not slowly, but almost instantly. If a cheap power supply is not able to provide the required voltage level, then the drive will simply not function normally.

Constantly spinning up and stopping rotation of the hard drive is a sign that the power supply is not able to provide sufficient voltage at all times. If the voltage is insufficient, the hard drive simply stops. Raising the voltage to the required level will not start it - the computer will have to be restarted. Most likely, the spinning up and stopping of the disk are associated with its reconfiguration, and not with the operation of the power supply.

Loud clicks - the sound of the hard drive heads parking. No, it is more likely that such a sound is an indicator of a change in disk temperature or the result of a head hitting a plate.

The motor responsible for the movement of the heads can fail due to excessive work. This statement is only true for very old computers. Modern actuators are driven by an electromagnetic mechanism rather than a mechanical motor.

To keep the motor from wearing out, the hard drive should spin as slowly as possible. Misconception. After all, the plates unwind when the computer is turned on and continue to rotate all the time while the mechanism is working. And the hardest thing for the engine is to untwist the plates, and much less effort is required to maintain the required rotation speed. Therefore, in order not to create stressful situations for the engine, it is better not to lower the rotational speed of the disk.

Some bad sectors disappear during formatting, therefore, they can be called virtual. There is no such thing as a virtual bad sector. It should be remembered that a bad sector is a part of the disk in which it is impossible to write anything, it is impossible to read the information recorded in it. Such sectors appear on a faulty or physically damaged media, therefore, they cannot be corrected by any software method, including formatting.

Low-level formatting will help to get rid of "bad" sectors. Not. Low-level formatting only replaces bad sectors with sectors from spare tracks that are provided on any disk. The above formatting method is not capable of recovering damaged areas.

Frequent formatting improves hard drive performance. Unfortunately, this is not so - the formatting frequency does not affect the performance of the hard drive.

Do not install the hard disk vertically. Winchester can be installed vertically, horizontally, and in general - whatever you like.

When planning to install the hard drive vertically, you must format it in this position before use. No, the hard drive will work in any position. The quality of the hard drive does not depend on the position in which the first formatting was carried out.


Watch the video: Take a look inside a hard drive while its running (July 2021).