Periodically disappears the hard disk on the computer click. What if the hard disk clicks and is not determined? Cleaning the contact tracks on the hard disk board

Most of the people are confident, once a knock out hard diskSo the heads are knocking, and once it is knocking, you must change them. Where to take them? From another hard disk. We will not argue about the difficulties associated with the "donor", we only note that the coincidence should not only have all the diquses and letters on the child of the germoblock, but also the stars in the sky.

The causes of the head of the heads can be a lot ...

To begin with, it is better to figure out why both they are knocking. And the knock is due to the fact that the head does not find its servers (servo-meter). It is necessary for normal positioning on magnetic disk, and further providing the necessary speed of rotation of "pancakes". If the head does not define the servometers, it begins to behave unpredictably. Its behavior depends on how the manufacturer organized the software processing of this problem. And not just a manufacturer, namely a particular firmware of a particular version. Serverozka is not. What is the problem? One option is a problem with a magnetic surface. And what problems with the surface? It is all known BAD-sectors, microcrack results, microscopes, microchroarchs and other destruction of the magnetic layer. Sudden disconnection of power, sharp movements, falls, all this can lead to the fact that the head soaring over the surface of the disk is chirknet. The temperature changes, overheating, which destroys the power of time is also creating problems with a magnetic layer.

Of course, the servo-meter may not be found and because of the problem with the magnetic head itself. If the head does not read or read the information poorly, it is not positioned in normal way, but behaves in such a way as the drive manufacturer has implemented the program. For example, she is looking for a backup track, again does not find it and in vain trying to be signed by the parking zone. We hear so familiar clicks, buzz. Do not explain how much these blows are not useful. As a result of these blows, not only the head suffers, but also when the bounce, it can cling the surface "pancake". It is not desirable to continuously observe such a process, because This is fraught with the replacement of the magnetic head block (BMG).

The next reason for extraneous sounds may be a malfunction of the so-called drive controller, the electronic board installed under the hemobalock. If there is a problem with a memory microcircuit, in which the hard disk control firmware is located, the hard drive can also behave unpredictable and "tweak". For the experiment, you can change controllers in places in two absolutely identical working disks, and what will you hear? The same knock and "tweet", although there is no doubt the heads and the magnetic surface in good, working condition, and there is a knock. Why we hear the knock instead of normal work we will not repeat, because we considered this case in the previous article.

A rather rare cause of the knock may be a fault of the preampline, located inside the humbling on the magnetic head positioner, in close proximity to the magnetic heads themselves. Which enhances the signal with further transmission to its controller. When replacing BMG, it changes respectively with the heads.

So, the reasons for the knocks:

- Controller (electronics board) disc (board elements, microprogram control)

- block of magnetic heads

- damage to the magnetic surface (damage service Information, sections of the placement of Serves)

- Others (amplifier fee on BMG, spindle, contacts in connectors installed controller from another drive)

Accordingly, options for action during recovery vary.

Note that the knock of the knock is rosy. It is always a knock, it is deadly. And it is not always necessary to throw a donor. There are situations where the Winchester needs to be "tired", and after a while he is ready, the passport is read and the possibility of access to the data appears. Much worse if the knock is immediately and continuously. This can talk about problems with the so-called "zero" or "first" magnetic head. This is a very bad case, because Reading service information occurs precisely on these heads.

The PC-3000 software and hardware complex makes it possible to operate directly with the heads, creating a so-called "Magnetic head card". The ability to turn off the heads. And if a problem with one head, and on the drive, for example, their six, that is, the chance that we can pull something, disabling the "patient" head and the necessary client The information will turn out to be there .. either relatively quickly drain information from healthy heads, and then tighten the conditions for reading the days and weeks to deduct over the damaged head. If it did not help replacing the magnetic head unit. The operation is not simple, it is important not to harm, do not break, do not drive dust. It is better to turn to a special or experience, but first to "practice on kittens". And most importantly, it is pre-at the PC-3000 to maximize all the available information on all living heads, which was not painfully painfully, if the heads "do not come down."

Computers and their equipment most often work properly. But sometimes there are defects. With all the reliability of modern technology, completely eliminate them, alas, it is impossible.

Winchesters, for example, now and then begin to tickle and knock. Normally should not be, of course. But then why different outsided sounds? Well, there would be a uniform buzz ... Clicks publishes a positioner when it hits the limiter. It is not so difficult to find these devices, it's enough to look at the Internet any diagram of a hard disk.

But for practice, much more interesting is the other question: nothing is clicking, but why. Note that the knock and clicks can occur in a working hard drive.

Yes, do not be surprised! When a temperature increases inside a completely working hard disk, the drive conducts thermalibration, that is, re-initialization of the positioning system of reading and recording blocks. Restart of electronics occurs also with unstable power supply. Finally, the working disc clicks when it goes into waiting or sleep mode, and when the disk surface is scanned, encountered into separate problem sectors.

If the hard disk is defective, the positioning system cannot obtain and / or process signals from the drive confirming the detection of its servo-reference heads. Then the caocophony occurs, capable of breaking the nerves of even the most sustained people. The knock starts as well as when the firmware is crashed. If it hangs, the normal control of the hardware filling becomes impossible.

To distinguish the "normal" click and "normal" knock from pathological is impossible without qualified diagnosis. Only professionals can figure out what is the case, and how to solve the problem!

If you started clicking the Winchester, first of all, find out whether the disc is obtained by the power supply. Replace the power supply or place the screw to another computer. Look, if there is no overheating. Install knowingly serviceable system fee. Overheating - the first reason why hDD Clicks and is not determined by the system.

If it is not possible to cope with the hard disk with its own, and it is important on it, it is important to consult professional repairmen in the shortest possible time. Otherwise, there is a risk that in very short time the data can be inaccessible. If this still happened, do not even try to restore lost information on your own - almost all programs will make it only worse.

Finally, video with basic hard disk malfunctions:

interesnie-fakti.net

Why snaps hard disk

Computer components periodically start working with failures. If you click the hard disk, most likely, you need to think about replacing the device. Sometimes this problem can be eliminated in another way.

Crunching hard disk is usually as a result of a serious problem. It is not always possible to easily determine at home. Sometimes a hard disk is fried if he wants to report an emergency. Such functionality is equipped with devices sAMSUNG.. Perhaps the drive buzzes, but at the same time retains its performance. This situation is characteristic of the equipment with a high frequency of revolutions in the process of processing large file arrays.

Causes of emergence of foreign sounds

Clicks may be a consequence of a disk breakage or occur as a result of a system failure. They are called by one of the following reasons:

The adjustment under the change in the temperature mode of the remaining components of the computer can be a factor in why the hard disk snaps. For prophylaxis, you need to measure the total temperature of the devices using special programs.

Constant reboot due to food interruptions. If the hard disk is fried and is not determined, you need to check the density of the adjacent of wires from the power supply. You also need to do if the drive suddenly did not determine the system. Hard can be connected to another power supply and check how it will work on it. If the changes does not happen, most likely it will have to be changed.

Forced translation of the device in sleep mode settings. In this case, recalibration heads. You can fix it in the system's power saving settings by disconnecting the sleep mode for the drive. After rebooting, everything will work in normal mode.

Search bied sectors in the scanning process. During operation, the hard disk makes sounds and periodically freezes. This may show a message that the device is not found or not responding.

If the drive for a long time knocking and not determined, the operation of the system is interrupted in a blue fatual error screen.

Cracking drive head or positioning system. The hard disk cracks in the process. What to do in this case? It is best to turn off the computer immediately so as not to damage the remaining components. Next, dismantle and check it on the service.

HDD control program failure. Due to the hardware failure or influence of the virus, the system cannot calibrate memory management settings. As a result, a hard disk is knocking when the positioner bends about the limiter, or the device crepts, since the system cannot receive signals from the drive heads and makes them search for marking. It will not be possible to solve this problem with a simple disk replacement, you will need to fully diagnose the computer's operating environment.

Diagnosis of malfunction

Since the reasons why the hard disk cracks may be somewhat, you need to find out what exactly causes a breakdown. You must do the following:

Check power supply. Test the device on another computer. If the device snaps and does not start, you need to contact the recovery service.

Measure the temperature of the drive while working special software. If the device clicks, the cause can be overheating. Normal temperature is approximately equal to room.

Replace the chip on the device. The refusal of the management board may cause why the hard disk clicks and is not determined. This action It is impossible to spend at home. It is necessary to contact B. service centerwhere a comprehensive diagnosis will be carried out.

What to do in case of breakdown

Winchester is designed for a limited number of overwriting cycles. For active use It will start working slower and noise. Need to prepare a spare device in advance, as well as make backup copies important files. When buying it is better to choose a small volume device than to overpay for a more capacious disk that is extended at the same speed. You can even buy two hard drive at once and use the second as a backup device. Moreover, prices for this computer element remain low.

If the hard disk makes strange noisesIt is best to take it to the diagnostics in the service center. Do not delay and hope that the breakdown will disappear. Sometimes the reason why the hard disk is noise, is its work mode with a specific file format. Technical peculiarity Some devices allow them to function in normal mode, but at the same time buzz. In this case, good decision The question of how to reduce the noise of the hard disk will be the acquisition of special soundproofing pads.

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HDDIQ.ru.

What if you click a hard drive? Why does it click a hard disk?

Clicks the hard disk and does it cease to work, reduces turns or visible problems No - all this testifies to the presence of malfunctions in the disk. Sometimes problems can be removed by themselves, but in any case, this is an alarming bell.

First of all, if such faults occur, should be prescribed by the creation backupsSince the probability of disk failure is great. The easiest way to do it is carried out important files on outdoor HDD, Ssd or downloading on cloud storage. Thus, you will protect yourself from data loss, and then you can already hope for good luck that the disc itself does not have serious damage.

What if the hard disk clicks and is not determined?

If the HDD clicks and is not able to boot, then most likely it is lost and is not amenable to recovery. Immediately, we note that repairing the hard disk is very difficult and such a job may be an order of magnitude more than buying the HDD itself, with the more modern.

It makes sense to repair the disc only if it has extremely important information on it, and it is unlikely to be able to return the work of the hard drive, but the data is restored real. Independently engaged in the withdrawal of information is not recommended for a simple reason standard programs Recovery for such a task are not intended, so they can harm.

Literally the only culprit, in the current situation, there may be a power supply. If there are failures in it, transformers burned out, the capacitors or other elements burst, then it will incorrectly work.

See also: Why does the computer sees the hard drive? What to do?

If you click a hard drive, what to do? - Check the power supply for wear, independently do it can be difficult, as a multimeter is required. But really make diagnostics in another bed:

Disconnect the hard disk, it is at the base of the hard drive not on motherboard, interested in the power wire, and not control, that is, the one that comes from the power supply;
Disconnect the CD drive;
The cable from the drive must be connected to the hard disk and check the operation.

What if Windows Modules Installer Worker loads the processor?

Sometimes it helps to determine the supplied power, probably due to some failures in a certain direction, the voltage is reduced. If you have a multimeter, then measure the voltage to them. Not always such a way helps, because the power can disappear during operation, for example, when overheated.

External hard disk Clicks - Alternative solution

Often the reason why outdoor hard The disk clicks, there is an HDD itself, but sometimes fails of other PC elements that are a link for the computer.

Try moving the loop on the motherboard itself in another connector, while cleaning it from dust or garbage residues. Restart the PC and watch the setting.

The likely culprit of problems with clicks in the hard disk is the cable itself. If it interrupts or has some significant deformations, then the loop should be replaced with a new one, perhaps everything will work.

You can also recall the situation when the cable and hard disk are loosely connected, the backlash occurs and the power disappears due to this, which is characteristic of clicks.

Sometimes clicks are associated with the overheating of the drive, especially in laptops. Try freeing the disc from all third-party covers to provide access to HDD, increased air ventilation can help with a problem.

Before moving to the inner hDD problems, We note the last, simple, but very important nuance - the hard drive fastening should be dense and horizontal. Sometimes users put it under a certain angle and the head simply clings, making the sound.

Why does a hard disk click?

If it was not previously failed to find out why the hard disk clicks, and achieve some positive result, it remains the last - to determine what specifically broke inside the disk. So for Western Digital.:

Multiple clicks are heard, after which the disk motion is slow or the sounds are not stopped, occurs periodically - characteristic of head problems;

Control hard disks Using Ashampoo HDD Control

Constant launch of the disk, but in the end it breaks down and starts again, sometimes accompanied by sound signal, spindle malfunction;
If sounds are heard, similar to the scratch, then most likely there are failure sectors;

A scratching sound or a screech on Toshiba may occur due to wear of bearings;
SEAGATE disks are observed clicks that are accompanied by a pack, which indicates damaged heads, often due to the physical fall.

In any case to achieve proper work HDD if he has any problem, it will not work hard and personally to cope with such work. The user becomes a choice or buy a new hard drive, or try to restore the old one, afterwards anyway will have to purchase HDD.

READ ALSO: Hard Drive Control Using Ashampoo HDD Control

About recovery and think it is not particularly necessary if you have a backup of important data on the cloud or on a duplicate disk.

Alas, but to delight the situation with clicks will be difficult, probably your further path will lie through a computer store. If the PC still works, but publishes uncharacteristic sounds, then be sure to create a copy of important files.

If you have any questions about "Why does a hard disk click and what to do?" You can ask them in the comments.

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Why does a hard disk click!?: [Causes

If the hard disk snaps, it may be evidence of a serious problem in a PC or laptop.

Hard disk is the main data storage device in any PC, whether it is a stationary computer or laptop.

From its serviceability and normal operation directly depends on the preservation of the data and the possibility of their recovery.

Therefore it is very important to control the operation of this device. What if the hard disk clicks, why does this happen and how to cope with this problem? This is described in the material below.

Often the appearance of outsided and nonypical sounds when the hard disk is opened with its device. Accordingly, to troubleshoot, you also need to familiarize yourself with the hard disk device.

The device can be glass or metal. From these materials, round plates are made on which a special ferromagnetic layer is applied. It is on a ferromagnetic layer directly and information is recorded.

One device may include one or more plates. If there are several of them, then they are separated by layers of non-magnetic material.

This material and these layers play an important role in the distribution of the air flow within the block. They are largely absorbed by the noise that appears when the hard drive (hard disk) appears.

Normal and abnormal sounds when working

In a fully suitable condition, the new hard drive in the sound of sounds should not be made. However, there are permissible deviations in this area. It may be quiet and short-term buzz that appears when starting the program.

However, the knocks or clicks in a good disk can not be. Because if such sounds arise, it is a reason to object to the safety of recorded information.

Also, permissible noises occur when the disk does not receive sufficient food. In this case, you need to install a new power supply or connect charger. And sometimes the disk can noise when overheating the system. Earlier in our material, we wrote about how to cope with overheating of the system with simple action - Laptop thermal paste: How to choose, replace, apply and how to clean your computer so as not to brake? Options C. free programs And manually.

In this case, you need to connect the cooler. When overheating, the hard drive may not be determined by the system at all.

However, if such problems are not observed, and the disk continues to click, then it is necessary to take care of the safety of information. Since the likelihood is that it will be unavailable soon. You need to save everything important on removable media and attribute a computer to diagnostics.

Without qualified diagnostics it is impossible to install, are dangerous or not certain clicks. There is a chance that their reasons are not so serious and easily eliminated, but it is worth a renowned for the sake of safety. important information.

Often the service wizard do not recommend using diagnostic programs and utilities to find out the status of the hard disk. The principles of their work and access to the carrier and the system are such that with some breakdowns they can only aggravate the situation. To an even greater extent, this concerns programs for debugging hard drive.

back to the menu

Why does the hard disk click or knocks? Technically, such a sound occurs when the reading heads occurs. That is, they return to the spindle, in the parking place.

Hard disk clicks for a number of reasons. The most harmless of them are:

Self-testing of the device during which the Winchester "marks" failure sectors;
The transition to power saving mode causes a hard disk shutdown (with the appropriate power saving settings);
Powerful interruptions also serve as a cause (may arise when a malfunctioned laptop battery, energy racing on the network);
Increase the temperature inside the thermoblock.

One of the most unpleasant and serious disposable causes of clicks is damage to the ferromagnetic layer or disc servosmeter. Because of this, it is positioning the reading heads. This state of affairs threatens the loss of all information stored on the disk.

Not only knocks and clicks, but the symptoms occur when the heads stop "seeing" the servo-meter due to a malfunction. They do not receive signals from it, and they start moving and "search" this markup.

As a result, outside sounds occur. Similar sounds occur in the error loading the firmware of the hard drive.

HDD brand has important. Although they are similar to them, to signal one or another, they can differently. Also the hard drive can knock after a laptop fall. In this case, this suggests that the heads failed.

Why can rig hard drive

IN hard disks Many moving machines. If you are, the probability of breakage is very high. But even a regular disk working inside the case at perfect temperatures may fail.

Problems may occur with any part of the hard disk:

Reading heads;
Spindle;
Bearings;
Magnetic heads;

Once you have heard any uncharacteristic sound emanating from the hard disk, you need to think about saving data to external media. It can be flash drives, cloud, discs, Dropbox, all that is at hand. This is definitely because the disc can be broken at any time, after which it will be difficult to return the lost data.

In the presence of valuable data, exactly, try different software and, moreover, open the disk. It is necessary to alert and think about transferring data when the disc for the first time began to make any strange sounds. Do not pull with contacting specialists, so as not to run the breakdown finally.

Good day.

At the beginning of the article, I immediately want to say that a hard disk is a mechanical device and even a 100% drive in its work can make sounds (the same grinds when magnetic head positioning). Those. You have such sounds (especially if the disc is new) can not talk about anything, another thing - if there were no before, and now they appeared.

In this case, I first recommend copying all necessary information from the disk to other media and then start the procedure hDD diagnostics and recovery of performance, files. Of course, comparing the sounds of your hard drive and the sounds given in the article - this is not 100% diagnostics, but still for preliminary results it is nothing ...

To be more clear the causes of various sounds from the "hard disk body", here is a small screenshot of the hard drive: as it looks from the inside.

Winchester from the inside.

Sounds published HDD Seagate

Sounds published by the fully suitable Winchester Seagete U-Series

SEAGETE BARRACUDA Winchester Card, caused by a malfunction of a block of magnetic heads.

SEAGETE U-SERIES Winchester Card, caused by a malfunction of the magnetic head unit.

The seagate hard drive with a broken spindle is trying to unwind.

The seagate hard drive with a laptop with a bad state of heads creates clay and clicking sounds.

The seagate hard drive with failed heads - makes sounds with clicks and a crash.

Sounds published Western Digital Winchesters (WD)

Winchesters WD, caused by a malfunction of the magnetic head unit.

WD laptop hard disk with stuck spindle - trying to unwind, making siren sound.

Winchester WD on 500GB disk with a bad head of heads - clicks a couple of times, and then stops.

WD hard drive with poor head status (molding sounds).

SAMSUNG Winchesters Sounds

Sounds published by the fully suitable SAMSUNG SV-series hard drive.

SAMSUNG SV-Series Winchesters Card, caused by a malfunction of a block of magnetic heads.

Quantum hard drives

Sounds published by the fully suitable Winchester Quantum CX

QUANTUM CX Winchester knock caused by a malfunction of the magnetic head unit or damage to the Philips TDA chip.

Quantum Plus AS Winchester Card, caused by a malfunction of a block of magnetic heads.

Sounds of hard disks MAXTOR brand

Sounds published by fully good hard drives "thick models" (Diamondmax Plus9, 740L, 540L)

Sounds published by fully good HDD "thin models" (Diamondmax Plus8, Fireball3, 541DX)

The knock of thick models (Diamondmax Plus9, 740L, 540L) caused by a malfunction of the magnetic head unit.

A knock of thin models (Diamondmax Plus8, Fireball3, 541dx), caused by a malfunction of the magnetic head unit.

IBM hard drive sounds

IBM hard drive sound without paking and recalibration, usually this happens when the controller is malfunction.

The sound of the IBM hard drive without recalibration, usually happens in the case of replacing the controller and mismatch versions of official information.

The sound of the IBM hard drive when the contact is violated between the controller and the hemobal or the presence of BAD blocks.

The sounds published by the fully effective IBM hard drive.

IBM hard drive knocker caused by head block fault.

Fujitsu hard drive sounds

The sound of the Fujitsu Winchester, with the loss of adaptive settings, is only on MPG3102AT and MPG3204AT models.

The sounds published by the fully functional Winchester Fujitsu.

Fujitsu hard drive knock caused by a malfunction of the magnetic head unit.

Assessment of the state of the hard disk using S.M.A.R.T.

As he said before, after the appearance of suspicious sounds - copy all the important data from the hard drive to other media. Then you can proceed with the assessment of the hard disk state. Before switching to a direct description of the check, start with the abbreviation S.M.A.R.T. What it is?

S.M.A.R.T. - (English Self Monitoring Analysing and Reporting Technology) - technology of assessing the state of the hard disk of the built-in equipment of self-diagnosis, as well as the mechanism for predicting the time of failure.

So, there are such utilities that allow you to read and analyze the attributes of S.A.A.R.T. In this post, I will consider one of the easiest management - HDD LIFE (as recommended to read the article on scanning HDD program "Victoria" -).

H DD Life.

Supported Windows: XP, Vista, 7, 8

What is good this utility? Probably, it is one of the most visual: it allows you to very easily and quickly control all the most important parameters Winchester. It is practically nothing to make the user (as you have some kind of special knowledge and skills). In fact, just install and run!

On my laptop the picture is the next ...

Laptop hard disk: worked with a total of about 1 years of time; The life of the disk is about 91% (that is, for 1 year of continuous operation - ~ 9% of "life" is eaten, it means at least 9 years of work in stock), Excellent performance (good), disk temperature - 39 gr. C.

The utility after its closure turns into the tray and watches the parameters of your hard drive. For example, in the summer in the heat, the disk can overheat what the HDD LIFE will immediately inform (which is very important!). By the way, there are in the settings of the program and Russian.

It is also a very useful option - this is the ability to adjust the disk "for yourself": for example, to reduce its noise and crackle, while, however, the performance will not be removed ("on the eye"). In addition, there is a setting of disk power consumption (we do not recommend that we do not recommend, can affect data access rates).

And so HDD Life warns about various mistakes and dangers. If there is too little space on the disk (well, or the temperature will rise, failure, etc.) - the utility will immediately inform you.

HDD LIFE is a warning about the ending place on the hard disk.

For more experienced users, it is possible to view the attributes of S.M.A.R.T. Here each attribute is translated into Russian. Opposite each item shows the status as a percentage.

Attributes S.M.A.R.T.

Thus, using HDD Life (or similar to the utility), you can track the important parameters of hard drives (and most importantly - to learn about the impending trouble in time). Actually, on this end, all long hDD works…

Tapping in your hard disk, this is the first sign for anxiety, and not for panic!

Hard disk knocking During work, it is bad signal. Well, if the problem is only in the power connector, where there may be bad contact due to the oxidation of the conductors or the help of the power connector.

What could be the causes that call the hard disk:

Power fault
Mechanical disk inside
Hard disk overheating
Failure failure
Not the correct position of the disk

Methods of troubleshooting:

1. Let's start in order from the electrical power supply of the hard disk

Interior of the connector power SATA There must be flat and not curved to the gun, otherwise the contact may be weak and during the operation of the computer periodically disappear, which can cause knock in a gesting disk And even the sound of the launch of the disk (when the disk stopped and re-spinning). Such a plug is recommended to change! Also, in preventive purposes, it is recommended to clean the contacts inside the plug with a small piece of non-rough emery paper or scratch the screwdriver each contact separately, in order to remove the oxidation. Do not forget to turn off the power of the computer !!!

In four-contact power connections, such as shown in the picture below, there may also be problems that are much less likely in my practice. In them, the cup of all has to simply adjust the round contacts a little inside, so that the pin contacts of the hard disk are tightly touched with them.

2. Mechanical wear of the disk indoors.

The mechanical hard disk malfunction is based on a fall or concussion, especially at the moment when it is in a working condition. In this situation at home, something to do without a special tool, skills and sterile situation, will not work. In such cases, it is necessary to quickly buy a hard disk for replacement, and copy all the information on it until a good drive can still work.

3. Hard disk overheating.

Most often, the hard drive overheats in the summer. With overheating of the hard disk, it is not so difficult to fight. You can buy special cooling systems for disk, something like the one in the picture below. Cooling is screwed to the bolts to the bottom of the hard drive to blow the board. Cooling systems are a large set.

If you do not have a store nearby, where you can buy such cooling, you can try to twist the fan, it is a cooler, from the rear wall system Block. (do not confuse with a fan from the power supply !!!) And try folk remedies, the pliers and wire method attach this fan so that it would be as possible as much as possible with a hard drive.

4. Fire firmware.

In my opinion it is extremely rare. I heard what it may be, but never faced with such a thing and I still have no idea how it is treated :)

5. Not the correct position of the disk.

As one of the reasons, this is the location of the hard disk in the space block space. He should not hang on the wires! The disc must be installed in the place provided for it. Most often it is horizontal or vertical.