What to do if the computer does not see the disk

The computer does not see the disk. The hard drive is not determined

What to do if a computer/laptop/camera/and t.P. He does not see the disk.

This article will help you understand what to do when the computer does not see the disk. Perhaps he will give you an idea of ​​such things that you did not know about, but “heard”. The main thing is to help you take specific steps on the way of solving the problem or protect you from rash actions. So that it would be like this, please do not try to treat this text as a step.By.Step instruction. First, fully familiarize yourself with the article, think and only then start (or do not start) act.

Exclude physical problems with the external disk

At the first stage of correcting errors with connecting an external hard drive, attention should be paid to the integrity of the housing and cable connecting the drive.

Often on external HDDs there are power buttons that must be switched to the switching mode on. After an external inspection, you should pay attention to the integrity of USB ports, as well as try connecting the device to another connector to exclude the breakdown of the port itself.

Often, problems with connecting an external drive can occur due to broken USB-hubs-special devices that allows you to expand the number of ports. You should also connect an incorrectly working device to another computer. This will help to identify what is the problem. If the disk will work normally on another computer, the case lies in software errors. If the drive is also invisible on another computer, there is a high probability that it has come out of their system.

Having excluded all of the above problems, you can proceed to solving software errors.

The computer does not see a hard drive, old.

In this case, we will consider the moment when the computer does not see the hard drive that has already been installed in the system unit.

Start. Control panel. System and Safety Settings. Administration. Computer Management.

Among the list, find your hard drive and change its letter.

  • Another way is to check the disk for the presence of viruses. Use the antivirus program. Some viruses affect the display of a hard drive in a computer.
  • The third way to determine the malfunction is to go to the device manager and pay attention to how correctly the connected device is determined (the name of the device should not contain hieroglyphs and signs).
  • You can try to reinstall the drivers for USB controller.
  • Connect the hard drive to another computer, if the disk is working, then reinstall the Windows operating system.
  • Helps in this problem the cleaning of the registry and optimization of the computer. A separate article is devoted to this topic in this blog
  • Try connecting the disk through another connector. Maybe the problem is a faulty port of USB.
  • And finally, check the integrity of the cords. Perhaps poor contact due to damage.

On a note! If you notice, then at the end of each article I tell you that I published earlier. So be sure to read how to remove tweets in. As well as how to check the video card on the computer. You can also see where to download Bluetooth on a laptop for free.

As you can see, the reasons why the computer does not see a hard drive can be many. Try, I hope you will manage to eliminate this problem. I ask you to ask my questions in the Комментарии и мнения владельцев, and I will be happy to answer them. I wish you all the world!

By the way, I had a tablet on Windows, I took it just from a friend, not mine, I connected well. And then I wondered, and if Linux is standing on the tablet, whether it will see a linx, because Linux and Windows on different cores, plus the file system is different. Water is such a question, who knows, tell me) I will be grateful)

Does not see the computer, but does not see Windows, this is, and this is, as they say, two big differences. Когда комп не видит диск, то его нет ни в загрузке, ни в управлении дисками.

Greetings, Alexander! I try to call articles as people understand this. After all, they set these requests in search engines)

The computer does not see a new hard drive. It was my request to the search engine) thanks to the author. I’m just not a “thousand programmer” and the article helped me.

Thank you for the article, helps.I forget where to look for after the reinstall)), usually everything is in place.

Thanks. Very helped out. The computer did not recognize the disc due to the fact that the letter was not assigned to him! Thanks.

Good evening, Egypt! The article, of course, is useful, but it is not suitable for my problem. Such a thing, an external drive (Western Digital My Book World Edition 1TB) over the past couple of weeks of life, has disappeared and appeared at times and appeared. Once he generally stopped appearing, both in the “Disks Management” and in the BIOS. Controller (PCB Board) was covered, sure. The restoration of the system did not help. I connected it directly (instead of a drive) and it appeared in the BIOS, the system automatically installed the desired driver and it also appeared in the “Disks Management”. And in the conductor it is not there and in the playlist in WMP only those MP3 files that are in it are not lost. For several days I have been looking for and reading different forums and articles, I have not found a solution to such a problem. It does not work to change the letter, this option is not displayed with the right click on the disk, unlike the main disk from. What to do? Windows 7, ASUS P6T, Intel i7 920, GeForce GTX285, Antec EA-500 PS PS: In it I have the necessary information.

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Either the hard drive is slowly dying, or the box in which the hard drive sits is inoperative. Try to check the performance of the hard one by connecting it to another computer.

It is not clear why you wrote it. I already wrote that the controller was covered and if I connected it directly to the computer, then the disk is no longer in boxing. There is no second computer, they stood out of the basement.

The computer does not see the external hard drive connected via USB

And what to do if the computer does not see a hard drive connected via USB? Almost everything is the same as mentioned above. The only difference is that in BIOS we check whether USB controls are included. In Award BIOS it is USB EHCI Controller, USB EHCI Controller, USB Keyboard Support, USB Mouse Support and Legacy USB Storage Detect, AMI Settings of Advanced. USB Configu.

The external hard drive may also not be visible due to problems with USB ports. Their serviceability also needs to be checked.

Lack of power is another reason why the external drive may not be recognized by the system. Do not use extension cords if possible, the connection itself must be made through the port on the back panel. If there is such an opportunity, use an autonomous power source when connecting discs, this will increase the stability of the drive. And the last. The external disk may not be recognized by Windows for the same reasons why the system does not see flash drives and other equipment connected by USB devices. With the article “The computer does not see a flash drive”, perhaps you will find a lot of useful things for yourself.

Why does the computer not see the discs

So it has been so far that a person has more and more trusting information not to paper media, but to various digital, magnetic and electronic devices. If their reliability is a rather controversial question, then the number of useful and diverse information they accurately contain more. And in terms of convenience they also have a good advantage. But what to do if the computer does not see a disc with our data?

And it doesn’t matter what it is: an ordinary hard drive or a portable external, or CD and DVD in a drive. Why this happens, and what to do in such a difficult and unpleasant situation, we will tell in detail in this article.

If an operating system is installed on it, then, as a rule, when the PC on the screen is turned on, it will be possible to find inscriptions (but not necessarily): “Operating System Not Found”, “Disk Boot Failure. INSERT System Disk and Press Enter or Missing Operating System.

Regardless of what exactly is written, it means one and the same thing: there is no loading device.

computer, does, disk
  • HDD out of order. Let’s start with the worst. In this case, the Winchester is not displayed in BIOS and does not fully show signs of life (no sounds), or vice versa, it makes noise too much (crack, squeak, beeps, knocking, etc.D.). With this scenario, you will have to simply go to the store for new hard drive and hope that in specialized computer services you will be able to restore your data with NDD.

Such a breakdown can occur due to inaccurate circulation during operation (shots, shaking, mechanical influences), due to the closure inside the system unit, due to factory marriage or conventional wear.

  • Problems with huts of connection. Perhaps the most popular reason why the computer does not see a hard drive. It is necessary to check and, if necessary, replace the bindings of the connection (power and data). They could oxidize or damaged contacts. The device in BIOS will not be displayed.
  • The BIOS settings are lost. In this case, the hard drive is determined, but the computer is configured to download from another device. This can happen due to error when setting up BIOS or inexperience in this matter. The best option would be to reset the BIOS system to settings factory settings. You can do this in the integse itself, or taking out the battery from the motherboard.

This can also happen due to the fact that the battery of the village and the settings themselves are automatically discarded after each power turning off. Then you need to change the battery for a new. How to do this we told in this article. After that, you need to adjust BIOS re.Configure.

  • If your PC is already quite old, then it can use the IDE HDD standard. On such devices there is a special jumper that is responsible for the operating mode: Master (main) or slave (subordinate). If you install it in an incorrect position, then the computer may not see the hard drive. If no one has opened your system unit and touched anything there, then it is unlikely that the reason is.
  • The motherboard is faulty or the connector on it. It rarely happens that problems with the motherboard appear precisely in connecting HDD. Nevertheless, this also happens. If none of the previous points has helped, then perhaps this option you have. Repair “Motherland” expensive and troublesome business. Therefore, in most cases it is easier to buy a new.
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The difference from the previous paragraph is that you use HDD not as a system, but as a second hard drive and simply store information on it. It’s not about the external HDD connected via USB. Read about it a little lower.

In such a situation, you will not find any inscriptions on the screen, but all the points described in the previous section plus several of their. Briefly repeat the material traveled in more detail we will describe new points.

  • PC stopped seeing the second hard drive, t.To. He is faulty.
  • Problems with huts of connection.
  • BIOS is not correctly configured.
  • If the IDE standard is a hard drive, then you need to check the “jumper”.
  • Motherland problems.
  • Does not pull the power supply. The case when too many devices are connected, and the power of the BP is too small. And he simply does not have enough of him. You need to either turn off excess equipment, or change the power supply to a more powerful. Here you can read how to independently calculate the power of the power supply for home PC.
  • If you use the Mobile Rack tray to connect the second HDD, that is, the probability that it is faulty. Check the connection directly.
  • The file system is damaged or not asked. A rather frequent answer to the question why PC does not see the second hard drive. If the Hard is new, then before use it must be formatted. How to do this, we told here. If already used before, then perhaps the file system has flown up “. To save data, it is better to contact the service. If the information does not matter, then you can try to format and most likely it will work normally.

From two cases discussed in the article earlier, there are some differences. The portable Hard is connected not to the motherboard and power supply, but by means of the USB port.

  • The device itself is faulty. The most common reason why the computer does not see a removable external hard drive. There are falls or just careless treatment during carrying or using. All this can quickly disable HDD. If the data is not needed, then we buy a new.
  • USB cable. Check whether the PC is determined by a portable disk with another cable. You can take it from another device. They are identical.
computer, does, disk
  • The USB port is faulty. Try connecting the device to another port, for example, in the one in which a regularly operating device has already been connected.
  • Not installed drivers for USB 3.0. If you connect an external HDD to the USB 3 port.0 and the computer does not see it, most likely you have not installed a driver. Unlike USB 2.0. For a new generation, a separate installation of the driver is required, t.To. There is no Windows in Windows.
  • Features of the BIOS setting. The system can be tuned in such a way as not to determine any external devices. Check the settings or reset them to the factory.
  • Not enough power power supply. It happens extremely rarely.
  • A controller failed. A removable hard drive is essentially a regular HDD (most often for a laptop), which is placed in a “box” and through a special controller can be connected to a USB, and not to the motherboard. It happens that this controller itself breaks. You can try to open the “box” and pull out the hard drive from there. After that, try connecting it directly to the “motherboard” and the power supply.

Mechanical damage to contacts, wires or ports

It is not necessarily that the problem has a systemic nature. Quite often, the malfunction consists in the breakdown of one or another component of the hard disk. Check it is quite simple, just find another cable and change it. If at the same time the hard drive began to work, then you found the root of the problem. Similarly, the procedure is done in the case of other similar malfunctions. Try using another connector for connection or change wires. Often the culprit of the breakdown is an inexperienced user who simply incorrectly or did not completely connect the hard drive to the computer.

Problem in the hardware PC

If a working HDD or SSD is not recognized at the BIOS (UEFI) level, first of all, make sure that its connection, integrity of connectors and connecting cables:

  • Disconnect the computer and try connecting the SATA train to another port. Of course, the train must be obviously serviceable.
  • Make sure that there is a voltage on the cable power connector (by connecting another device to the cable or measurement with a voltmeter).
  • If the drive is connected through an adapter of any type, if possible, connect it directly.

For problems with the SATA hard drive at the old PC, check whether the SATA controller in the BIOS settings is included: the SATA Controller option (Onchip Sata Controller, Onboard Sata Controller) should be in Enable mode.

computer, does, disk

With connection and settings, but the disk is not visible? Then do the following (the previous step did not help, move on):

  • Reset BIOS (UEFI) to default, after which install the necessary settings again.
  • Update BIOS (UEFI).
  • Temporarily replace the power supply. Perhaps he is faulty or does not give out sufficient voltage along a 12-volt line.
  • Disconnect from the motherboard everything except the problem disk and equipment necessary for loading the machine (this is a processor with cooler, memory, video card, keyboard, monitor and power supply). The reason may be an electrical malfunction of a device.
  • Alternately replace the remaining devices with obviously workers.


In 70-80% of cases, this will solve your problem. And if not, then the reason for the lack of effect is most likely a malfunction of the motherboard or individual incompatibility of devices. The last factor is rather from the field of exotic, but also “takes place to be”.

Private cases

I talked about the main reasons and methods for solving the problem. Now we consider specific situations that often arise among users Windows. These are the most asked readers’ questions.

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The computer does not see a hard drive via USB

External hard drive connected via USB can also not be determined by the system. There are 4 reasons for this:

    Nutrition. Some external hard drives require additional power, so they should be connected directly, and not through the branch. Otherwise, the device will not have enough energy, and it just won’t start. Connect the device separately from all other devices. Double USB wires connect to the laptop with both ends.

computer, does, disk

A hard drive in BIOS is not determined

BIOS is responsible for setting up the motherboard and equipment connected to it. If BIOS does not see HDD:

  • Inspect contacts and jumpers. Their damage can affect HDD determination in BIOS.
  • Check the SATA train. It can be torn or his contacts were oxidized.
  • Check the system time. If the date is incorrect, this is an indicator of the failure.
  • If nothing helped, drop the BIOS settings to factory. The easiest way: turn off the power source, remove the battery on the motherboard. Wait 25 minutes, turn on the computer, insert the battery in place.

The computer sees a hard drive, but does not open

  • No drivers. Download suitable drivers and install them on the computer.
  • The letter is not set. Set the letter in the “Disks Management” section.
  • Damage or lack of file system. Restore the file system. Format the disk.

The computer does not see the entire volume of the hard disk

This can happen for several reasons:

  • You are incorrectly counting HDD capacity. For example, a hard drive for 1 TB will show 931 GB.
  • The old motherboard does not support such a volume.
  • Not the entire hard drive is marked.
  • The HDD volume is more than 2 TB, and you have the type of section of the MBR or 32-bit version of the OS.

Now your PC will display the entire HDD volume.

If there was no unreasonable space on HDD, check the file system. Modern devices should have NTFS, not FAT32.

The compatibility of the model of the motherboard and the hard disk can be found on the manufacturer’s website.

For large modern hard drives, check the compliance with the requirements:

  • Mother should support EFI BIOS (UEFI).
  • 64th discharge operating system.
  • The hard drive is converted into the GPT sections table with a volume of more than 2TB.

To check the first requirement, press Winr, enter the MSINFO32 command and click Enter. In the window that opens, find the line “BIOS mode”: if it is indicated as EFI (UEFI), then the computer works in the right mode.

You can find out the sections table in HDD properties. To do this, go to the “Equipment” tab, highlight the right device and click “Properties”. There, go to the Tom tab and click “Fill”.

  • Open the “Start” menu. “control panel”;
  • Select the “Administration” section;
  • Find the section “Computer Management”. “Disks Management”;
  • Select the desired hard drive. Marking style (MBR or GPT) is made during its initialization.

You can change the marking right in Windows only at the logical disk. HDD properties on which the running system is located can only be changed in BIOS/UEFI. After the changes, you will need to reinstall the OS.

The computer does not see a hard drive after PlayStation 4

Winchester in the Play Station 4 console has an Exfat or FAT32 file system. A computer with Windows 7, 8, 10 is used mainly NTFS. Therefore, PC may not see HDD after PlayStation 4. To use on a computer correctly format it.

The action algorithm is this: Winr → Diskmgmt.MSC → Choose a disc with PlayStation 4 → click “Transforming into MBR disk” → Create a new volume in the NTFS file system calling it the right letter.

Read information from the PlayStation 4 disk on the computer with standard means due to encryption.

The computer does not see a hard IDE disc

The operation of devices with an old IDE integust is different from SATA. The computer needs to know which of the hard drives is the main one (Master), and which subordinates (SLAVE).

The mode of operation with jumpers on the housing of the hard disk, next to the connectors, is adjusted. The designations of the modes are indicated on the upper sticker schematically. If the HDD is additional, put Slave or Auto.

How to Fix DVD Not Working in Windows 10

You also need to configure BIOS. In the Integrated Peripherals tab, select Master if if the disk is one and SLAVE for additional. Also check the IDE train inside the system unit:

The computer does not see 2 and 3 hard drive

If you have old HDD with an IDE integer. Read the previous section. First of all, see the jumpers and settings of BIOS.

In the case of the SATA integral, this may be caused by incorrect connection of devices. First check all the joints of the loops, are there signs of disk (noise, vibration). If everything is in order, then go to Windows to initialize HDD:

  • Launch the “Disks Management” utility.
  • In the “Perform” window disk Diskmgmt.MSC, press the Enter key.
  • Here look at the information about the discs, whether the hard drive is initialized, are there indefinite areas.
  • If the disc is black, without a file system, with the right mouse button, select the “initialize disk” menu.
  • After that, select the structure in the window that appears. I recommend using MBR for Windows 7 and GPT for Windows 8.1 and Windows 10 (provided that they are installed on a modern computer). If uncertain, choose MBR, it is suitable for everyone.
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