First you need to define the hard drive. A hard disk or “hard drive”, aka HDD, is used to save data. All computer files are here (there are only minor exceptions). It contains Windows 10, as well as all the information. Thus, if the hard drive is not displayed, information from it will also be unavailable.
If the system does not detect the hard drive, then you need to determine the cause.
Find out: the problem is in the hard drive itself or in the operating system.
It is required to connect the hard drive to the system unit. If the device is successfully detected, there may be a software problem, otherwise a hard drive defect.
Work with software
If after the update of Windows 7 / 8.1 to Windows 10, the operating system ceased to see the second hard drive, then the following are the best steps to fix the problem. This instruction will also help if the user has installed an HDD or SSD in the system unit, but only the BIOS sees it and the operating system explorer does not display it. And if the BIOS does not show it, then it is required to analyze the correct connection of the equipment.
“Turn on” the second hard drive correctly
It is necessary, by pressing the R keys, call the Run menu, type diskmgmt.msc. Then press Enter. The Windows 10 Disk Management utility starts. At the bottom of the window there will be an area where the disks are listed, examine the following information about them:
- “Missing data. Not initialized ”- this will be written if the physical hard disk or SSD is not displayed;
- Is there a part on the disk where it says “Not allocated”. this is in the absence of a partition on a virtually divided space;
- In the absence of the above, the RAW section and the NTFS or FAT32 partitions are displayed, they are not visible in Windows and the volume letter is not assigned. It is required to right-click on it and click “Format” (if RAW) or “Assign a letter”.
- Right-click on the name of the area and click on “Initialize”.
Video: Installed Hard Drive Computer Does Not See
In the menu that appears, define the partition structure. MBR (in Windows 7) or GPT (GUID). For Windows 10, the GPT is better.
Next, you need to right-click on the unallocated part, select “Create a simple volume”.
Follow the steps to create a volume: select a letter, determine the file system (preferably NTFS) and the number of gigabytes of space. If you do not specify how many gigabytes will be, then it will occupy all the unallocated space.
After completing these steps, a second disk will appear in Windows 10, ready for use.
Use the command line to make the second disk visible
This option is for information only and is not recommended for use. If you do not have a positive result after completing the steps above and if you are not aware of the essence of the steps below, then it is strongly recommended not to use them.
It is required to display the command line with administrator privileges, then enter the following commands sequentially:
Write on a piece of paper or remember the number of the disk that is not displayed (hereinafter. X). Run the select disk X command by pressing Enter.
If the second hard drive is not visible, then use the commands below. Caution! Files will be erased! If you need to save files on a partition that does not appear, you cannot perform the above actions. So, we enter the following commands in the console:
- clean (deletes all files);
- create partition primary (it is possible to set size = S, the size of the section in MB, if there are several partitions required);
- format fs = ntfs quick
- assign letter = D (prescribe. D).
complex operations can be done through the command line, but it is recommended to use it only if you have the necessary knowledge in this area. Also, before that, you should save the necessary information in advance.
An alternative way to the built-in features of Windows is to use special partition recovery applications.