Convert GPT Disk to MBR Disk

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b2ap3_thumbnail_iStock_000007630870XSmall.jpgAs of the current date disks with GPT format became very popular, instead of commonly known MBR. Even though new EFI interface allows us to work with it, we can still face a situation when booting from sources other than hard disk drive is prohibited by the manufacturer. In this case you have to switch to BIOS standard mode. But operating systems still cannot work with GPT disks in this mode and upon installation you get the following error: “The selected disk is of the GPT partition style.” So what do you do? What is the solution to this problem?

It turns out that the solution is very simple. To do that we need an installation disc with operating system. Personally, I use my disc with Windows 7. Boot from it, launch console when prompted to select partition. Use key combination <Shift+10> to launch it. Having done that you will see console. Now you need to launch a command-line hard disk partitioning utility called diskpart.

After you have launched it, run list disk to see the index list of your disks. Then run select disk # and select disk you are going to work with. Put your disk number in place of ‘#’. After you have selected the disk, all operation will be executed with it.

Then clean all the information from it by running clean command. After that you can proceed to conversion.

A convert mbr command will convert GPT disk into an ordinary one.

After that you can work with disk as usual and install any operating system you want.

Besides that, you can create partitions with the help of this utility.

create partition ptimary size=n – creates a new primary partition, size ‘n’ Megabytes.

format fs=ntfs label="System" quick – quickly formats selected partition into NTFS.

active – marks partition as active.

The End.

Last modified on Friday, 22 May 2015 12:41
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Viktor S., Ph.D. (Electrical/Computer Engineering), was hired by DataRecoup, the international data recovery corporation, in 2012. Promoted to Engineering Senior Manager in 2010 and then to his current position, as C.I.O. of DataRecoup, in 2014. Responsible for the management of critical, high-priority RAID data recovery cases and the application of his expert, comprehensive knowledge in database data retrieval. He is also responsible for planning and implementing SEO/SEM and other internet-based marketing strategies. Currently, Viktor S., Ph.D., is focusing on the further development and expansion of DataRecoup’s major internet marketing campaign for their already successful proprietary software application “Data Recovery for Windows” (an application which he developed).

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