We recommend just backing up the drive, wiping the data, and moving any necessary data back over. However, these aren’t officially supported by Microsoft, and you’d want to back up your data before running such programs anyway in case you lose anything. Some third-party partition management programs promise they can convert MBR to GPT and GPT to MBR without any data loss. Technically, this isn’t the only way to convert between disks. Update: Microsoft now offers an official MBR2GPT tool for converting disks from MBR to GPT without wiping them. The conversion processes below will wipe the disk of all its data and partition tables, and then you’ll convert it to the new type of partition scheme and set it up from scratch again. Before continuing, back up all the data on the disk. To convert a disk from MBR to GPT, or from GPT to MBR, you’ll have to wipe the contents of the disk first.
How to Convert Between MBR and GPT: Back Up and Wipe Your Disk If it’s an MBR disk, it will be blank under the Gpt column.įor example, in the screenshot below, Disk 0 and Disk 1 are both GPT disks, while Disk 2 is an MBR disk. If a disk is GPT, it will have an asterisk (that’s a * character) under the “Gpt” column. You’ll see a table listing your connected disks. Type the following two commands, pressing Enter after each one: diskpart list disk First, launch a Command Prompt window as Administrator by right-clicking the Start button or pressing Windows Key+X and selecting “Command Prompt (Admin).” You can also locate the Command Prompt shortcut in the Start menu, right-click it, and select “Run as Administrator.” You can also check using the standard diskpart command in a Command Prompt window.
To the right of “Partition style,” you’ll see either “Master Boot Record (MBR)” or “GUID Partition Table (GPT),” depending on which the disk is using.
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