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You Can Convert the Whole Disk to GPT without Losing Data

  • Situation: I’m running Windows 7 32 bit on disk 0 and plan to install Windows 8 on disk 1. However, in the process of installation, I got the message: the selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks. Therefore, I really want to convert the whole disk to GPT without losing any data. Nevertheless, when making disk conversion in Disk Management I found the very function “Convert to GPT Disk” is grayed out. What should I do?

    How to Convert Whole Disk to GPT without Losing Data

    In Windows Disk Management, converting disk requires users to delete all existing partitions in advance, which unquestionably will result in data loss unless backup has been made. But now we recommend a lossless solution, namely asking third party free partition manager for help. And MiniTool Partition Wizard is available. By using it, users will complete conversion without deleting any data and partition, so data security can be ensured.

    How to Convert Whole Disk to GPT with MiniTool Partition Wizard

    To use this free partition manager, please download and install it on computer. After successful installation, run it to open the main window:



    In the main window disk information and partition information are shown. Please select the very MBR disk and click on "Convert MBR Disk to GPT Disk" from the left. After that, the following interface will emerge:



    Now we can see the original MBR disk becomes GPT disk, so please click "Apply" button on toolbar to apply the change to computer. After application, we can open partitions to check whether the free partition manager converts the whole disk to GPT without losing any data.

    Moreover, MiniTool Partition Wizard offers users a boot disc which can convert disk when operating system can not boot normally. See MiniTool Partition Wizard Bootable CD.