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  1. #1
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    Convert a New External Drive from MBR to GPT

    I just bought a 5 TB Seagate External drive that I know needs to be formatted as GPT. Of course it ships as MBR, I guess for the Mac folks. In a step by step explanation, how do I convert it to GPT using disk management? The GPT option is greyed out when I right click on the icon in disk management. The drive is right out of the box, so I've not done anything to it. There are no partitions, but the GPT option is still not available.

    Thanks.

    WSC3

  2. #2
    Super Moderator jwitalka's Avatar
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    Did you try the command line option listed on this page:
    https://technet.microsoft.com/en-us/...or=-2147217396

    Jerry

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    No, but I did come across that reference when I googled it. The Windows Interface part doesn't seem to match up. I don't have any partitions and I don't know what a volume is nor how to delete it. I'd like to use my mighty Windows 7 DM to do it instead of DOS. I've actually done it before, a long time ago, using DM. I just don't remember how. It shouldn't be this hard....

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    And I don't have any partitions or logical drives/volumes on this out of the box external drive. So why is "Convert to a GPT" greyed out??? It should be a one-click and be done with it operation. Do I need to just reformat this new drive to make W7 DM happy?

  5. #5
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    Ok. I solved it myself:

    A. Disk Management
    1. Delete the volume on drive.
    2. Right click on icon and convert to GPT.
    3. Right click on drive size and select New Simple Volume: Wizard pops up.
    4. Assign drive letter (Y)
    5. Assign volume/drive name “Backup 2”
    6. Perform a quick format, NTFS, Default Allocation Unit Size.
    7. Quick format takes about 15 seconds.

  6. #6
    Super Moderator jwitalka's Avatar
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    Thank you for posting your solution. It may help others.

    Jerry

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