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Can I GPT (Reserved) partition on drive with no OS?

  1. #1


    Posts : 32
    Windows 8 x64

    Can I delete a GPT Reserved partition on drive with no OS?


    See screenshot below. I know that I shouldn't delete the GPT reserved partition if I had an OS installed on this drive, but I don't. It's a pure data drive. I'd like to keep the J: and delete the Other partition if possible. Is this safe?


    Click image for larger version
    Last edited by jtcgiants56; 28 Apr 2015 at 18:56.

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  2. #2


    Posts : 879
    Windows 10


    Do not remove the Reserved partition.

    Click image for larger version
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  3. #3


    Posts : 2,690
    Windows 3.1 > Windows 10


    unplug or remove that drive - then verify that windows will boot..

    with that drive removed and if windows boots - you can remove the partitions from that disk 3..
    As this is disk 3 you MAY have another OS disk that has the required reserve partition that is actually being used..

    can't really say for sure what is what - because you have only shown one disk, out of several
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  4. #4


    Posts : 32
    Windows 8 x64


    Quote Originally Posted by KYHI View Post
    unplug or remove that drive - then verify that windows will boot..

    with that drive removed and if windows boots - you can remove the partitions from that disk 3..
    As this is disk 3 you MAY have another OS disk that has the required reserve partition that is actually being used..

    can't really say for sure what is what - because you have only shown one disk, out of several

    Good Idea will try removing and rebooting. I don't even have Reserved GPT on my C: drive.. I think I read somewhere it's only for UEFI BIOS installs of Windows which I don't have.
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  5. #5


    Posts : 2,690
    Windows 3.1 > Windows 10


    yes the 128MB reserve partition is created on UEFI systems..
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  6. #6


    Quote Originally Posted by jtcgiants56 View Post
    See screenshot below. I know that I shouldn't delete the GPT reserved partition if I had an OS installed on this drive, but I don't. It's a pure data drive. I'd like to keep the J: and delete the Other partition if possible. Is this safe?


    Click image for larger version
    That efi partition is there to Run UEFI/GPT so that you can use your 3TB hard drive as one partition Since BIOS/MBR only allow maximum 2 TB
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  7. #7


    Posts : 2,690
    Windows 3.1 > Windows 10


    That efi partition is there to Run UEFI/GPT so that you can use your 3TB hard drive as one partition Since BIOS/MBR only allow maximum 2 TB
    Good to know - I knew of the 2TB limit - but did not realize or even notice the 2.73TB drive size
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  8. #8


    Quote Originally Posted by KYHI View Post
    That efi partition is there to Run UEFI/GPT so that you can use your 3TB hard drive as one partition Since BIOS/MBR only allow maximum 2 TB
    Good to know - I knew of the 2TB limit - but did not realize or even notice the 2.73TB drive size
    Yep I had to look for a bit too. But I knew this was possible as my old P7P motherboard did not support UEFI but when I installed a 3 TB drive I guess window must create the UEFI GPT partitions to allow the full 3 TB partition.
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  9. #9


    Posts : 32
    Windows 8 x64


    Quote Originally Posted by Clintlgm View Post
    Quote Originally Posted by jtcgiants56 View Post
    See screenshot below. I know that I shouldn't delete the GPT reserved partition if I had an OS installed on this drive, but I don't. It's a pure data drive. I'd like to keep the J: and delete the Other partition if possible. Is this safe?


    Click image for larger version
    That efi partition is there to Run UEFI/GPT so that you can use your 3TB hard drive as one partition Since BIOS/MBR only allow maximum 2 TB
    Hmm, that's interesting you say this because I have another 3TB HD that only has a single GPT partition where all my data resides. No other partitions at all on the drive. For whatever it's worth this drive is connected through SATA while the one I took the screenshot for above is on eSATA.
      My System SpecsSystem Spec

  10. #10


    Quote Originally Posted by jtcgiants56 View Post
    Quote Originally Posted by Clintlgm View Post
    Quote Originally Posted by jtcgiants56 View Post
    See screenshot below. I know that I shouldn't delete the GPT reserved partition if I had an OS installed on this drive, but I don't. It's a pure data drive. I'd like to keep the J: and delete the Other partition if possible. Is this safe?


    Click image for larger version
    That efi partition is there to Run UEFI/GPT so that you can use your 3TB hard drive as one partition Since BIOS/MBR only allow maximum 2 TB
    Hmm, that's interesting you say this because I have another 3TB HD that only has a single GPT partition where all my data resides. No other partitions at all on the drive. For whatever it's worth this drive is connected through SATA while the one I took the screenshot for above is on eSATA.
    connections make no difference BIOS MBR only support up to 2 TB UEFI GPT does not have that restriction. Back up your data and delete the EFI partition if you think its ok, I don't I only see 1 3TB hard drive on the screen shot you gave us? Since its only a DATA drive you can convert it to MBR Mini Tool partition Wizard
    Support for Disk Drives Beyond 2.2 TeraBytes (TB) and 4K Advanced Format Sectors

    My Experience was that my none UEFI system created a GPT partition 3TB when I installed it. My system now is UEFI so I can't look to see if there is a EFI partition. That drive still has the 128mb partition another one used for back up is GPT also and does not, however my computer is now UEFI new mother board.

    Ok so my ext 3tb does not have the EFI partion and my internal one does have it I suspect that was a hold over from the last MB Agan my whole system is UEFI
    Last edited by Clintlgm; 02 May 2015 at 17:07.
      My System SpecsSystem Spec

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