D disk disappeared, healthy partition

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  1. Posts : 5
    windows 10
       #1

    D disk disappeared, healthy partition


    Hello,

    for some reason today mi D disk simply disappeared (disk 0). As you can see in the screenshots I can't change the name, it's a healthy partition, and I also tried refreshing and everything, still nothing. It shows as a normal disk in "disk management" but not in "This PC" (the last screenshot). What's the problem here? Thanks.
    D disk disappeared, healthy partition-img1.png
    D disk disappeared, healthy partition-img2.png
    D disk disappeared, healthy partition-img3.png
      My Computer


  2. Posts : 42,945
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #2

    It seems it's lost its drive letter- have you tried assigning one? You appear to be selecting an EFI partition in the screenshot. Those options are greyed out if I try that with my EFI partition.

    The other oddity is you appear to have 2 EFI partitions.
    Are you sure your PC boots if Disk 0 is not present? (I.e. are all partitions for Win 10 actually one 1 disk?)

    You also seem to have little free space on C: - certainly not enough for any next Windows upgrade (25Gb min probably needed).
      My Computers


  3. Posts : 5
    windows 10
    Thread Starter
       #3

    dalchina said:
    It seems it's lost its drive letter- have you tried assigning one? You appear to be selecting an EFI partition in the screenshot. Those options are greyed out if I try that with my EFI partition.
    I'm only able to change the Windows(C:) drive letter, all the rest are greyed out.
    D disk disappeared, healthy partition-img4.png

    The other oddity is you appear to have 2 EFI partitions.
    Yes, there are 2 EFI partitions. Is that a problem?

    Are you sure your PC boots if Disk 0 is not present? (I.e. are all partitions for Win 10 actually one 1 disk?)
    I don't know. What do you recommend me to do?

    Some additional information: a few months ago I installed xubuntu on my laptop, and I had to do some changes to the partitions, after using said OS for a few weeks I tried to zip a file in my desktop using the terminal, my laptop suddenly got frozen and reversed back to windows (it completely erased xubuntu, I suppose a critical error or something happened). After that I didn't make any change whatsoever, I've been just using Windows10. I actually never understood what happened.
      My Computer


  4. Posts : 42,945
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #4

    If you notice, your nominal D: partition does not have a file system shown.
    Is there anything important on it - do you have a backup for example a recent disk image?
    (Routine disk imaging is recommended here endlessly - e.g. Macrium Reflect (free) ).

    Please post a screenshot of your partitions using a 3rd party partition manager. This should show 1 other small partition too.
    E.g. Minitool Partition Wizard.

    Wrt your Linux experience this is interesting and similar:
    How do I find out which EFI system partition is in use by Windows 10? - Super User
      My Computers


  5. Posts : 5
    windows 10
    Thread Starter
       #5

    dalchina said:
    If you notice, your nominal D: partition does not have a file system shown.
    Is there anything important on it - do you have a backup for example a recent disk image?
    (Routine disk imaging is recommended here endlessly - e.g. Macrium Reflect (free) ).

    Please post a screenshot of your partitions using a 3rd party partition manager. This should show 1 other small partition too.
    E.g. Minitool Partition Wizard.

    Wrt your Linux experience this is interesting and similar:
    How do I find out which EFI system partition is in use by Windows 10? - Super User
    No, I don't have a backup, but there was nothing important on it.

    D disk disappeared, healthy partition-img5.png

    Maybe this is the problem? I double clicked the Disk 1 EFI partition and there's an Ubuntu folder:
    D disk disappeared, healthy partition-img6.png
      My Computer


  6. Posts : 42,945
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #6

    Yep, there you can see it's EXT4 not NTFS.

    You can now also see all 4 partitions of your Win 10.

    You can now deal with that partition appropriately.

    You should not have 2 EFI partitions.. the spare one can be deleted - the one on Disk 0.

    Then you need to consider the lack of free space on C: - the disk isn't so large. There's a tutorial on recovering space on C:
      My Computers


  7. Posts : 6,297
    Windows 11 Pro - Windows 7 HP - Lubuntu
       #7

    Why do you have a Linux partition on drive 1?
    If you want to run Linux don't delete the EFI partition or it won't boot.

    As you have a Windows boot loader on disk 1, I suggest you disconnect drive 1 from the MB (SATA or power cable) and try to boot Windows from disk 2. If it doesn't boot, it can be that the boot loader of disk 2 is on EFI partition of disk 1
      My Computers


  8. Posts : 5
    windows 10
    Thread Starter
       #8

    dalchina said:
    Yep, there you can see it's EXT4 not NTFS.

    You can now also see all 4 partitions of your Win 10.

    You can now deal with that partition appropriately.

    You should not have 2 EFI partitions.. the spare one can be deleted - the one on Disk 0.

    Then you need to consider the lack of free space on C: - the disk isn't so large. There's a tutorial on recovering space on C:
    Okay, so I erased the partition, but now it's Unallocated. Should I apply "Wipe partition"? I want to be able to use the 900gb one.

    D disk disappeared, healthy partition-img7.png


    Megahertz said:
    Why do you have a Linux partition on drive 1?
    If you want to run Linux don't delete the EFI partition or it won't boot.

    As you have a Windows boot loader on disk 1, I suggest you disconnect drive 1 from the MB (SATA or power cable) and try to boot Windows from disk 2. If it doesn't boot, it can be that the boot loader of disk 2 is on EFI partition of disk 1
    Thanks but I don't want to use Linux right now.
      My Computer


  9. Posts : 2,189
    Windows 10 Pro 64-bit v22H2
       #9

    Select unallocated space and select create partition
      My Computers


  10. Posts : 42,945
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #10

    If you wish to make use of the entire disk, delete the EXT4 partition and make use of the entire disk.

    You have a decent partition manager, so you can do that readily.

    And as I said, do make sure you can in fact boot entirely from your Windows system drive just to be safe.
      My Computers


 

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