Windows 10: EFI Partitions on wrong drive

Discus and support EFI Partitions on wrong drive in Windows 10 Installation and Upgrade to solve the problem; Hi, After removing an SSD (W*Smile from my rig I discovered that my system would no longer boot and gave the error: NTDLL not found. Press... Discussion in 'Windows 10 Installation and Upgrade' started by aptmusic9, Sep 12, 2016.

  1. aptmusic9 Win User

    EFI Partitions on wrong drive


    Hi,

    After removing an SSD (W*Smile from my rig I discovered that my system would no longer boot and gave the error:

    NTDLL not found. Press CTRL+ALT+DEL to restart.

    I put the drive back and was able to boot. Attached is my disk management. I recently installed plugged in a new 4TB HDD, and I can see that it too, has had an EFI Partition now, presumably because I plugged it into Sata port 1(?)

    To be safe, I've used Windows to create a system image on drive Q: and a repair disk. The wizard said it backed up the EFI partition to drive Q as well.

    So my question is, what's the easiest solution here? Can I pull out all the drives and restore from the image onto a new SSD? Or is there an easier way using another method? I want to get all of the required boot stuff on to C:. Thanks!


    EFI Partitions on wrong drive [​IMG]


    :)
     
    aptmusic9, Sep 12, 2016
    #1

  2. Windows 10 0xc000000f

    Did you try deleting all partitions on the drive and starting a clean install? Also disable efi in the bios so there is no efi boot partition.
     
    AndrewPelecanos, Sep 12, 2016
    #2
  3. Windows 10 1709 64bit, windows image restore to a new drive fails, error 0x80042302

    Right?

    Microsoft recommends that when partitioning a disk, the EFI system partition be the first partition on the disk. This is not a requirement of the EFI specification itself. On Windows XP 64-Bit Edition and later, access to the EFI system partition is obtained
    by running the command

    The EFI partition is formatted with the FAT file system.

    Try this with command prompt to create the first partition on the drive, then try to install image without formatting NTFS partition for 10 OS.

    Go here on how to create, mount/format the EFI partition

    EFI System Partition - ArchWiki
     
    seahawks65, Sep 12, 2016
    #3
  4. dalchina New Member

    EFI Partitions on wrong drive

    Hi, good that you're familiar with disk imaging.

    The most reliable method is

    a. shrink C: so you leave enough space for the other partitions
    b. Ensure you have a disk image of your existing C:
    c. Wipe your system disk
    d. Delete any other stray Win 10 OS related partitions on other drives.
    e. Clean install Windows (same build)
    f. Replace the OS partition with that from your image (a)
    g. Run startup repair from Win 10 boot medium

    Win 10 will create partitions on other drives if there is insufficient space on the drive where you intend the OS to be installed. E.g. Disk 6 has a 450Mb Recovery partition, Disk 2 EFI as you noted.
     
    dalchina, Sep 13, 2016
    #4
  5. aptmusic9 Win User
    Bummer, any other options besides a reinstall? All I have is a windows 8 disk. Ive been reading about easyuefi.com as a possible solution. any experience with that program?
     
    aptmusic9, Sep 13, 2016
    #5
  6. simrick Win User
    Hi. You can download the W10 ISO for the re-installation here:
    Windows 10

    See: Use the tool to create installation media (USB flash drive, DVD or ISO...
     
    simrick, Sep 13, 2016
    #6
  7. dalchina New Member
    Hi, I wonder if you've understood... the ONLY reason to clean install is to create the partition structure on the one drive correctly.

    You then copy back your EXISTING OS partition as it is.

    Then your PC should work AS IT DOES NOW- programs, configuration, users, settings, everything.

    I have used this method once, and others have too. As simrick says, Win 10 installation iso's/media are freely available- for any build. Just make sure you're confident in using a disk imaging program.
     
    dalchina, Sep 13, 2016
    #7
  8. simrick Win User

    EFI Partitions on wrong drive

    As dalchina said, you can image your existing C partition, clean install W10, and then copy over your existing C partition image to your new installation and you're back to where you were, but with a clean partition structure. See if this helps explain things. It's by one of our members.
    Copy Windows partitions using Macrium - YouTube
     
    simrick, Apr 4, 2018
    #8
Thema:

EFI Partitions on wrong drive

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