Missing Drive After MBR to GPT upgrade

  1. Posts : 4

    Missing Drive After MBR to GPT upgrade

    Recently upgraded to 5950x, gigabyte x570, win10 V21H1

    I was able to change my c drive from mbr to gpt.

    Before this happened I was able to see all 5 of my hard drives.

    After reboot and correcting the bios from legacy to UEFI I can no longer see my second nvme drive.

    My ssd and 2 HDD + nvme c drive are all visible. Windows does not recognize the drive in device manager, disk manager, or diskpart commands.

    Bios sees it no problem as well .

    I've loaded into windows recovery by holding shift and rebooting.
    While in recovery mode I go to the terminal and diskpart now sees the drive. I exit diskpart and able to cd into the drive and see all my files.

    Ive gone back into the bios and have tried every combo of CSM, legacy, UEFI Only I could think of to see if changing that would yield results.

    I removed the nvme drive and put it into my daughters computer(3600 and asus b450) and it loaded it no problem at all.

    Removable drive details has the arrow to reference of what it is before being asked.
    Missing Drive After MBR to GPT upgrade-2021-07-23_22-31-58.pngMissing Drive After MBR to GPT upgrade-2021-07-23_22-31-58.png

    Missing drive
    visible in bios, windows recovery
    not visible disk/device manager.
      My Computer

  2. Samuria's Avatar
    Posts : 6,454
    windows 10

    Is the drive mbr if so convert it to gpt
      My Computer

  3. Posts : 4
    Thread Starter

    The drive that is missing is GPT already.
      My Computer

  4. spunk's Avatar
    Posts : 3,196
    Windows 10 Pro 64 Bit 20H2

    AST ASM1156-PM is a USB-SATA controller. Do you have a USB Enclosure for your NVME drive? The controller is showing with no drive attached.
      My Computer

  5. Posts : 4
    Thread Starter

    Negative, that is a hot swappable external dual drive bay.

    The NVME is in the 2nd of 3 slots on my board.
      My Computer

  6. spunk's Avatar
    Posts : 3,196
    Windows 10 Pro 64 Bit 20H2

    Yes, but the pictures you posted pointed out Disk 3, which is the External Bay.
    Boot into Setup (Bios) go to System Information which will list all of the drives on your computer.
      My Computer

  7. Posts : 4
    Thread Starter

    eclonser only supports hdd/sdd and was turned off. so 0 worry there it was more as a ref this drive is this USB not the actual nvme drive.

    as for the BIOS it and win recovery see the drive and can CD into the files.
      My Computer


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