Windows 10: Inaccessible usb3 boot device Solved

  1. Posts : 76
    Windows 10 Home 64 bit & Windows 7 Pro
       28 May 2016 #1

    Inaccessible usb3 boot device

    Been working on this for weeks to no avail. I have Win 7 on on ssd and Win 10 on another ssd. I am not dual booting but switch to the drive I need in the bios. Using Casper 8.0, I clone the Win 7 and Win 10 to backup internal ssds. These internal backup drives have no issues booting. I also clone the Win 7 and Win 10 to LaCie usb3 thunderbolt ssd drives. This is where the problem starts
    The Win7 has no issues creating a bootable usb3 backup.
    The Win10 will not create a bootable usb3 backup.
    When trying to boot to the Win10 usb3 drive, I get the "inaccessible boot device" error then a restart.
    I have tried just about everything I can find but nothing fixes the issue.
    Any suggestions?
      My ComputerSystem Spec

  2. Posts : 76
    Windows 10 Home 64 bit & Windows 7 Pro
    Thread Starter
       13 Jun 2016 #2

    Ok, finally isolated the problem. The bootable usb backup will work on usb 2 but not on usb 3. Now, just got to figure out why the Casper8/Win10 combo does not like usb3.
      My ComputerSystem Spec

  3. Posts : 76
    Windows 10 Home 64 bit & Windows 7 Pro
    Thread Starter
       19 Oct 2016 #3

    Contacted online Gigabyte support before I installed 10 quite some time back and asked if my H67A-UD3H-B3 supported Windows 10 as I was having far too many issues. They assured me it was and the process to fix the usb issue began. Thru out the entire process, I had to constantly remind them of the issue as they would be out in far left field with suggestions that did not even pertain to my issue. Today I finally called US Support and was told that my board DID NOT support Windows 10. So much for their online tech support! Guess it is back to 7 on this computer!
      My ComputerSystem Spec


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