UEFI boot order of disks is not correct


  1. Posts : 516
    Microsoft Windows 10 Home 64-bit 18363 Multiprocessor Free
       #1

    UEFI boot order of disks is not correct


    I am confused. My machine, MSI Titan GT80S SLI "Skylake" sometimes takes over a min to boot and sometimes just 30 seconds, weird. I wonder if the boot sequences as defined in UEFI has something to do with it.


    The boot order does not look right. The first disk that appears there, 860 EVO, is not the primary boot disk. Neither is the second one, PM951. The one at the bottom (option 5 and 6) is PM981 that is the primary Win10 boot disk and that defined in the bcdedit.
    However, the machine boots just fine. Why is the boot order what it is?



    Does this correct?













    This is how the it's seen in Disk Management. PM981 is the disk 0 or C:. That's the primary boot disk.


    Should it not show up in the UEFI as the first disk (option 1 and 2)?













    This is how bcdedit looks (Via EasyBCD)





    And that is the actual boot menu resulting from bcdedit configuration. It is correct.
    There are 3 bootable disks in the system right now, the boot disk can be selected by scrolling up/down and hitting enter. All that works but that still raises the question why in UEFI the primary boot disk is not choice 1 which is the top, or default choice here. Could it be that the machine tries all the options until it gets to the correct one and that explains the slight timeout at times?


      My Computer


  2. Posts : 37,679
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #2

    Hi, 3 of your disks have EFI and Windows Recovery partitions present, implying they have been configured as system disks at some point in their life.

    How many installed OS's do you believe you have on your PC? If 3, select the one you want.
    Last edited by dalchina; 10 Feb 2019 at 01:41.
      My Computers


  3. Posts : 17,832
    Windows 11 Pro
       #3

    Why don't you just change the boot order in UEFI settings to match what you want?
      My Computer


  4. Posts : 516
    Microsoft Windows 10 Home 64-bit 18363 Multiprocessor Free
    Thread Starter
       #4

    I will try that.
      My Computer


  5. Posts : 3,948
    Windows 11 Pro 64 Bit 22H2
       #5

    Disk 2 Drive S: has lost it's table of contents and the drive is now showing as RAW. Plus you have Unallocated Space of 131 GB's. You can use Recovery tools if there is information on the S: drive you want to recover.
    You also can Extend the G: and the H: drive into the Unallocated Space if you like
      My Computer


  6. Posts : 516
    Microsoft Windows 10 Home 64-bit 18363 Multiprocessor Free
    Thread Starter
       #6

    I went into UEFI, readjusted the boot order of drives and it booted into the wrong drive. There are several bootable drives in the system. The wrong drive didn't have any of the BCDedit settings, so I created some. Rebooted and now the boot sequence is correct.

    however it still sometimes takes up to 2 minutes, it hangs in the MSI prompt. Then once it gets past that and gets to the menu where I select the OS, it boots in 15 seconds.
      My Computer


  7. Posts : 37,679
    Win 10 Pro (22H2) (2nd PC is 22H2)
       #7

    Hi, you can analyse the boot sequence using the Windows Performance Recorder.

    Download and Install Windows Performance Toolkit in Windows 10 | Tutorials

    If you search this forum for that name you can find examples of its use,
      My Computers


 

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