Windows 10: Reconnected HDD won't boot but it should Solved

  1.    29 Oct 2015 #1

    Reconnected HDD won't boot but it should

    Details: ASUS M11AA desktop UEFI

    Running Win10 on an HDD, I disconnected the sata cable to it and tested out an SSD on a diff sata cable. Installed 10 on that just for fun.

    Took the SSD out, reconnected the HDD sata cable and it wont boot. The HDD is seen in the bios but in the boot menu it is not seen. I see items such as UEFI: Sandisk(my acronis usb stick), UEFI: P3 DVDRW, UEFI: Kingston(my win10 install usb stick), Windows Boot Manager but not UEFI: P2: Toshiba which im pretty sure is what my HDD was.

    Windows Boot Manager goes to UEFI setup.

    Any clues before I try Win10 repair from the Kingston stick?
    Last edited by FrostyWinnipeg; 13 Jul 2016 at 13:40.
      My ComputerSystem Spec

  2. Posts : 3,361
    W10 Pro x64/W7 Ultimate x64 dual boot main - W10 Pro Insider Preview/W7 Pro x64 - remote pc
       29 Oct 2015 #2

    Hello FrostyWinnipeg Welcome to the Ten Forums!

    If you are keeping the two flash drives plugged in try unplugging both to start or the San Disk in order to boot live from the Kingston. Instead of the Upgrade to Repair or slapping on another clean install you will first want to try a few things out like the Repair Startup tool and going to the Command prompt option run the DiskPart tool in order to have that list the drives with the List Disk command. Once you ID the correct drive and select that type in "active" to see the primary made bootable.

    The other thing you may end up doing is double checking the data cable you unplugged to be sure that is all the way in at both ended and didn't jar loose at the board end by chance. You have need a can of compressed air to blast out any dust or debris that could have got lodged in as well.
      My ComputerSystem Spec

  3.    29 Oct 2015 #3

    Well I changed CSM option in the bios from AUTO to ENABLED and that worked. Not sure why but whatever.
      My ComputerSystem Spec

  4. Posts : 3,361
    W10 Pro x64/W7 Ultimate x64 dual boot main - W10 Pro Insider Preview/W7 Pro x64 - remote pc
       29 Oct 2015 #4

    When putting the SSD did you make any change in setting at the time? That would explain why you are seeing immediate results when just going in now to make that change. At least you had a quick fix seen there!
      My ComputerSystem Spec

  5.    29 Oct 2015 #5

    No changes, a real stumper.
      My ComputerSystem Spec

  6. Posts : 3,361
    W10 Pro x64/W7 Ultimate x64 dual boot main - W10 Pro Insider Preview/W7 Pro x64 - remote pc
       29 Oct 2015 #6

    I've had a few incidents? at times when dual booting OSs and changing boot orders as well as rearranging cables between drives where one time nothing would start and then next time you suddenly saw things running normally again. On one occasion I even had the host drive's cable plugged into one of the storage drives until deciding to mark numbers on each one to show which port it was going to. Your change of setting apparently made the bios search for Legacy not UEFI.
      My ComputerSystem Spec

  7.    13 Jul 2016 #7

    Well once again it happened. Pretty much same thing although when i changed CSM to Enabled from Auto nothing happened. Reset it to Auto and dug out the Win10 DVD and booted to that. Restarted at the first window where u select country and rebooted. A new item showed up in Boot Menu...Windows Boot Manager : (P1 Toshiba) and this got me into Windows.

    Now the drive is UEFI why it shows up as P1 which would indicate legacy I dunno. Another solved/unsolved. Hopes it helps others.
      My ComputerSystem Spec


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