Page 3 of 3 FirstFirst 123
Results 21 to 23 of 23

Thread: Problem grub dont start

  1. #21
    Join Date
    Oct 2012
    Beans
    12

    Re: Problem grub dont start

    Quote Originally Posted by YannBuntu View Post
    oldfred +1 (you need to fix the bootsector of sda3)


    However, i see you are able to boot into your installed Ubuntu in UEFI mode:

    Code:
    BIOS is EFI-compatible, and is setup in EFI-mode for this installed-session.
    so you probably don't need to fix the bootsector of sda1.

    So i would:
    1) fix the bootsector of sda3 as described by oldfred
    2) reboot the PC, in the GRUB menu choose the "Windows UEFI" entry, and tell us if it boots Windows or not.
    This is what i got trying with EFI GPT and select the sda3

    Code:
    Disk /dev/sda - 500 GB / 465 GiB - CHS 60801 255 63
         Partition                  Start        End    Size in sectors
     3 P MS Data                   468992  123254148  122785157 [Basic data partition]
    
    Boot sector
    Status: OK
    
    Backup boot sector
    Status: Bad
    
    Sectors are not identical.
    
    A valid NTFS Boot sector must be present in order to access
    any data; even if the partition is not bootable.
    
     [  Quit  ]  [  List  ] >[Org. BS ]  [Rebuild BS]  [  Dump  ]
    What I have to select to do this ??

  2. #22
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Problem grub dont start

    All you can do now is use testdisk and click on the RebuildBS. But that creates a XP type Boot sector. You then have to use a Windows 7 64 bit repairCD or USB to run chkdsk to convert it to Windows 7 style boot sector.

    I have XP but ran chkdsk from a Windows 7 repairUSB. Chkdsk worked better but it converted from XP with ntldr to 7 with bootmgr as clear text in the boot sector. You can see tath in the compare boot sector/Dump command of Testdisk. There are also other differences, but using the repairCD I was able to write a new BS.

    If chkdsk does not totally fix it then you may need to run this:

    How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and repair startup issues in Windows
    http://support.microsoft.com/kb/927392
    http://www.sevenforums.com/tutorials...ot-record.html
    Use bootsect.exe to repair XP & older or Vista/7 bootsectors - Use diskpart, then list volumes to see which drive to use
    bootsect.exe /nt52 c: *compatible* with operating systems older (XP) than Windows Vista.
    bootsect.exe /nt60 c: *compatible* with Windows Vista, Windows Server 2008 or later
    For info on UEFI boot install & repair - Updated Mar 2015:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #23
    Join Date
    Oct 2012
    Beans
    12

    SOLVED Problem

    Quote Originally Posted by oldfred View Post
    All you can do now is use testdisk and click on the RebuildBS. But that creates a XP type Boot sector. You then have to use a Windows 7 64 bit repairCD or USB to run chkdsk to convert it to Windows 7 style boot sector.

    I have XP but ran chkdsk from a Windows 7 repairUSB. Chkdsk worked better but it converted from XP with ntldr to 7 with bootmgr as clear text in the boot sector. You can see tath in the compare boot sector/Dump command of Testdisk. There are also other differences, but using the repairCD I was able to write a new BS.

    If chkdsk does not totally fix it then you may need to run this:

    How to use the Bootrec.exe tool in the Windows Recovery Environment to troubleshoot and repair startup issues in Windows
    http://support.microsoft.com/kb/927392
    http://www.sevenforums.com/tutorials...ot-record.html
    Use bootsect.exe to repair XP & older or Vista/7 bootsectors - Use diskpart, then list volumes to see which drive to use
    bootsect.exe /nt52 c: *compatible* with operating systems older (XP) than Windows Vista.
    bootsect.exe /nt60 c: *compatible* with Windows Vista, Windows Server 2008 or later
    Thanks all for the help i really appreciate this after all I can fix this only with reinstall windows and after that with the rescue boot disk fix the boot problem



Page 3 of 3 FirstFirst 123

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •