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Thread: A dual boot has resulted in no boot partition for Windows

  1. #1
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    Mar 2010
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    A dual boot has resulted in no boot partition for Windows

    I have approx 32 years experience with computers and it has taken me about that number of hours to successfully install Ubuntu 12.10 as a dual boot system on Windows 7 machine.
    A most frustrating experience.
    Now I find I cannot boot into Windows 7. The boot partition indicates it has a size of zero.
    In my slavish reproduction of scripts to edit 'Grub' and avoid the /cow I have obviously done something but have no idea where to turn to now.
    I have a Recovery Disk and obviously an installation disk for Windows but neither help. The 'Repair your computer' just goes into an apparent endless loop and no backup images are detectable anywhere even though I thought they regularly got created.
    As an added complication No LH bar of icons appears nor the top toolbar when I log into Ubuntu.
    Could this just be an incredible coincidence?
    Thanks in anticipation.

    Geoff

  2. #2
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    Re: A dual boot has resulted in no boot partition for Windows

    Can you please post the result of

    Code:
    sudo fdisk -l
    And perhaps, if you can. Open Gparted and take a PrtSc and post here what your partions look like.
    Ubuntu Member Always something different. Promoting Ubuntu and System 76 at TUXPC

  3. #3
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    Re: A dual boot has resulted in no boot partition for Windows

    Thanks Carl. I've been away so couldn't act immediately.
    --------------------------------------------------------------
    ubuntu@ubuntu:~$ sudo fdisk -l

    Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
    255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x2ac04469

    Device Boot Start End Blocks Id System
    /dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT
    /dev/sda2 208894 19738623 9764865 5 Extended
    /dev/sda5 208896 19738623 9764864 83 Linux

    Disk /dev/sdb: 400.1 GB, 400087375360 bytes
    255 heads, 63 sectors/track, 48641 cylinders, total 781420655 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0xc3f6c3f6

    Device Boot Start End Blocks Id System
    /dev/sdb1 63 760404644 380202291 7 HPFS/NTFS/exFAT
    /dev/sdb2 760404645 781417664 10506510 5 Extended
    /dev/sdb5 * 760404708 781417664 10506478+ bc Unknown

    Disk /dev/sdd: 80.0 GB, 80026361856 bytes
    255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x88f888f8

    Device Boot Start End Blocks Id System
    /dev/sdd1 * 63 61429069 30714503+ 7 HPFS/NTFS/exFAT
    /dev/sdd2 61429758 156301311 47435777 5 Extended
    /dev/sdd5 109795328 147931135 19067904 83 Linux
    /dev/sdd6 147933184 156301311 4184064 82 Linux swap / Solaris
    /dev/sdd7 61429760 109795327 24182784 83 Linux

    Partition table entries are not in disk order
    -------------------------------------------------------------------------------

    Hope this tells you something.

  4. #4
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    Re: A dual boot has resulted in no boot partition for Windows

    Last edited by geoffHome; March 1st, 2013 at 10:14 PM. Reason: Edited cos not sure the first effort was successful

  5. #5
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    Re: A dual boot has resulted in no boot partition for Windows

    Never knew about GParted and having trouble pasting screen image into editor. Hope the text helps.

  6. #6
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    Re: A dual boot has resulted in no boot partition for Windows

    You only show a 100MB Windows boot partition in sda, the entire rest of the drive is Linux. You do show NTFS partitions in sdb & sdd, where those your Windows install?

    May be better to see all details with multiple drives & multiple installs.
    Post the link to the BootInfo report that this creates. Is part of Boot-Repair:
    https://help.ubuntu.com/community/Boot-Info
    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  7. #7
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    Re: A dual boot has resulted in no boot partition for Windows

    http://www.supergrubdisk.org/super-grub2-disk/

    The program "supergrub2" has gotten me out of that situation several times, give it a try!

  8. #8
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    Mar 2010
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    Re: A dual boot has resulted in no boot partition for Windows

    Thanks for the response.
    Here is my Boot Report summary link:
    http://paste.ubuntu.com/5581570/

  9. #9
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    Re: A dual boot has resulted in no boot partition for Windows

    You are only showing the first two boot files:
    Vista/7 (with 7 the first two files are usually in a separate 100MB boot partition)
    /bootmgr /Boot/BCD /Windows/System32/winload.exe

    And the third is in the main or c: drive Windows install. Ocassionally script misses that file and the rest of the full Windows if partition is corrupted, but it really looks like you had Windows in sda2 and overwrote it with Linux. You can look in your other NTFS partitions and see if it has your Windows boot files.
    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  10. #10
    Join Date
    Mar 2010
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    Re: A dual boot has resulted in no boot partition for Windows

    Thanks OldFred.
    I'm sure you are correct...I deliberately targeted sda1. I thought I'd created a smallish partition specifically for Linux at the end of the original larger partition.
    Anyhow I'm pretty depressed about it all and and not sure where to turn to but I'll get out your hair for the time being. Thanks.

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