iAmEros
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Q: How can I repair my Windows Bootcamp?

Hey all..

 

I tried to shrink my OSX partition today so I could use more space on my Windows Bootcamp. Surprise surprise I have no windows anymore...way I ca

 

Is there a way I can fix this? I did the "sudo fdisk" thing and my windows now shows up when I boot and hold option, but I get a message saying "no windows operating system found" or something of the sorts. I reaalllly really hope I can sort this without having to wipe it as I had stuff on there I can't replace..

 

Thanks in advance for any help, it would be extremely appreciated.

MacBook Pro, OS X Mavericks (10.9.5), Windows 7 Profession Legit Copy

Posted on Jun 12, 2015 12:34 AM

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iAmEros

Q: How can I repair my Windows Bootcamp?

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  • by Loner T,

    Loner T Loner T Jun 14, 2015 11:06 AM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 11:06 AM in response to iAmEros

    You have another option to consider, where you can re-install Windows in the main BC partition, which should preserve your previous installation as Windows.old. Windows.old can be used to retrieve your files.

  • by iAmEros,

    iAmEros iAmEros Jun 14, 2015 3:06 PM in response to Loner T
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    Jun 14, 2015 3:06 PM in response to Loner T

    Here are the screen shots:

     

    Screen Shot 2015-06-15 at 10.02.53 am.png

     

    Screen Shot 2015-06-15 at 10.03.26 am.png

     

    Screen Shot 2015-06-15 at 10.03.51 am.png

     

    Can you please explain how the reinstall works?

  • by Loner T,

    Loner T Loner T Jun 14, 2015 3:19 PM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 3:19 PM in response to iAmEros

    You may not need a re-installation. We had used 667831308 as the starting point for the NTFS volume. If you look at Advanced Volume 17 (start 686331896), it seems the most likely candidate. Can you select it and browse?

  • by Loner T,

    Loner T Loner T Jun 14, 2015 3:36 PM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 3:36 PM in response to iAmEros

    Using the start address of the Advance volume 17, the table becomes

     

    GPT 3 StartGPT 3 SizeGPT 3 EndNTFS StartSector OffsetNTFS SizeNTFS EndSector Offset (MB)NTFS(Gb)
    581489424126953658275896066833189685572936313882617982214512 41,784 149.6708951

     

    This may be worth a test.

  • by iAmEros,

    iAmEros iAmEros Jun 14, 2015 5:11 PM in response to Loner T
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    Jun 14, 2015 5:11 PM in response to Loner T

    How do I browse it? Is it within stellar? I right click but nothing happens.

     

    So I should try the gdisk again but this time using 668331896 instead?

  • by Loner T,

    Loner T Loner T Jun 14, 2015 5:16 PM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 5:16 PM in response to iAmEros

    It is faster to use this new start address and use the same Gdisk steps.

     

    In Stellar, you want to get to this screen for this specific entry.

     

    Screen Shot 2015-06-13 at 2.23.30 pm.png

  • by iAmEros,

    iAmEros iAmEros Jun 14, 2015 5:54 PM in response to Loner T
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    Jun 14, 2015 5:54 PM in response to Loner T

    I dare say you're right looking at this screenshot:

     

    Screen Shot 2015-06-15 at 12.50.58 pm.png

     

    It's stuck on 32721, hasn't made any progress for 15mins.

     

    So I should re-do the steps using this number? What should I put in for the gpt rebuild step 8, the size offset?

  • by Loner T,

    Loner T Loner T Jun 14, 2015 6:05 PM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 6:05 PM in response to iAmEros

    Use the new start address of 668331896 and the same size in step 8. The size of 313882617 appears regularly in all of your Testdisk output, so I suggest using it. The Folder Number entries should be fixable using a chkdsk once Windows can be successfully booted.

     

    If the Stellar is still running, let it continue till you get ready to reboot.

  • by iAmEros,

    iAmEros iAmEros Jun 14, 2015 6:22 PM in response to Loner T
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    Jun 14, 2015 6:22 PM in response to Loner T

    Okay I just did it, rebooted and still nothing. Here's a screenshot of sudo gpt -vv -r show /dev/disk0 and of fdisk /dev/disk0Screen Shot 2015-06-15 at 1.20.08 pm.png

     

    Screen Shot 2015-06-15 at 1.20.46 pm.png

  • by Loner T,

    Loner T Loner T Jun 14, 2015 6:46 PM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 6:46 PM in response to iAmEros

    1. Can you see files in Finder? A screen shot would be very helpful.

    2. Does the entry show up as a Bootable entry in System Preferences -> Startup Disk?

    3. If you Restart using this entry, what do you get? A black screen with a blinking cursor in top left corner?

  • by iAmEros,

    iAmEros iAmEros Jun 14, 2015 7:50 PM in response to Loner T
    Level 1 (0 points)
    Jun 14, 2015 7:50 PM in response to Loner T

    There's nothing in finder now, nor can I select it as a startup disk. I'll try restart into it now and see if the error message has changed

     

    *Edit: now message has gone back to "No Operating System Found"

  • by Loner T,

    Loner T Loner T Jun 14, 2015 8:14 PM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 8:14 PM in response to iAmEros

    Can you post the output of diskutil list and sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C?

     

    You may need Windows Startup Repair.

     

    If you have not rebooted after executing the first set of disk steps, the OS X Kernel will continue to use the cached GPT table.

  • by iAmEros,

    iAmEros iAmEros Jun 14, 2015 8:56 PM in response to Loner T
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    Jun 14, 2015 8:56 PM in response to Loner T

    Ohh so I need to do the first set of steps, restart and then do the second steps?

  • by iAmEros,

    iAmEros iAmEros Jun 14, 2015 9:00 PM in response to Loner T
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    Jun 14, 2015 9:00 PM in response to Loner T

    Screen Shot 2015-06-15 at 3.56.39 pm.png

     

    Screen Shot 2015-06-15 at 3.58.34 pm.png

  • by Loner T,

    Loner T Loner T Jun 14, 2015 9:02 PM in response to iAmEros
    Level 7 (24,855 points)
    Safari
    Jun 14, 2015 9:02 PM in response to iAmEros

    Your GPT and MBR look to be in sync, but diskutil may still have the old GPT cached. Once you reboot (after the first or second step), the GPT disk slices should align and Finder uses the GPT and the Apple NTFS driver to show the contents.

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