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Q: Boot camp lost after upgrading to Yosemite from mountain lion

Screen Shot 2557-11-10 at 10.28.11 PM.png

I lost my windows7 boot camp after I upgrade to Yosemite from mountain lion. When I press ALT when rebooting there is no more alternative to boot for window anymore. I did read some thread about this but my case is different since when I tried to type 3 steps(diskutil.......etc)  as LonerT user answers it did not work. The attached files here are what I faced with. Please help. I have a lot of important files in windows

Screen Shot 2557-11-10 at 10.30.52 PM.pngScreen Shot 2557-11-10 at 10.31.18 PM.pngScreen Shot 2557-11-10 at 10.32.13 PM.png

MacBook Pro, OS X Yosemite (10.10), macbook pro

Posted on Nov 10, 2014 1:38 PM

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Q: Boot camp lost after upgrading to Yosemite from mountain lion

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  • by Loner T,

    Loner T Loner T Jan 15, 2015 4:37 AM in response to Eugeniu_K
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    Jan 15, 2015 4:37 AM in response to Eugeniu_K

    Eugeniu_K wrote:

     

    Did you had a chance to review the output above?

    Apologies. Did not get a chance to look. The NTFS header is missing. If you can provide a brief set of events before you got into this situation, it may help suggest a path forward.

     

    Testdisk (http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step) has proven very handy in the past, but a bit of forensics would be very illuminating.

  • by Eugeniu_K,

    Eugeniu_K Eugeniu_K Jan 15, 2015 3:00 PM in response to Loner T
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    Jan 15, 2015 3:00 PM in response to Loner T

    Loner T wrote:

     

    Eugeniu_K wrote:

     

    Did you had a chance to review the output above?

    Apologies. Did not get a chance to look. The NTFS header is missing. If you can provide a brief set of events before you got into this situation, it may help suggest a path forward.

     

    Testdisk (http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step) has proven very handy in the past, but a bit of forensics would be very illuminating.

     

    There was nothing specific or different from the others here that had the same problem...

         Just updated the OS to the latest Yosemite and it did broke my NTFS partition for Windows 7. I see the same picture as in the first post (disk0s4)

    Didn't do anything with it except the outputs you asked...

     

    I don't have experience in using TestDisk, and I really don't want to mess the things up even more... still hope there is a way to recover the NTFS boot option for Win7

  • by Loner T,

    Loner T Loner T Jan 15, 2015 3:30 PM in response to Eugeniu_K
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    Jan 15, 2015 3:30 PM in response to Eugeniu_K

    Were there any partition resizing done prior to the Yosemite upgrade?

     

    Testdisk is a read-only utility (unless you choose to modify any partition information). It i used to locate NTFS partitions whose headers may be 'lost' or accidentally overwritten.

     

    GPT Fdisk is used to re-write partition tables (no data changes).

     

    You may be able to recover Windows if Testdisk can locate NTFS headers. It is a slow disk scan process to locate NTFS headers.

  • by Eugeniu_K,

    Eugeniu_K Eugeniu_K Jan 15, 2015 3:36 PM in response to Loner T
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    Jan 15, 2015 3:36 PM in response to Loner T

    Loner T wrote:

     

    Were there any partition resizing done prior to the Yosemite upgrade?

     

    Testdisk is a read-only utility (unless you choose to modify any partition information). It i used to locate NTFS partitions whose headers may be 'lost' or accidentally overwritten.

     

    GPT Fdisk is used to re-write partition tables (no data changes).

     

    You may be able to recover Windows if Testdisk can locate NTFS headers. It is a slow disk scan process to locate NTFS headers.

    Prior to Yosemite upgrade, there were two partitions: one for Mac and one for Windows, created more than three years ago... didn't make any resizing since then.

    I was using the Windows partition most of the time.

    What should I do next to locate the headers and re-write partition tables?

  • by Loner T,

    Loner T Loner T Jan 15, 2015 5:58 PM in response to Eugeniu_K
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    Jan 15, 2015 5:58 PM in response to Eugeniu_K

    If you have downloaded Testdisk, and unzipped it in a specific directory, you can start it in OS X Terminal (you need to be in the directory where the testdisk binary is located) by

     

    sudo ./testdisk /dev/rdisk0

     

    Select EFI/GPT and run a Quick Search. Use the MS Data partition (which is your current partition) and run a Deeper Search.

  • by whlinaa,

    whlinaa whlinaa Jan 15, 2015 8:52 PM in response to Loner T
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    Jan 15, 2015 8:52 PM in response to Loner T

    This solved my problem as well! Million thanks, Loner T! Your help is truly appreciated!

  • by Eugeniu_K,

    Eugeniu_K Eugeniu_K Jan 16, 2015 1:54 AM in response to Loner T
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    Jan 16, 2015 1:54 AM in response to Loner T

    Here is the result of Quick Search, which MS Data partition should I choose to continue?Screen Shot 2015-01-16 at 11.51.49 AM.png

  • by Loner T,

    Loner T Loner T Jan 16, 2015 4:31 AM in response to Eugeniu_K
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    Jan 16, 2015 4:31 AM in response to Eugeniu_K

    Assuming the eFI entry is numbered 1, pick 4 and 5 and look inside using 'P - list files'.

     

    Please do not use left/right arrow/cursor keys because it changes the partitions, and you want avoid making any changes via Testdisk.

  • by Eugeniu_K,

    Eugeniu_K Eugeniu_K Jan 18, 2015 12:32 AM in response to Loner T
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    Jan 18, 2015 12:32 AM in response to Loner T

    Here is 4:

    Screen Shot 2015-01-18 at 10.29.15 AM.png

     

    and 5:

     

    Screen Shot 2015-01-18 at 10.29.44 AM.png

  • by Eugeniu_K,

    Eugeniu_K Eugeniu_K Jan 18, 2015 5:32 AM in response to Loner T
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    Jan 18, 2015 5:32 AM in response to Loner T

    Loner T wrote:

     

    Assuming the eFI entry is numbered 1, pick 4 and 5 and look inside using 'P - list files'.

     

    Please do not use left/right arrow/cursor keys because it changes the partitions, and you want avoid making any changes via Testdisk.

    From the post above, looks like the line 4 is the one I need to recover, as it contains the Windows files.

     

    Should I use the Right/Left arrows now to change its status from Deleted to Primary?

  • by Loner T,

    Loner T Loner T Jan 19, 2015 1:00 PM in response to Eugeniu_K
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    Jan 19, 2015 1:00 PM in response to Eugeniu_K

    Do not use left/right arrow/cursor keys. They are valid on a PC, not a Mac. Do you see a System Volume Information entry in "4"?

  • by Eugeniu_K,

    Eugeniu_K Eugeniu_K Jan 19, 2015 2:16 PM in response to Loner T
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    Jan 19, 2015 2:16 PM in response to Loner T

    Loner T wrote:

     

    Do not use left/right arrow/cursor keys. They are valid on a PC, not a Mac. Do you see a System Volume Information entry in "4"?

     

    This is what I see in "4"

    Screen Shot 2015-01-18 at 10.29.15 AM.png

     

    What do you mean by "System Volume Information" entry? how does it look like?

  • by Loner T,

    Loner T Loner T Jan 19, 2015 2:21 PM in response to Eugeniu_K
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    Jan 19, 2015 2:21 PM in response to Eugeniu_K

    This is what it should look like.

     

    Testdisk-GoodWindowsPartition.png

  • by Eugeniu_K,

    Eugeniu_K Eugeniu_K Jan 19, 2015 3:38 PM in response to Loner T
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    Jan 19, 2015 3:38 PM in response to Loner T

    Loner T wrote:

     

    This is what it should look like.

     

    Testdisk-GoodWindowsPartition.png

    Found that in "16":

    Screen Shot 2015-01-20 at 1.35.14 AM.png

     

    Here it is:

    Screen Shot 2015-01-20 at 1.35.28 AM.png

     

    what should I do with it now? how to launch Gdisk?

  • by Loner T,

    Loner T Loner T Jan 19, 2015 4:04 PM in response to Eugeniu_K
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    Jan 19, 2015 4:04 PM in response to Eugeniu_K

    The 6174 sector entry is too small to contain Windows. In '4' were there any additional files listed? You should have quite a few files which are Windows-related. Can you also check '5'?

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