How to Fix the Broken Bootcamp Partition after Resizing Mac OS X Partition

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How to Fix the Broken Bootcamp Partition after Resizing Mac OS X Partition

Hi guys! Yesterday I was trying to resize my Windows 7 partition and now, I cannot seem to boot it up even though there is "WINDOWS" option in black screen mode.

I'm using Macbook Pro Retina Late 2013 and OS is Yosemite 10.10.4

Here are some useful information:

I'm currently using "Deeper Search" function on Test disk but I don't know if I chose the right MS Data.

I've looked into many similar posts and it seemed like Loner T is very well informed about this issue.

Please help and thank you so much in advance!

MacBook Pro (Retina, 15-inch, Late 2013), OS X Yosemite (10.10.4)

Posted on Aug 4, 2015 12:03 AM

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Answer 1

ReadyEddie Author

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Aug 4, 2015 5:31 AM in response to ReadyEddie

After long "deeper search", here is the result:

I honestly don't know what to do from here so if you guys know what to do with info, please help.

Thank you so much in advance!

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Answer 2

Loner T

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Aug 4, 2015 6:05 AM in response to ReadyEddie

This is a list of unrecoverable partitions. Press Return to continue and you should see a list of viable partitions.

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Answer 3

ReadyEddie Author

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Aug 4, 2015 6:13 AM in response to Loner T

After I pressed return, I got this:

Is it normal? 'Cause I don't see any MS data.

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Answer 4

ReadyEddie Author

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Aug 4, 2015 6:33 AM in response to ReadyEddie

Here are some info on MS Data

I just print screen'ed anything that said MS Data. Let me know if you need further info.

*FYI* I have followed http://nerdr.com/bootcamp-partition-lost-repairing-mac-partitions/ guide and created hybrid MBR for disc0s4 and still got the error when trying to boot the windows partition.

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Answer 5

Loner T

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Aug 4, 2015 6:31 AM in response to ReadyEddie

The start address for MS Data should be close to 690243808 which 9 digits, you current start is 7-digits. You should get many more.

Did this list come out of a Deeper Search?

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Answer 6

ReadyEddie Author

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Aug 4, 2015 6:34 AM in response to Loner T

I didn't know the list went on and on.

Please check the prior post with 3 screenshots with MS Data.

Thank you.

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Answer 7

Loner T

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Aug 4, 2015 6:36 AM in response to ReadyEddie

*FYI* I have followed http://nerdr.com/bootcamp-partition-lost-repairing-mac-partitions/ guide and created hybrid MBR for disc0s4 and still got the error when trying to boot the windows partition.

This can cause data loss. If your GPT is corrupt and the MBR is correct, overwriting the MBR has just cost you your Windows installation. This is an irresponsible article without understanding the ramifications of the actions.

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Answer 8

ReadyEddie Author

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Aug 4, 2015 6:37 AM in response to Loner T

yea... I kinda suspected as much. I was desperate and tried this method. Is there any way to recover?

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Answer 9

Loner T

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Aug 4, 2015 6:41 AM in response to ReadyEddie

The following table shows you the most reasonable candidate.

GPT3 Start	GPT 3 Size	GPT3 End	Sector Offset	NTFS Start	NTFS Size	NTFS End	Sector Offset (GB)	NTFS Size (GB)
688974272	1269536	690243807	1825	690245632	286859257	977104888	0.89	136.79

Go to the MS Data entry at the address in the NTFS Start column and use 'P' to list files. The output should look similar to the following.

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Answer 10

ReadyEddie Author

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Aug 4, 2015 6:44 AM in response to Loner T

I'm afraid I can't find system information....

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Answer 11

ReadyEddie Author

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Aug 4, 2015 6:53 AM in response to ReadyEddie

So what happened was, I have decreased my OS X partition and made space for Windows 7 partition. After decreasing OS X partition, I went to windows 7 and used MiniTool Partition Wizard to merge the open partition and existing windows 7 partition. After the procedure, I couldn't get onto windows 7 and I was looking for answers.

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Answer 12

Loner T

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Aug 4, 2015 6:58 AM in response to ReadyEddie

The current size is 136GB. Can you post the output of

sudo fdisk /dev/disk0

Let us check if the MBR can provide any clues. If you have overwritten the MBR with the NERDR link, then we will need to use this entry and assume it will work.

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