Q: El Capitan has deleted my bootcamp windows partition

I upgraded to El Capitan and now my Windows 10 partition has disappeared. After googling the problem, it seems to be related to having resized my windows partition - which I did when I upgraded to Windows 10, after upgrading to Yosemite but before upgrading to El Capitan... I attach the following screen-shot which seems to be the first of the questions that gets asked:

I also tried to install gdisk 1.0.0 but I get a warning message when I do. I tried ignoring the message and installing anyway, but it seems to fail to install.

Any help would be greatly appreciated as I don't think I can face having to reinstall everything from scratch.

iMac, OS X El Capitan (10.11), Windows 10 boot camp partition

Posted on Oct 12, 2015 2:16 PM

I have this question too

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Loner T

Level 7 (23,663 points)

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No questions are stupid. Every problem provides new and subtle learning. First and foremost, backup OS X and Windows. Second, create a Windows System Restore point. Create a backup schedule.

Does your mouse come with a driver? You can check the manufacturer website.

Yes, you will have to re-enable SIP using csrutil.

Posted on Oct 13, 2015 1:48 AM

Q: El Capitan has deleted my bootcamp windows partition

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by Loner T,

Loner T Oct 23, 2015 11:15 AM in response to Sean_fa
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Oct 23, 2015 11:15 AM in response to Sean_fa

Are there any more MS Data entries below the last entry on this screen. BTW, this is the Quick Search screen.
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by Sean_fa,

Sean_fa Oct 23, 2015 5:53 PM in response to Loner T
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Oct 23, 2015 5:53 PM in response to Loner T

Yes there was more....
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by Loner T,

Loner T Oct 23, 2015 6:03 PM in response to Sean_fa
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Oct 23, 2015 6:03 PM in response to Sean_fa

These are small and broken up. This is roughly the area where there should be large NTFS segment.
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by Sean_fa,

Sean_fa Oct 23, 2015 7:01 PM in response to Loner T
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Oct 23, 2015 7:01 PM in response to Loner T

Is it fixable? What should I do next?
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by Loner T,

Loner T Oct 23, 2015 7:53 PM in response to Sean_fa
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Oct 23, 2015 7:53 PM in response to Sean_fa

The best thing at this point is a Deeper Search. Select the first MS Data entry and press Enter/Return. Testdisk will show a Deeper Search option.
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by Sean_fa,

Sean_fa Oct 24, 2015 11:01 AM in response to Loner T
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Oct 24, 2015 11:01 AM in response to Loner T

What's the chance to make the Bootcamp drive work? because there are a lots of data in there and I really need them.
Or if the chance is low is there any other way to just recover my data?
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by Loner T,

Loner T Oct 24, 2015 11:43 AM in response to Sean_fa
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Oct 24, 2015 11:43 AM in response to Sean_fa

If you run the Deeper Search, let us check what parts can be recovered once it finishes. This can take some time, so please be patient.
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by Loner T,

Loner T Oct 24, 2015 1:24 PM in response to Sean_fa
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Oct 24, 2015 1:24 PM in response to Sean_fa

Can you start a new discussion? There are a few options in the Testdisk Advanced menu which we should check. The new discussion will avoid confusion.
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by Sean_fa,

Sean_fa Oct 24, 2015 2:08 PM in response to Loner T
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Oct 24, 2015 2:08 PM in response to Loner T

What should I use for new discussion Title?
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by Loner T,

Loner T Oct 24, 2015 9:23 PM in response to Sean_fa
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Oct 24, 2015 9:23 PM in response to Sean_fa

Choose any appropriate title as you see fit, but please ensure it is posted in the Bootcamp discussions.
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by Sean_fa,

Sean_fa Oct 31, 2015 12:17 PM in response to Loner T
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Oct 31, 2015 12:17 PM in response to Loner T

Hello again Loner T,
Here is the link for new discussion:Recover Data After El Capitan Deleted my Bootcamp Windows Partition data
Deeper search finished after 1 week, Please advice.
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by sherifsayed85,

sherifsayed85 Nov 22, 2015 4:59 AM in response to Loner T
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Nov 22, 2015 4:59 AM in response to Loner T

Re: After upgrading to El Capitan i can't find Windows partition
plz Loner T , check my case out and help me!
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by Tateweb,

Tateweb Dec 8, 2015 5:01 PM in response to Loner T
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Dec 8, 2015 5:01 PM in response to Loner T

You sir are a legend . I had the same problem with a missing Bootcamp partition after an El Capitan upgrade. I followed your steps and it worked perfectly. In a cyncial world it's so refreshing to find someone who is will to help without reward. I'm in your debt, thank you.
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by Loner T,

Loner T Dec 8, 2015 5:23 PM in response to Tateweb
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Dec 8, 2015 5:23 PM in response to Tateweb

Please back up OS X, windows and create a windows system restore point.
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by Tateweb,

Tateweb Dec 8, 2015 5:51 PM in response to Loner T
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Dec 8, 2015 5:51 PM in response to Loner T

I Will, thanks
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