Q: An Update to my Mac COMPLETELY Obliterated Boot Camp

Apple Community,

Please help me. Two days ago I performed an update; I have a 27 inch 3.2 GHz iMac (not sure what kind of specs the community needs here). I updated to the OS X Yosemite 10.10.5 and the update completely erased my boot camp. I had 300-400 (not exactly sure how much I had) GB partitioned to the Windows 7 side. I tried to just repartition it today, and start from scratch. It won;t let me do it. Can I recover this data? Can I just revert it?

Please someone help me...

Stephanie

Also, I will check this regularly...

iMac (27-inch, Late 2013), OS X Yosemite (10.10.5)

Posted on Nov 1, 2015 6:57 AM

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Q: An Update to my Mac COMPLETELY Obliterated Boot Camp

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by treehuggwanz,

treehuggwanz Nov 2, 2015 8:20 AM in response to Loner T
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Nov 2, 2015 8:20 AM in response to Loner T

Should I list files for each of the MS Data, or one of those ones in particular?
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by Loner T,

Loner T Nov 2, 2015 8:39 AM in response to treehuggwanz
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Nov 2, 2015 8:39 AM in response to treehuggwanz

Let us try the first MS Data. If you a listing similar to the following, please post a screen shot.
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by treehuggwanz,

treehuggwanz Nov 2, 2015 8:43 AM in response to Loner T
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Nov 2, 2015 8:43 AM in response to Loner T

Not sure exactly which one in particular you want to look at, some of them have files, and some of them say 'Can't open filesystem, File system seems damaged.'
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by treehuggwanz,

treehuggwanz Nov 2, 2015 8:49 AM in response to treehuggwanz
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Nov 2, 2015 8:49 AM in response to treehuggwanz

Sorry, just saw your reply

First MS Data
Second MS data

Third one: Cant open file system
Fourth:
Fifth:
Sixth:
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by Loner T,

Loner T Nov 2, 2015 8:58 AM in response to treehuggwanz
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Nov 2, 2015 8:58 AM in response to treehuggwanz

Can you look at the MS Data starting at 329085489 (value from first column - Start)? You are looking at the smaller chunks which are not meaningful.

The number 820310016 occurs several times, and we should look at each MS Data which has this size value.
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by treehuggwanz,

treehuggwanz Nov 2, 2015 9:12 AM in response to Loner T
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Nov 2, 2015 9:12 AM in response to Loner T

Starting at MS Data 329085489 is 'Can't open filesystem. Filesystem seems damaged.'

Each file size 820310016 says 'Can't open filesystem. Filesystem seems damaged.'
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by Loner T,

Loner T Nov 2, 2015 9:19 AM in response to treehuggwanz
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Nov 2, 2015 9:19 AM in response to treehuggwanz

Check the MS Data entries with size 536871938. The other size entries to be checked are 588562432.
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by treehuggwanz,

treehuggwanz Nov 2, 2015 9:45 AM in response to Loner T
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Nov 2, 2015 9:45 AM in response to Loner T

Cant find any MS Data with size 536871938
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by Loner T,

Loner T Nov 2, 2015 10:04 AM in response to treehuggwanz
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Nov 2, 2015 10:04 AM in response to treehuggwanz

The other one was HFS, so ignore it. Have you exhausted most of the large MS Data entries?
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by treehuggwanz,

treehuggwanz Nov 2, 2015 10:08 AM in response to Loner T
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Nov 2, 2015 10:08 AM in response to Loner T

I feel I've exhausted most MS Data, besides the 'Can't open filesystem. Filesystem seems damaged.' Here is what it has been looking like.

Towards the end, this is the only thing that looked different to me
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by Loner T,

Loner T Nov 2, 2015 10:12 AM in response to treehuggwanz
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Nov 2, 2015 10:12 AM in response to treehuggwanz

This is a corrupted section and the size of 2880 sectors is too small to hold 300-400GB parts.
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by treehuggwanz,

treehuggwanz Nov 2, 2015 10:19 AM in response to Loner T
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Nov 2, 2015 10:19 AM in response to Loner T

Ok, I will go through each MS Data again and see if it compares to the screenshot you provided. I am sensing no hope here?
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by Loner T,

Loner T Nov 2, 2015 10:25 AM in response to treehuggwanz
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Nov 2, 2015 10:25 AM in response to treehuggwanz

There is also an Advanced option, but it requires a MS Data partition that can be considered fixable. We can try that next.

After you lost the Windows partition, did you try any repartitioning/resizing before the Testdisk scans?
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by treehuggwanz,

treehuggwanz Nov 2, 2015 10:29 AM in response to Loner T
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Nov 2, 2015 10:29 AM in response to Loner T

I attempted boot camp assistant, but it told me the windows disk I was using wasn't a high enough windows version; the disk is windows 7. I'm unsure if it's because of my Mac, because of the windows product key, or some other reason. So I didn't get very far on repartitioning
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by Loner T,

Loner T Nov 2, 2015 10:33 AM in response to treehuggwanz
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Nov 2, 2015 10:33 AM in response to treehuggwanz

What was the version of Windows in use, before this happened? W7 SP1 and W7 DVDs behave differently.
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