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Please help to give suggestion on how to recover my bootcamp after installing OS X Yosemite
Mac Pro, OS X Yosemite (10.10.1)
Will you be able to follow Missing Bootcamp Partition (with pastes!)? You will need Testdisk and GPT Fdisk. If you need links, let me know.
Will you be able to follow Missing Bootcamp Partition (with pastes!)? You will need Testdisk and GPT Fdisk. If you need links, let me know.
Hi Loner T,
I am trying to follow some of discussion, but I dont know much about bytes and offset. Can you help me about what should I do with this operation based on my screen capture:
Especially what number that should I use 🙂
Scroll down to the first MS Data entry and use 'P' to list files and look for familiar Windows files including 'System Volume Information'.
Repeat this for all MS Data entries.
Do not use left/right arrow/cursor keys in Testdisk since it alters partitions.
Here is my hexdump :
The first ms data result:
Second MS data result:
a
I can found all my bootcamp data here and also the system volume information.
You have not found the correct NTFS header, so you cannot change the GPT yet. What does 'P' show within each MS Data partition?
Hi Loner T,
Here is the 1st until the 3rd print screen:
Do not quit yet.
Do you mean I need to wait on that screen?
Do I need to do deeper search on the 1st Ms Data?
No. You have found your lost NTFS partition. Here is a table I use to validate that it is reasonable.
| GPT 3 Start | GPT 3 Size | GPT 3 End | NTFS Start | Byte Offset | NTFS Size | NTFS End |
| 205722144 | 1269536 | 206991680 | 207065088 | 73408 | 105515001 | 312580089 |
So your 'numbers' look as follows...
| 207065088 |
| 105515001 |
This will delete and re-write the GPT partition info for /dev/disk0s4.
Rebuild MBR to match the new GPT information thus resetting the Hybrid MBR
Test 1 - Does Bootcamp Volume show up in Finder?
Test 2 - Can you files in Bootcamp Volume?
Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk?
Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.
If you see a hanging underline cursor at the top left on a black screen, and it does not proceed further, you may need Windows Startup Repair or a tool called EasyBCD.
THanks a lot Loner T.
All works fine.
i Dont need windows repair.
Very nice. One of the quickest discussions, thanks to you. 😎
I Have read many threads about this since two days ago.
the only thing difficult to understand is how to define the magic "number" 😀
Missing Operating System after installing OS X Yosemite
