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fallen002 Author

Level 1

0 points

Can't boot from bootcamp after sudden crash

Hi,

So today I was playing cs:go, running bootcamp, when suddenly my mac crashed and rebooted to mavericks... I've tried several things on this thread but I still can't boot on bootcamp... I really need some files I have there and I can't access them -.-' Is there a way to fix this and get bootcamp to work again? Tell me what you need from terminal so I can upload it here.

Btw, when I created the bootcamp partition I created it with 100gb and later I upgraded it to 400gb without reinstalling bootcamp but it as worked fine for more than a month so I'm assuming that is not the problem...

I really need some help with this...

Thanks,

Gabriel

iMac, OS X Mavericks (10.9.2)

Posted on Sep 23, 2014 5:45 PM

Top-ranking reply

Loner T

Level 9

59,513 points

Posted on Sep 23, 2014 6:22 PM

1. The ~300 GB is sitting right above the GPT#4 entry. Your NTFS header is corrupt.

2. You have two NTFS entries. GPT#4's start/size match the entry #3 in the Fdisk output, but is unbootable (the missing "*").

3. The Fdisk entry #4 has all zeroes and is bootable, but has invalid start/size (0/0).

4. Download GPT Fdisk from SourceForge.net. (http://sourceforge.net/projects/gptfdisk/).

5. Run sudo gdisk /dev/disk0. Delete GPT#4 entry.

6. Add GPT#4 again with start = 1206448520, end=1953525134 (1 before the SEC GPT Table start). You will lose Recovery HD. If you need it, use Command+R to re-install OS X after Windows is functional (not before).

7. In Gdisk, re-create a Hybrid MBR with 2 3 4 (and allow it to add the EFI into the MBR). If you need step-by-step, please post back here.

8. Reboot into OS X.

9. Verify that Bootcamp volume is visible in Finder.

10. Verify that you can see files in Bootcamp volume in Finder.

11. Verify that you can select Bootcamp in System Preferences -> Startup Disk.

12. Select Bootcamp and reboot.

If there are any error messages, please stop and post back here.

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