Windows 7 Removed after update Yosemite

Can you post the text version of output of the following commands from Terminal?

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

Msh3lany wrote:

1522301936 232004624

1754306560 199217152 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

In most cases, this can be recovered. There are two tools used for this.

1. Testdisk - http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step

2. GPT Fdisk - http://sourceforge.net/projects/gptfdisk/

The steps are...

1. Use Testdisk to locate the 'lost' NTFS header in the gap between GPT3 and GPT4.

2. Once located, GPT4 is deleted/recreated using GPT Fdisk (aka gdisk).

3. The gap between GPT3 and GPT4 seems to indicate a resized Windows partition using either a third-party tool, or Disk Utility and GPT/MBR manipulation.

4. The Gap + GPT4 are 431221776 sectors (roughly 215+GB).

5. Windows resizing is not recommended/supported by BCA when using the Hybrid MBR method (pure EFI/GPT are resizeable and are supported on 2013+ Macs).

6. Yosemite causes problems, because there is a deleted NTFS header prior to resizing, and a new one. It uses the older version and causes a gap and causes problems. If you do not resize Windows, once it is fixed now, future versions will respect the current configuration since GPT and MBR will be in sync.

Testdisk needs to be run in Deeper Search to look for deleted NTFS Headers.

Choose an EFI/GPT partition type...

The 'lost' partition should look very similar to this.

The 'Sector Offset' being positive is good. A negative value means you lose GPT#3. The NTFS size is roughly 215GB which is good.

You need to use the following steps. If you see any error messages during the following steps, please stop and post back here with the error message. The following steps have values from your Testdisk output (and you can verify) in Steps 7 and 8.

Rebuild GPT4 using start/end offsets

1. Sudo gdisk /dev/rdisk0
2. P (print the full list of parts)
3. D (delete)
4. 4 (part 4)
5. N (new part)
6. 4 (part 4)
7. 1522302976 - Start offset in bytes (start point for Bootcamp part)
8. +431220729 (Size offset as opposed to End offset)
9. 0700 (Windows part type)
10. P (print list of all parts just to see what changes will be made)
11. W (Write the new GPT)
12. Y (Yes! really write the new GPT)

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. Use defaults for other questions (like partition codes).

1. Sudo gdisk /dev/disk0
2. P (Print list of parts)
3. R (Recover)
4. H (chooses Hybrid)
5. Partitions numbers to be hybridized: 2 3 4
6. Y (Good for GRUB question)
7. N (part 2 boot flag)
8. N (part 3 boot flag)
9. Y (part 4 boot flag make NTFS bootable partition)
10. W (Write the new MBR)
11. Y (Yes! write the new MBR)
12. Reboot

Test 1 - Does Bootcamp Volume show up in Finder?

Test 2 - Can you see 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.

You will need to download GPT Fdisk (http://sourceforge.net/projects/gptfdisk/). It will downloaded as a package. Once the disk image (.dmg) is opened (double click on it in the Downloads directory), it will show a package, that you can double-click on to install it. Once the GPT Fdisk (aka gdisk) is installed, run it, and follow the steps.

Please say no. You need to only change the "bootable" flag for 2,3,4. The MBR hex code should be default, otherwise it will cause more grief.

Please confirm 'Y' and press enter. Recreate the MBR and test.

Recreate the MBR first.