Missing bootcamp win7 after updating the mac to OS X Yosemite

This makes a lot more sense. You may need Windows Startup Repair. Are there any other MS Data partitions left in your list to look into?

The 195928064 start is what you should use to recreate the GPT. You start overlaps the Recovery HD, so you will also need to delete the Recovery HD GPT#3, before you create the new GPT#4.

Please stop if you see any error messages. This is an example. Please use the correct values for start/end.

1. Delete the old entry and create a new entry at GPT#4.

sudo gdisk /dev/disk0

p

d

4

n

4

86923264

538218489

0700

p

w

y

2. You will need to reboot after the change, because the disk you are booted from is the one being modified. Reboot will rebuild disk0s4 using the start/end you entered.

3. Run the dd command - sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C and check that the first line contains "R.NTFS".

4. This is a tedious process and you want to check after the second 'p'rint command that it looks reasonable, before the 'w'rite and 'y'es to confirm.

5. Once you a working GPT#4, a new hybrid MBR needs to be created which will overwrite what you see in your Fdisk output. This is also done using GPT Fdisk (Gdisk).

6. a. Test 1 - Can you see your Bootcamp volume in Finder.

b. Test 2 - Can you files in the Bootcamp volume?

c. Test 3 - Can you see Bootcamp in your System Preferences -> Startup Disk.

d. Test 4 - If Test 1-3 are successful, select Bootcamp and click on Restart. You may need Windows startup repair, if you see a hanging underline cursor at the top left corner of your screen. In most cases, it is not required.

Here is an example for recreating the GPT...

Command (? for help): d

Partition number (1-4): 4

Command (? for help): n

Partition number (4-128, default 4): 4

First sector (34-1954210086, default = 1454210080) or {+-}size{KMGTP}: 1454211072

Last sector (1454211072-1954210086, default = 1954210086) or {+-}size{KMGTP}: 1954209791

Current type is 'Apple HFS/HFS+'

Hex code or GUID (L to show codes, Enter = AF00): 0700

Changed type of partition to 'Microsoft basic data'

Command (? for help): p

Disk /dev/disk0: 1954210120 sectors, 931.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 6ED0C429-00D1-4759-B50E-04B6FB80D0E3

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 1954210086

Partitions will be aligned on 8-sector boundaries

Total free space is 1293 sectors (646.5 KiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 1452940543 692.6 GiB AF00 Customer

3 1452940544 1454210079 619.9 MiB AB00 Recovery HD

4 1454211072 1954209791 238.4 GiB 0700 Microsoft basic data

You need to create the Hybrid MBR. Here is an example...

sudo gdisk /dev/disk0

GPT fdisk (gdisk) version 0.8.10

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Partition table scan:

MBR: hybrid

BSD: not present

APM: not present

GPT: present

Found valid GPT with hybrid MBR; using GPT.

Command (? for help): p

Disk /dev/disk0: 490234752 sectors, 233.8 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 59BDFEEB-1EB4-4529-94FE-3CBC2C3CD513

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 490234718

Partitions will be aligned on 8-sector boundaries

Total free space is 2604 sectors (1.3 MiB)

Number Start (sector) End (sector) Size Code Name

1 40 409639 200.0 MiB EF00 EF

2 409640 401060383 191.0 GiB AF05 Macintosh HD

3 401060384 402329919 619.9 MiB AB00 Re

4 402331648 490233848 41.9 GiB 0700 Microsoft basic data

Command (? for help): r

Recovery/transformation command (? for help): h

WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one,

just hit the Enter key at the below prompt and your MBR partition table will

be untouched.

Type from one to three GPT partition numbers, separated by spaces, to be

added to the hybrid MBR, in sequence: 2 3 4

Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): y

Creating entry for GPT partition #2 (MBR partition #2)

Enter an MBR hex code (default AF): AF

Set the bootable flag? (Y/N): n

Creating entry for GPT partition #3 (MBR partition #3)

Enter an MBR hex code (default AB): AB

Set the bootable flag? (Y/N): n

Creating entry for GPT partition #4 (MBR partition #4)

Enter an MBR hex code (default 07): 07

Set the bootable flag? (Y/N): y

Recovery/transformation command (? for help): w

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING

PARTITIONS!!

Do you want to proceed? (Y/N): y

OK; writing new GUID partition table (GPT) to /dev/disk0.

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

Warning: The kernel may continue to use old or deleted partitions.

You should reboot or remove the drive.

The operation has completed successfully.

Now Reboot and verify the output of fdisk again.

The "d" command manipulates the entries, it does not remove any data. If you are not comfortable, there is a "b" (backup option) in the main menu of Gdisk, which backup your GPT to a file in the current directory, that you can move to an external disk, for safekeeping.

The start/end you currently have are correct.

Since you are deleting 3 and 4 existing entries, you use n, 3 not n,4 otherwise your Hybrid MBR will be incorrect. Once you have Windows running correctly, re-installing OSX will recreate the Recovery HD.

The Gdisk looks correct. Since the Recovery HD is being removed, to get it back, you will need to re-install oSX once Windows starts working correctly.

Unless you make a mistake and manipulate GPT#1 or #2, OSX should continue to work. You can no longer use local recovery.