Yosemite Upgrade Broke Bootcamp

Gdisk boot ability for the MBR should have no bearing on Recovery HD. Can you post the output of sudo fdisk /dev/disk0?

The #3 entry (as well as GPT#3) is your Recovery HD. If you power cycle your Mac and hold Command+R, do you get Recovery without a spinning globe?

Please test Command+Opt+R just to be certain you see a spinning global and than recovery. You may be offered a different OS than what Command+R does., so that is a good test as well.

Good to see all working for you.

Dear Loner T, Can you help me with the same problem! I have started a new thread in the following link: Missing bootcamp win7 after updating the mac to OS X Yosemite

Hi Loner,

I have followed this instructions, but it didn't work for me. I can see that you are pretty advanced and followed other posts(Repairing Boot Camp after creating new partition) from you which helped at least see the partition when pressing ATL when booting, but I am having Missing Operation system and even startup repair can't repair. Here's my output and thanks for you help in advance, I don't know what to do and help will be appreciated. :

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *251.0 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage 200.1 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 50.0 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD *199.8 GB disk1

Logical Volume on disk0s2

7F0AFFB1-38EC-4913-B927-68E19727B9D7

Unencrypted

diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group DAC95FBC-7599-4F3A-AC33-9E2DF24F909D

=========================================================

Name: Macintosh HD

Status: Online

Size: 200140746752 B (200.1 GB)

Free Space: 18968576 B (19.0 MB)

|

+-< Physical Volume CBC1FDE8-D586-43FB-A0FF-DB81A9FEDCA2

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 200140746752 B (200.1 GB)

|

+-> Logical Volume Family 2CE19A0E-073E-49B3-9D9D-5885C04BBC8D

----------------------------------------------------------

Encryption Status: Unlocked

Encryption Type: None

Conversion Status: NoConversion

Conversion Direction: -none-

Has Encrypted Extents: No

Fully Secure: No

Passphrase Required: No

|

+-> Logical Volume 7F0AFFB1-38EC-4913-B927-68E19727B9D7

---------------------------------------------------

Disk: disk1

Status: Online

Size (Total): 199769456640 B (199.8 GB)

Conversion Progress: -none-

Revertible: Yes (no decryption required)

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=251000193024; sectorsize=512; blocks=490234752

gpt show: /dev/disk0: Suspicious MBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 490234751

start size index contents

0 1 MBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 390899896 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

391309536 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

392579072 97654784 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

490233856 863

490234719 32 Sec GPT table

490234751 1 Sec GPT header

sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 30515/255/63 [490234752 sectors]

Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>

2: AC 1023 254 63 - 1023 254 63 [ 409640 - 390899896] <Unknown ID>

3: AB 1023 254 63 - 1023 254 63 [ 391309536 - 1269536] Darwin Boot

*4: 07 1023 254 63 - 1023 254 63 [ 392579072 - 97654784] HPFS/QNX/AUX

Hope this help

Do you get an error when executing Startup Repair? Please see this thread for BCD repair - Windows error loading after Yosemite upgrade.

Yes I do get an error. It says that Windows can't repair this Windows installation...

Thanks!

Loner T, I'm following your instructions and I can't figure out how to calculate the Start and End for the GPT part. I've posted my fdisk and my TestDisk screenshots.

Loner T, after following your instructions, and running gdisk, I see GPT#4 showing up in gdisk but not in fdisk ...

WOW!!!! IT WORKED!!

My error was I was not using the START ---- END from where I found the file listing in TestDisk, i was just using where it labeled "Bootcamp"

I was able to Boot to Windows and everything is showing up again!! LONER T YOU ARE FABULOUS!!!! 🙂🙂🙂🙂🙂🙂🙂🙂

A screen shot would be good to see, if you can use a camera and post it.

Your NTFS start is 587618304, end is 976773112 and size is 389154809.

What you see in the Fdisk output entry #4 is bogus. In this thread There is a set of steps to delete the current bogus GPT#4 and recreate it using the start/end as I posted.

After GPT#4 is corrected and Mac rebooted, you need to recreate the hybrid MBR using Gdisk, the steps are also in this thread. Once you have matching GPT#4 and MBR#4, the GPT/MBR entries are already aligned.

You should run the dd command to ensure that GPT#4/MBR#4 shows NTFS header. Once validated, run the Test 1,2,3, and 4 should bring Windows up provided it does not need any startup repair.

PS: Excellent.

Loner T,

Not sure if you're still around but could use your help. I had thought I had followed your steps but I seem to have lost my disk partition setup. I had deleted and rebuilt my get and created a new mbr but I think with my fdisk looking like below...

Any help would be appreciated. I am running teskdisk now.

Bruce