colinkoenig
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Q: Bootcamp partition missing after yosemite installation

I am running OS X 10.10.1 currently. Right after I upgraded to Yosemite my windows 7 partition was missing. I have all of my school work and programs on that partition and I use it quite often. I have seen other questions similar to this but none with an external hard drive backed up like I do. I tried to repair the windows 7 partition with disk utility but it appears to just be floating in cyber space unrecognizable and unrepairable. Something happened when I "upgraded" to Yosemite.

 

Thankfully, I have an external hard drive with both my Macbook partition as well as my windows 7 partition saved on to my external hard drive. I went the extra mile and partitioned my external hard drive as well with a macbook partition and a windows 7 partition so they are not in the same part of the hard drive. Unfortunately I'm a little rusty with my tech skills now. How can I just restore this back to what it was? time machine won't restore my windows 7 partition. I just want everything back to where it was originally, I don't care about yosemite. I'm quite sure that I didn't overwrite the windows 7 partition on my external hard drive because it doesn't exist on this new operating system, so it must be in my external drive. Can someone please give me some direction for a beginner on stuff like this?

MacBook Pro (15-inch Mid 2012)

Posted on Mar 4, 2015 2:35 PM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (24,738 points)
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A:

Leave your Testdisk display and start a new Terminal Window. Please use the following steps.

 

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. 779970560 - Start offset in bytes  (start point for Bootcamp part)
  8. +196802553 (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). The only values that need modifications are the Boot flags and step 6. Accept all other defaults that Gdisk offers.


  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.

Posted on Mar 4, 2015 6:18 PM

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colinkoenig

Q: Bootcamp partition missing after yosemite installation

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  • by Loner T,

    Loner T Loner T Apr 18, 2015 2:49 PM in response to bippity
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    Apr 18, 2015 2:49 PM in response to bippity

    Testdisk and GPT Fdisk are invaluable tools in such endeavors, so the authors of such tools also deserve the credit. I am glad to see it is helping the community.

  • by kswint,

    kswint kswint Apr 21, 2015 5:49 PM in response to Loner T
    Level 1 (0 points)
    Apr 21, 2015 5:49 PM in response to Loner T

    Hi, I'm trying to solve the same problem, yet when I type in "sudo gdisk /dev/rdisk0" the system returns "sudo: gdisk: command not found"

    What am I doing wrong? thanks!

  • by Loner T,

    Loner T Loner T Apr 21, 2015 5:56 PM in response to kswint
    Level 7 (24,738 points)
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    Apr 21, 2015 5:56 PM in response to kswint

    Gdisk is not a Mac native utility. You can get it from http://sourceforge.net/projects/gptfdisk/ and install it. Once installed, it is located as shown, and should automatically be in your path.

    type gdisk

    gdisk is /usr/sbin/gdisk

  • by kswint,

    kswint kswint Apr 21, 2015 7:43 PM in response to Loner T
    Level 1 (0 points)
    Apr 21, 2015 7:43 PM in response to Loner T

    Thanks- I've followed the thread very carefully, but failing so far. Only difference I see is that I seem to have only GPT 1-3, and no 4. Anyway, here are my initial diagnostics:

    Last login: Tue Apr 21 19:30:26 on console

    LisaHawkinssMBP:~ lisahawkins$ diskutil list

    /dev/disk0

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:     FDisk_partition_scheme                        *500.1 GB   disk0

       1:                       0xEE                         209.7 MB   disk0s1

       2:                  Apple_HFS Macintosh HD            465.9 GB   disk0s2

       3:               Windows_NTFS                         33.9 GB    disk0s3

       4:                       0xEE                         135.2 MB   disk0s4

    LisaHawkinssMBP:~ lisahawkins$ diskutil cs list

    No CoreStorage logical volume groups found

    LisaHawkinssMBP:~ lisahawkins$ sudo gpt -vv -r show /dev/disk0

    Password:

    gpt show: /dev/disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

    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 976773167

          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  909901824      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      910311464     264152        

      910575616   66197504      3  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      976773120         15        

      976773135         32         Sec GPT table

      976773167          1         Sec GPT header

    LisaHawkinssMBP:~ lisahawkins$ sudo fdisk /dev/disk0

    Disk: /dev/disk0 geometry: 60801/255/63 [976773168 sectors]

    Signature: 0xAA55

             Starting       Ending

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

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

    1: EE    0   0   2 -   25 127  14 [         1 -     409639] <Unknown ID>

    2: AF   25 127  15 - 1023 254  63 [    409640 -  909901824] HFS+       

    *3: 07 1023 254  63 - 1023 254  63 [ 910575616 -   66197504] HPFS/QNX/AUX

    4: EE 1023 254  63 - 1023 254  63 [ 910311464 -     264152] <Unknown ID>

    LisaHawkinssMBP:~ lisahawkins$



    And from Testdisk:

    TestDisk 7.0, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

     

    Disk /dev/disk0 - 500 GB / 465 GiB - 976773168 sectors (RO)

         Partition               Start        End    Size in sectors

    >P EFI System                    40     409639     409600 [EFI]

    D Mac HFS                   409640  910311463  909901824

    D MS Data                844265473  910518272   66252800

    D MS Data                910108673  910313472     204800

    D MS Data                910313472  910518271     204800

    D MS Data                910518272  976771071   66252800


    Of which the last one reveals this:

    TestDisk 7.0, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

         MS Data                910518272  976771071   66252800

    Directory /

     

    >dr-xr-xr-x     0     0         0 25-Dec-2014 16:18 .

    dr-xr-xr-x     0     0         0 25-Dec-2014 16:18 ..

    dr-xr-xr-x     0     0         0 30-Dec-2009 19:39 $Recycle.Bin

    dr-xr-xr-x     0     0         0  6-Jul-2014 18:23 0b7b82811c505f63a4b555bc

    dr-xr-xr-x     0     0         0 24-Jul-2014 03:01 2a2a3335c61ef1128922a4

    dr-xr-xr-x     0     0         0 23-Jul-2014 03:03 527c973c361711742234a9

    dr-xr-xr-x     0     0         0  5-Jul-2014 03:01 6890cb726756024788

    dr-xr-xr-x     0     0         0 22-Jul-2014 03:01 6f76c71cc847e45bb28aa9351be3186a

    dr-xr-xr-x     0     0         0  6-Jun-2014 03:03 733bb789d5d0761614c7bbcd

    dr-xr-xr-x     0     0         0 15-Sep-2014 08:49 799c0662421ccce03c2d

    dr-xr-xr-x     0     0         0  4-Jul-2014 03:01 866b0dbcffd6fb5df3265f1b0650ef

    dr-xr-xr-x     0     0         0  3-Oct-2010 18:24 GridConnectCDImage

    dr-xr-xr-x     0     0         0 24-Oct-2010 01:06 Intel

    dr-xr-xr-x     0     0         0 22-Apr-2013 16:21 LENSRG

    dr-xr-xr-x     0     0         0  6-Nov-2011 09:15 LENSarchive

    dr-xr-xr-x     0     0         0 30-Oct-2010 14:40 MSOCache

    dr-xr-xr-x     0     0         0  9-Nov-2014 08:52 NFDBBackup

    dr-xr-xr-x     0     0         0 29-Nov-2014 21:36 NeuroField

    dr-xr-xr-x     0     0         0 22-Apr-2013 10:53 NeuroFieldData

    dr-xr-xr-x     0     0         0 16-Jan-2010 01:21 Nfviewer

    dr-xr-xr-x     0     0         0 16-Jan-2010 01:21 PUZZLE1

    dr-xr-xr-x     0     0         0 13-Jul-2009 19:37 PerfLogs

    dr-xr-xr-x     0     0         0  2-Jul-2014 13:03 Program Files

    dr-xr-xr-x     0     0         0  2-Jul-2014 13:03 ProgramData

    dr-xr-xr-x     0     0         0 30-Dec-2009 19:39 Recovery

    dr-xr-xr-x     0     0         0 15-Jan-2010 23:33 SP

    dr-xr-xr-x     0     0         0 16-Jan-2010 01:21 SR1

    dr-xr-xr-x     0     0         0 30-Nov-2014 17:20 System Volume Information

    dr-xr-xr-x     0     0         0 27-Jan-2010 14:52 Users

    dr-xr-xr-x     0     0         0 21-Jul-2014 11:58 Windows

    dr-xr-xr-x     0     0         0 10-Jun-2014 03:01 a3b3b219ca2a5c0fb376ddeb

    dr-xr-xr-x     0     0         0  3-Jul-2014 03:01 a8625b63c9384f3598

    dr-xr-xr-x     0     0         0 10-Nov-2011 16:56 brainm.20

    dr-xr-xr-x     0     0         0  6-Jul-2014 03:01 c43e89362e8563601eb5dc28c4

    dr-xr-xr-x     0     0         0 15-Jan-2010 23:27 corrupt

    dr-xr-xr-x     0     0         0 11-Jun-2014 03:01 f21b8af659a9edd3778ff0

    dr-xr-xr-x     0     0         0  2-Jul-2014 10:13 fffbe77624226d2eeb866dff0bc91bae

    dr-xr-xr-x     0     0         0 15-Jan-2010 23:27 lensdata

    dr-xr-xr-x     0     0         0  6-Nov-2011 09:23 ol_install

    -r--r--r--     0     0  43425624  3-Oct-2010 12:13 AdbeRdr934_en_US.exe

    -r--r--r--     0     0   5975298 19-Apr-2011 11:22 Crash ILF T4 P4.bmz

    -r--r--r--     0     0         0  3-Oct-2010 18:16 IO.SYS

    -r--r--r--     0     0      2477 19-Apr-2011 11:21 InfraLowFrequency Mark Smith.bmz

    -r--r--r--     0     0         0  3-Oct-2010 18:16 MSDOS.SYS

                                                       Next


    So I use the numbers at the top to delete GPT3 and rebuild it. The only odd thing is that when I do the MBR, after I set the boot flag to Y on the GPT3, it says there's an empty partition or something and asks if I want to "protect" it or something. I've tried this answering Y and N and both paths fail to make the overall fix (ie, can't see the bootcamp volume in Finder). Any ideas?


    Thanks a million!

  • by Loner T,

    Loner T Loner T Apr 21, 2015 8:00 PM in response to kswint
    Level 7 (24,738 points)
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    Apr 21, 2015 8:00 PM in response to kswint

    If you do not want your name to show up, you may want to edit this post, if possible.

  • by Loner T,

    Loner T Loner T Apr 21, 2015 8:39 PM in response to kswint
    Level 7 (24,738 points)
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    Apr 21, 2015 8:39 PM in response to kswint

    1. GPT3 exists for OSX versions which support Recovery HD. What is your OSX version? Did this happen after a 10.10.3 Recovery Update?

    2. Your disk has become an MBR type, based on the incorrect MBR entries. Usually EFI is never explicitly added via Gdisk. The first question that Gdisk asks about good for Grub, when answered as a yes, will put the EFI as MBR1.

    3. The order of your partitions seems to be incorrect, most likely due to item 2.

    4. Recovery HD can be re-built later. The first goal should be to get Windows up and running.

    5. The following table is normally built using GPT3 and GPT4, but in your case, I have used GPT2 and GPT3.

     

    kswint-GPT.png

     

    Gdisk will use sector boundary alignment. In your case a gap of 101MB is not alignment, but space, that Gdisk wants to protect, if you ask it to. You should only specify partitions 2 and 3 in your new hybrid MBR and say yes to GRUB question, and no to additional partitions.

  • by kswint,

    kswint kswint Apr 22, 2015 2:31 PM in response to Loner T
    Level 1 (0 points)
    Apr 22, 2015 2:31 PM in response to Loner T

    OSX version is 10.10.3. This happened after upgrading from 10.6.X or something quite old. In the table above I assume NTFS = GPT3. I'm not sure what to do with the 2 sector offsets, but I'll attempt to rebuild and see. BTW, I originally did say yes to GRUB and no to additional partitions. Since that failed, I tried again saying yes to additional partitions. Thanks!

  • by kswint,

    kswint kswint Apr 22, 2015 3:00 PM in response to Loner T
    Level 1 (0 points)
    Apr 22, 2015 3:00 PM in response to Loner T

    Progress!? I managed to select Bootcamp as the startup disk in System Prefs, but when I restarted I'm now getting "BOOTMGR is missing. Press C-A-D to restart". Now I'm looking for my Windows 7 install disks...

  • by Loner T,

    Loner T Loner T Apr 22, 2015 4:14 PM in response to kswint
    Level 7 (24,738 points)
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    Apr 22, 2015 4:14 PM in response to kswint

    You may also be able to use https://support.microsoft.com/en-us/kb/927392?wa=wsignin1.0.

  • by kswint,

    kswint kswint Apr 22, 2015 4:35 PM in response to Loner T
    Level 1 (0 points)
    Apr 22, 2015 4:35 PM in response to Loner T

    I'm having no luck booting from the disk or into safe mode of any kind so I can run repairs. With the Windows 7 disk in the drive, it simply errors out into the "BOOTMGR is missing" state. And I can't seem to get it to boot back into OSX either.

  • by Loner T,

    Loner T Loner T Apr 22, 2015 5:05 PM in response to kswint
    Level 7 (24,738 points)
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    Apr 22, 2015 5:05 PM in response to kswint

    Please see https://support.microsoft.com/en-us/kb/2622803.

     

    1. If you have the W7 installation media, insert the USB (or DVD, if you have an Optical drive).

    2. In OSX System Preferences -> Startup Disk -> select Bootcamp and click on Restart.

    3. The installer should come up from the installation media. Click on Repair option, after you choose language, region, etc.

     

    It should look like http://imgur.com/a/1DaOE#0 .

  • by kswint,

    kswint kswint Apr 22, 2015 7:18 PM in response to Loner T
    Level 1 (0 points)
    Apr 22, 2015 7:18 PM in response to Loner T

    I managed to stumble around various means of rebooting into repair modes and menus, ran anything that had "repair" in it, ran bootrec /fixboot, etc, but the system always reboots into "BOOTMGR missing"....

  • by Loner T,

    Loner T Loner T Apr 22, 2015 7:40 PM in response to kswint
    Level 7 (24,738 points)
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    Apr 22, 2015 7:40 PM in response to kswint

    You can also look at http://neosmart.net/EasyBCD/. I have used it frequently to address booting issues.

     

    Please also see https://neosmart.net/wiki/bootmgr-is-missing/.

     

    You do have another option. (Re)Install Windows on the same partition.

     

    Please see http://windows.microsoft.com/en-us/windows/installing-reinstalling-windows#1TC=w indows-7.

  • by kswint,

    kswint kswint Apr 22, 2015 8:41 PM in response to Loner T
    Level 1 (0 points)
    Apr 22, 2015 8:41 PM in response to Loner T

    Wouldn't reinstalling Windows on the same partition delete all the data I have in that partition? (windows software and related data)

  • by Loner T,

    Loner T Loner T Apr 23, 2015 4:09 AM in response to kswint
    Level 7 (24,738 points)
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    Apr 23, 2015 4:09 AM in response to kswint

    From the M$ link...

     

    There are two options to choose from during the Windows 7 installation process:

    • Upgrade. This option replaces your current version of Windows with Windows 7, and keeps your files, settings, and programs in place on your computer.
    • Custom. This option replaces your current version of Windows with Windows 7, but doesn't preserve your files, settings, and programs. It's sometimes referred to as a clean installation for that reason.
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