fhornedo
Level 1 (0 points)

Q: Yosemite Upgrade Broke Bootcamp

Upgraded to Yosemite and now when I ALT Boot Windows 7 and Recovery partitions no longer show up. Using information from other threads I managed to get my Windows 7 partition to show up but when I select it I receive an ERROR READING DISK message. Is there any way to get this fixed?

 

diskutil list


/dev/disk0

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *750.2 GB   disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:          Apple_CoreStorage                         647.3 GB   disk0s2

   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

   4:       Microsoft Basic Data                         61.0 GB    disk0s4

/dev/disk1

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:                  Apple_HFS Mac HD                 *647.0 GB   disk1

                                 Logical Volume on disk0s2

                                 EE76C469-0C14-4592-986A-81FA25FAAF17

                                 Unencrypted


diskutil cs list


CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 02310D8F-058E-4CCF-8B7F-DAAED96FD1EF

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

    Name:         Mac HD

    Status:       Online

    Size:         647348539392 B (647.3 GB)

    Free Space:   18927616 B (18.9 MB)

    |

    +-< Physical Volume 0ABB2748-5135-4046-ACBB-5768C422F26B

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

    |   Index:    0

    |   Disk:     disk0s2

    |   Status:   Online

    |   Size:     647348539392 B (647.3 GB)

    |

    +-> Logical Volume Family 067A450C-844D-4465-8F8B-3DF65E5E2FF9

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

        Encryption Status:       Unlocked

        Encryption Type:         None

        Conversion Status:       NoConversion

        Conversion Direction:    -none-

        Has Encrypted Extents:   No

        Fully Secure:            No

        Passphrase Required:     No

        |

        +-> Logical Volume EE76C469-0C14-4592-986A-81FA25FAAF17

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

            Disk:                  disk1

            Status:                Online

            Size (Total):          646977290240 B (647.0 GB)

            Conversion Progress:   -none-

            Revertible:            Yes (no decryption required)

            LV Name:               Mac HD

            Volume Name:           Mac HD

            Content Hint:          Apple_HFS


sudo gpt -vv -r show /dev/disk0


gpt show: /dev/disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168

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 1465149167

       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  1264352616      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

  1264762256     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

  1266031792    79977296        

  1346009088   119138304      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  1465147392        1743        

  1465149135          32         Sec GPT table

  1465149167           1         Sec GPT header


sudo fdisk /dev/disk0


Disk: /dev/disk0 geometry: 91201/255/63 [1465149168 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 - 1264352616] HFS+       

3: AB 1023 254  63 - 1023 254  63 [1264762256 -    1269536] Darwin Boot

*4: 0C 1023 254  63 - 1023 254  63 [1346009088 -  119138304] Win95 FAT32L

Macbook Pro, Mac OS X (10.5.5)

Posted on Oct 22, 2014 5:54 PM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (24,202 points)
Safari
A:

Take a look at the following example. You need to use your own start/end rather than what is here...

 

Post back when you are ready for Step 5.

 

"Please stop if you see any error messages.

 

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...

 

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

 

"

Posted on Oct 24, 2014 3:37 AM

Close
fhornedo

Q: Yosemite Upgrade Broke Bootcamp

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  • by Willowdog,

    Willowdog Willowdog Oct 26, 2014 10:31 PM in response to Loner T
    Level 1 (0 points)
    Oct 26, 2014 10:31 PM in response to Loner T

    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

     

    Screen Shot 2014-10-26 at 10.23.21 PM.png

  • by Loner T,

    Loner T Loner T Oct 27, 2014 6:34 AM in response to Willowdog
    Level 7 (24,202 points)
    Safari
    Oct 27, 2014 6:34 AM in response to Willowdog

    I cannot see the image, due to issues with the forum. Can you start a new thread and post the image using an image sharing service?

  • by rubby0913,

    rubby0913 rubby0913 Oct 28, 2014 11:42 AM in response to fhornedo
    Level 1 (0 points)
    Oct 28, 2014 11:42 AM in response to fhornedo

    Hi, why does your step 5 performed in testdisk? not disk?

  • by Loner T,

    Loner T Loner T Oct 28, 2014 11:55 AM in response to rubby0913
    Level 7 (24,202 points)
    Safari
    Oct 28, 2014 11:55 AM in response to rubby0913

    rubby0913 wrote:

     

    Hi, why does your step 5 performed in testdisk? not disk?

     

    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).

     

    It is using Gdisk.

  • by Don Arrington,

    Don Arrington Don Arrington Oct 30, 2014 6:51 AM in response to Loner T
    Level 1 (0 points)
    Oct 30, 2014 6:51 AM in response to Loner T

    @lonerT  broken partition

  • by Sixpack Jack,

    Sixpack Jack Sixpack Jack Oct 30, 2014 12:42 PM in response to fhornedo
    Level 1 (0 points)
    Oct 30, 2014 12:42 PM in response to fhornedo

    this is a whole lot of nonsense work that shouldn't be required by the end user. do any of you know if its possible to roll back before yosemite upgrade?

  • by Loner T,

    Loner T Loner T Oct 30, 2014 12:58 PM in response to Sixpack Jack
    Level 7 (24,202 points)
    Safari
    Oct 30, 2014 12:58 PM in response to Sixpack Jack

    Sixpack Jack wrote:

     

    do any of you know if its possible to roll back before yosemite upgrade?

    I am not sure what you are asking to be rolled back.

  • by Sixpack Jack,

    Sixpack Jack Sixpack Jack Oct 30, 2014 1:07 PM in response to Loner T
    Level 1 (0 points)
    Oct 30, 2014 1:07 PM in response to Loner T

    Sorry just frustrated what I meant to say was, here is my situation

     

     

    I use bootcamp to boot windows 8 for my networking school work. but i upgraded to yosemite this week and now i can't boot into my windows 8 any more i see the disk, when i hold down the option button and when i select it it appears to attempt to boot, but then goes to a black screen and stays there, its crucial for me to get into that because all of my school work for cisco classes is on that due to needing packet tracer. I don't know what to do, so when i posed the question can i roll back yosemite, what i meant was can i downgrade from yosemite back to maverick and get my access back to my bootcamp OS. earlier i just dropped a quick comment obviously the wrong thing to do was just frustrated I hope this is more descriptive and someone can help me.

     

    Thanks

    Brian

  • by Loner T,

    Loner T Loner T Oct 30, 2014 1:12 PM in response to Sixpack Jack
    Level 7 (24,202 points)
    Safari
    Oct 30, 2014 1:12 PM in response to Sixpack Jack

    Please start a new thread. In this article, there are four commands executed from OS X Terminal which would be very helpful in the new thread. The damage has already been done by the Yosemite upgrade. Please post text output of the commands after removing any personal information as you see fit.

     

    Let me know if you need the commands.

  • by Sixpack Jack,

    Sixpack Jack Sixpack Jack Oct 30, 2014 1:15 PM in response to Loner T
    Level 1 (0 points)
    Oct 30, 2014 1:15 PM in response to Loner T

    If you don't mind , can you give me those commands. I will respond asap.

  • by Loner T,

    Loner T Loner T Oct 30, 2014 1:20 PM in response to Sixpack Jack
    Level 7 (24,202 points)
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    Oct 30, 2014 1:20 PM in response to Sixpack Jack

    diskutil list

    diskutil cs list

    sudo gpt -vv -r show /dev/disk0

    sudo fdisk /dev/disk0

  • by Sixpack Jack,

    Sixpack Jack Sixpack Jack Oct 30, 2014 1:24 PM in response to Loner T
    Level 1 (0 points)
    Oct 30, 2014 1:24 PM in response to Loner T

    i just open terminal and use these in terminal

  • by Sixpack Jack,

    Sixpack Jack Sixpack Jack Oct 30, 2014 1:26 PM in response to Sixpack Jack
    Level 1 (0 points)
    Oct 30, 2014 1:26 PM in response to Sixpack Jack

    /dev/disk0

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *251.0 GB   disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:                  Apple_HFS Macintosh HD            171.6 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data                         78.5 GB    disk0s4

  • by Sixpack Jack,

    Sixpack Jack Sixpack Jack Oct 30, 2014 1:26 PM in response to Sixpack Jack
    Level 1 (0 points)
    Oct 30, 2014 1:26 PM in response to Sixpack Jack

    No CoreStorage logical volume groups found

  • by Sixpack Jack,

    Sixpack Jack Sixpack Jack Oct 30, 2014 1:28 PM in response to Sixpack Jack
    Level 1 (0 points)
    Oct 30, 2014 1:28 PM in response to Sixpack Jack

    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  335216608      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      335626248    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      336895784        216        

      336896000  153337856      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      490233856        863        

      490234719         32         Sec GPT table

      490234751          1         Sec GPT header

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