drfailbadger

Q: Lost Windows partition after upgrading to Yosemite

Hi all,

 

Hope you can help since upgrading my Mac OS to Yosemite, I have been unable to log back into my Windows Partition. If i hold alt on start up on the mac disk is shown. I have seen a few similar issues on this forum and been trying to follow the post but struggling a little now so wondered if some could help with next step

 

This seems to be the info from the other threads. I have installed the test disk utility and done a analyse on the disk, i'm little unsure of what to do now, i would like if possible to go back into the windows instead of reinstalling as i have quite a bit of data on that side of the disk.

 

Any help massively appreciated Dave

 

Screen Shot 2015-02-05 at 00.02.33.png

 

Screen Shot 2015-02-05 at 00.05.17.png

 

 

Screen Shot 2015-02-05 at 00.07.19.png

 

Screen Shot 2015-02-05 at 00.08.20.pngScreen Shot 2015-02-05 at 00.10.23.png

Posted on Feb 4, 2015 4:14 PM

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Q: Lost Windows partition after upgrading to Yosemite

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  • by Loner T,

    Loner T Loner T Feb 5, 2015 2:48 PM in response to drfailbadger
    Level 7 (24,601 points)
    Safari
    Feb 5, 2015 2:48 PM in response to drfailbadger

    Let me know if you need the Gdisk commands for the Hybrid MBR.

  • by drfailbadger,

    drfailbadger drfailbadger Feb 5, 2015 2:56 PM in response to Loner T
    Level 1 (0 points)
    Feb 5, 2015 2:56 PM in response to Loner T

    Ok sweet can now boot it as well but will need grab a windows 8 cd from work tomorrow, I can not thank you enough Loner T for all you help. I hope this is recognised by the mac community and you receive some sort of epic reward, as I'm sure with many people on here you have just saved us all a lot of data that could have been lost!!!

  • by Loner T,

    Loner T Loner T Feb 5, 2015 3:12 PM in response to drfailbadger
    Level 7 (24,601 points)
    Safari
    Feb 5, 2015 3:12 PM in response to drfailbadger

    Excellent work, drfailbadger.

     

    Please make a backup of OSX and Windows and use it as a baseline for the future.

  • by scfw0x0f,

    scfw0x0f scfw0x0f Apr 17, 2015 11:05 PM in response to Loner T
    Level 1 (0 points)
    Apr 17, 2015 11:05 PM in response to Loner T

    I think I'm seeing a similar problem (lost access to Windows after Yosemite upgrade), but I have a little different situation.

     

    While my system (MBP 11,1) was still running Mavericks, a while back I used the excellent instructions on how to add a third bootable partition using the hybrid MBR instructions. My partition table looks like this:

     

    Disk /dev/disk0: 977105060 sectors, 465.9 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): 8654C3BA-C230-47F6-A9C4-AC1F5FF234CE

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 977105026

    Partitions will be aligned on 8-sector boundaries

    Total free space is 137 sectors (68.5 KiB)

     

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

      1             40         409639  200.0 MiB  EF00  EFI System Partition

      2         409640      442304239  210.7 GiB  AF00  Customer

      3      442304240      443573775  619.9 MiB  AB00  Recovery HD

      4      443573776      741462231  142.0 GiB  AF05  Work Boot

      5      741462232      742731775  619.9 MiB  AB00  Recovery HD

      6      742731776      977104895  111.8 GiB  0700  BOOTCAMP


    When I first booted after the update with Option held down, I saw only the main boot partition ("Macintosh HD") and the "Work Boot" partition. The first is still Mavericks (10.9.5), the other is Yosemite (10.10.3).


    After some messing about I remembered the commands to at least expose the BOOTCAMP partition:


    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: 5

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

     

    Creating entry for GPT partition #5 (MBR partition #1)

    Enter an MBR hex code (default AB):

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

     

    Unused partition space(s) found. Use one to protect more partitions? (Y/N): n

     

    Recovery/transformation command (? for help): o

     

    Disk size is 977105060 sectors (465.9 GiB)

    MBR disk identifier: 0xD2D65B97

    MBR partitions:

     

    Number  Boot  Start Sector   End Sector   Status      Code

       1      *      741462232    742731775   primary     0xAB

       2                     1    741462231   primary     0xEE

     

    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.


    and got it so that all three show up when I boot with Option, although I only see one recovery partition (labeled Recovery 10.9). But trying to boot the BOOTCAMP partition (which shows up as "Windows" in the alt boot screen) gets me the "Missing operating system_" error.


    Running Repair Disk generates mostly ok output, with the exception of "Invalid Disk Label, cksum error" mismatch errors, e.g.:


    disk0s4: Scan for Volume Headers

    disk0s4: Scan for Disk Labels

    Invalid Disk Label @ 152510496768: cksum mismatch


    Running Repair Disk seems to undo the hybrid partition map (but you probably knew that )


    I'm not sure that that isn't causing additional trouble, as I also got a "Missing operating system_" error on the Work Boot partition at least once after doing those commands and rebooting.


    I have some options:

    * Nothing on the Windows partition was critical, and I should have a full backup on that external disk I mentioned (Windows 7, using the standard Windows backup routine). So nuke-and-pave is an option, if that's simplest–but I've never done that, so pointers would be good.

    * If it's possible to recover what was there, that would be great. As a start, here's the dump from TestDisk 7.0-WIP:


    TestDisk 7.0-WIP, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

     

    Disk /dev/disk0 - 500 GB / 465 GiB - 977105060 sectors (RO)

    Current partition structure:

         Partition                  Start        End    Size in sectors

     

    1 P EFI System                    40     409639     409600 [EFI System Partition]

    2 P Mac HFS                   409640  442304239  441894600 [Customer]

    3 P Mac Boot               442304240  443573775    1269536 [Recovery HD]

    4 P Unknown                443573776  741462231  297888456 [Work Boot]

    5 P Mac Boot               741462232  742731775    1269544 [Recovery HD]

    Warning: number of heads/cylinder mismatches 255 (NTFS) != 1 (HD)

    Warning: number of sectors per track mismatches 63 (NTFS) != 1 (HD)

    6 P MS Data                742731776  977104895  234373120 [BOOTCAMP]

     


    I don't know if that helps you or not.

    * As a last ditch, I have backups of all three partitions (Time Machine for both Mac partitions and a disk image of Work Boot done just before the Yosemite upgrade), so nuke-and-pave for all three is possible. But I'd really, really like to get back to the three partition scheme (personal Mac OS, work Mac OS, personal Windows).


    Any advice would be appreciated.

     

    Thanks!


  • by scfw0x0f,

    scfw0x0f scfw0x0f Apr 17, 2015 11:19 PM in response to scfw0x0f
    Level 1 (0 points)
    Apr 17, 2015 11:19 PM in response to scfw0x0f

    Also, the BOOTCAMP partition shows up in Finder, and the Get Info lists it as NTFS.

  • by scfw0x0f,

    scfw0x0f scfw0x0f Apr 18, 2015 10:24 AM in response to scfw0x0f
    Level 1 (0 points)
    Apr 18, 2015 10:24 AM in response to scfw0x0f

    I got this result from the quick analyse of the drive:

     

    TestDisk 7.0-WIP, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

     

    Disk /dev/rdisk0 - 500 GB / 465 GiB - 977105060 sectors (RO)

     

    The harddisk (500 GB / 465 GiB) seems too small! (< 620 GB / 577 GiB)

    Check the harddisk size: HD jumpers settings, BIOS detection...

     

    The following partitions can't be recovered:

        Partition              Start        End    Size in sectors

    >  MS Data                977104895 1211478014  234373120

      Mac HFS                977105020  978374555    1269536

     

     

     

     

     

     

     

     

     

    [ Continue ]

    NTFS, blocksize=4096, 119 GB / 111 GiB

     

    After hitting CONTINUE:

    TestDisk 7.0-WIP, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

     

    Disk /dev/rdisk0 - 500 GB / 465 GiB - 977105060 sectors (RO)

         Partition               Start        End    Size in sectors

    >P EFI System                    40     409639     409600 [EFI]

    P Mac HFS                   409640  442304239  441894600

    P Mac HFS                442304240  443573775    1269536

    D Mac HFS                523065160  964959759  441894600

    D MS Data                742731776  977104895  234373120

    D Mac HFS                975835488  977105023    1269536

     

     

     

     

     

     

    Structure: Ok.  Use Up/Down Arrow keys to select partition.

    Use Left/Right Arrow keys to CHANGE partition characteristics:

                    P=Primary  D=Deleted

    Keys A: add partition, L: load backup, T: change type, P: list files,

         Enter: to continue

    FAT32, blocksize=512, 209 MB / 200 MiB

     

    Following what Loner T recommended in another thread, I went to the MS Data partition and hit 'P':

    TestDisk 7.0-WIP, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

         MS Data                742731776  977104895  234373120

    Directory /

     

    >dr-xr-xr-x     0     0         0 11-Mar-2015 12:06 .

    dr-xr-xr-x     0     0         0 11-Mar-2015 12:06 ..

    dr-xr-xr-x     0     0         0 18-Mar-2014 20:53 $Recycle.Bin

    dr-xr-xr-x     0     0         0 11-Mar-2015 12:06 Boot

    dr-xr-xr-x     0     0         0 31-Jan-2015 16:16 Config.Msi

    dr-xr-xr-x     0     0         0 23-Oct-2014 17:40 Intel

    dr-xr-xr-x     0     0         0 13-Jul-2009 20:20 PerfLogs

    dr-xr-xr-x     0     0         0  7-Dec-2014 18:00 Program Files

    dr-xr-xr-x     0     0         0 22-Jan-2015 20:24 Program Files (x86)

    dr-xr-xr-x     0     0         0 22-Jan-2015 20:21 ProgramData

    dr-xr-xr-x     0     0         0 18-Mar-2014 20:53 Recovery

    dr-xr-xr-x     0     0         0 11-Mar-2015 12:12 System Volume Information

    dr-xr-xr-x     0     0         0 18-Mar-2014 20:53 Users

    dr-xr-xr-x     0     0         0 23-Jan-2015 04:08 Windows

                                                       Next

    Use Right to change directory, h to hide Alternate Data Stream

        q to quit, : to select the current file, a to select all files

        C to copy the selected files, c to copy the current file

    Part 2:

    TestDisk 7.0-WIP, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

         MS Data                742731776  977104895  234373120

    Directory /

                                                       Previous

    dr-xr-xr-x     0     0         0 13-Jul-2009 20:20 PerfLogs

    dr-xr-xr-x     0     0         0  7-Dec-2014 18:00 Program Files

    dr-xr-xr-x     0     0         0 22-Jan-2015 20:24 Program Files (x86)

    dr-xr-xr-x     0     0         0 22-Jan-2015 20:21 ProgramData

    dr-xr-xr-x     0     0         0 18-Mar-2014 20:53 Recovery

    dr-xr-xr-x     0     0         0 11-Mar-2015 12:12 System Volume Information

    dr-xr-xr-x     0     0         0 18-Mar-2014 20:53 Users

    dr-xr-xr-x     0     0         0 23-Jan-2015 04:08 Windows

    -r--r--r--     0     0      8192 19-Mar-2014 04:03 BOOTSECT.BAK

    -r--r--r--     0     0      2056 18-Mar-2014 20:56 RHDSetup.log

    -r--r--r--     0     0    383786 20-Nov-2010 19:23 bootmgr

    -r--r--r--     0     0         0 19-Mar-2014 07:54 end

    -r--r--r--     0     0 12812943360 12-Mar-2015 22:27 hiberfil.sys

    >-r--r--r--     0     0 2097152000 12-Mar-2015 22:27 pagefile.sys

                                                       Next

    Use Right to change directory, h to hide Alternate Data Stream

        q to quit, : to select the current file, a to select all files

        C to copy the selected files, c to copy the current file

     

    The top 3 numbers:

    TestDisk 7.0-WIP, Data Recovery Utility, April 2015

    Christophe GRENIER <grenier@cgsecurity.org>

    http://www.cgsecurity.org

         MS Data                742731776  977104895  234373120

    Directory /

  • by Loner T,

    Loner T Loner T Apr 18, 2015 10:26 AM in response to scfw0x0f
    Level 7 (24,601 points)
    Safari
    Apr 18, 2015 10:26 AM in response to scfw0x0f

    1. Please post the output of

     

    sudo dd if=/dev/rdisk0sN count=1 2>/dev/null | hexdump -C (where N is the number assigned to the Bootcamp disk slice as seen in diskutil list output).

     

    2. You have two OS X installations, and corresponding Recovery HDs. On a single-disk Mac, this is an invitation to data loss. How is tolerance for data loss? My recommendation is to remove one OS X+Recovery installation and put it on an external disk and boot from it when needed.

     

    3. No hybrid MBR can be crafted which a subsequent software upgrade will not corrupt. Your current configuration is non-standard.

     

    4. You do not need a new MBR (yet!) till the output from step 1 is available.

  • by scfw0x0f,

    scfw0x0f scfw0x0f Apr 18, 2015 10:35 AM in response to Loner T
    Level 1 (0 points)
    Apr 18, 2015 10:35 AM in response to Loner T

    1) dd output:


    Stephens-MacBook-Pro:~ scf$ diskutil list

    /dev/disk0

      #:                      TYPE NAME                    SIZE      IDENTIFIER

      0:      GUID_partition_scheme                        *500.3 GB  disk0

      1:                        EFI EFI                    209.7 MB  disk0s1

      2:                  Apple_HFS Macintosh HD            226.3 GB  disk0s2

      3:                Apple_Boot Recovery HD            650.0 MB  disk0s3

      4:          Apple_CoreStorage                        152.5 GB  disk0s4

      5:                Apple_Boot Recovery HD            650.0 MB  disk0s5

      6:      Microsoft Basic Data BOOTCAMP                120.0 GB  disk0s6

    Stephens-MacBook-Pro:~ scf$ sudo dd if=/dev/rdisk0s6 count=1 2>/dev/null | hexdump -C

    Password:

    00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|

    00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 30 45 2c  |........?....0E,|

    00000020  00 00 00 00 80 00 80 00  ff 3f f8 0d 00 00 00 00  |.........?......|

    00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|

    00000040  f6 00 00 00 01 00 00 00  71 dc 40 04 1f 41 04 fe  |........q.@..A..|

    00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|

    00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|

    00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|

    00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|

    00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|

    000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|

    000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|

    000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|

    000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|

    000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|

    000000f0  68 07 bb 16 68 70 0e 16  68 09 00 66 53 66 53 66  |h...hp..h..fSfSf|

    00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|

    00000110  28 10 b9 d8 0f fc f3 aa  e9 5f 01 90 90 66 60 1e  |(........_...f`.|

    00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|

    00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|

    00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|

    00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|

    00000160  0e 16 00 75 bc 07 1f 66  61 c3 a0 f8 01 e8 09 00  |...u...fa.......|

    00000170  a0 fb 01 e8 03 00 f4 eb  fd b4 01 8b f0 ac 3c 00  |..............<.|

    00000180  74 09 b4 0e bb 07 00 cd  10 eb f2 c3 0d 0a 41 20  |t.............A |

    00000190  64 69 73 6b 20 72 65 61  64 20 65 72 72 6f 72 20  |disk read error |

    000001a0  6f 63 63 75 72 72 65 64  00 0d 0a 42 4f 4f 54 4d  |occurred...BOOTM|

    000001b0  47 52 20 69 73 20 6d 69  73 73 69 6e 67 00 0d 0a  |GR is missing...|

    000001c0  42 4f 4f 54 4d 47 52 20  69 73 20 63 6f 6d 70 72  |BOOTMGR is compr|

    000001d0  65 73 73 65 64 00 0d 0a  50 72 65 73 73 20 43 74  |essed...Press Ct|

    000001e0  72 6c 2b 41 6c 74 2b 44  65 6c 20 74 6f 20 72 65  |rl+Alt+Del to re|

    000001f0  73 74 61 72 74 0d 0a 00  8c a9 be d6 00 00 55 aa  |start.........U.|

    00000200


    2) Yes, it's a MBP I use for work (who does their own nasty stuff to their partition) and personal use. This partition scheme has worked well for over a year, and carrying a separate drive is a PITA (travel, etc.). I'd prefer to keep it as-is for now and keep backing up frequently...


    3) Understood. I *think* at least once I had to go back into gdisk and repeat the steps to rebuild the hybrid MBR.


    4) See above (and thanks!)

  • by Loner T,

    Loner T Loner T Apr 18, 2015 11:21 AM in response to scfw0x0f
    Level 7 (24,601 points)
    Safari
    Apr 18, 2015 11:21 AM in response to scfw0x0f

    Instead of using 5 as the anchor for the Hybrid MBR, I would recommend 4 5 6 and recreate your MBR.

  • by scfw0x0f,

    scfw0x0f scfw0x0f Apr 18, 2015 5:46 PM in response to Loner T
    Level 1 (0 points)
    Apr 18, 2015 5:46 PM in response to Loner T

    Sounds like a plan!

     

    Um, how? I followed the step-by-step instructions to get to where I am...

  • by Loner T,

    Loner T Loner T Apr 18, 2015 5:52 PM in response to scfw0x0f
    Level 7 (24,601 points)
    Safari
    Apr 18, 2015 5:52 PM in response to scfw0x0f

    Look at the question you are asked after you type 'h' to start a new Hybrid MBR.

  • by scfw0x0f,

    scfw0x0f scfw0x0f Apr 18, 2015 9:10 PM in response to Loner T
    Level 1 (0 points)
    Apr 18, 2015 9:10 PM in response to Loner T

    Yeah...that didn't go so well.

     

    In "sudo gdisk /dev/disk0", I did this:

     

    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: 4 5 6

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

     

    Creating entry for GPT partition #4 (MBR partition #1)

    Enter an MBR hex code (default AF):

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

     

    Unused partition space(s) found. Use one to protect more partitions? (Y/N): n

     

    Recovery/transformation command (? for help): p

    Disk /dev/disk0: 977105060 sectors, 465.9 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): 8654C3BA-C230-47F6-A9C4-AC1F5FF234CE

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 977105026

    Partitions will be aligned on 8-sector boundaries

    Total free space is 137 sectors (68.5 KiB)

     

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

      1              40          409639  200.0 MiB  EF00  EFI System Partition

      2          409640      442304239  210.7 GiB  AF00  Customer

      3      442304240      443573775  619.9 MiB  AB00  Recovery HD

      4      443573776      741462231  142.0 GiB  AF05  Work Boot

      5      741462232      742731775  619.9 MiB  AB00  Recovery HD

      6      742731776      977104895  111.8 GiB  0700  BOOTCAMP

     

    Recovery/transformation command (? for help): o

     

    Disk size is 977105060 sectors (465.9 GiB)

    MBR disk identifier: 0xD2D65B97

    MBR partitions:

     

    Number  Boot  Start Sector  End Sector  Status      Code

      1      *      443573776    741462231  primary    0xAF

      2                    1    443573775  primary    0xEE

     

    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


    Rebooting with <option> showed only the Windows partition.


    I suspect I missed something.


    Landru, guide us!


  • by Loner T,

    Loner T Loner T Apr 18, 2015 9:29 PM in response to scfw0x0f
    Level 7 (24,601 points)
    Safari
    Apr 18, 2015 9:29 PM in response to scfw0x0f

    Here is a sample Q&A when 2 3 4 is used. In your case it will shift to 4 5 6. Please ensure you accept the defaults for MBR Hex codes by pressing enter/return.

    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): Press Enter/Return

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

     

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

    Enter an MBR hex code (default AB): Press Enter/Return

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

     

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

    Enter an MBR hex code (default 07): Press Enter/Return

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

  • by scfw0x0f,

    scfw0x0f scfw0x0f Apr 18, 2015 9:57 PM in response to Loner T
    Level 1 (0 points)
    Apr 18, 2015 9:57 PM in response to Loner T

    Are you doing this with Mavericks or Yosemite, or something else? When I run this using gdisk under Mavericks, i get this sequence:

     

    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: 4 5 6

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

     

    Creating entry for GPT partition #4 (MBR partition #1)

    Enter an MBR hex code (default AF):

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

     

    Unused partition space(s) found. Use one to protect more partitions? (Y/N): y

    Note: Default is 0xEE, but this may confuse Mac OS X.

    Enter an MBR hex code (default EE): 07

     

    I don't see the question about Unused partition space(s) in your sequence.

     

    Apparently in the meantime I've really horked things up; the whole disk is no longer recognized by Disk Utility   I'm going nuke-and-pave on the whole disk.

     

    Given that, is it still possible from that point to add the third partition? I could try my original instructions from here: <Re: Repairing Boot Camp after creating new partition>

     

    Argh! (But thanks for trying!)

  • by Loner T,

    Loner T Loner T Apr 19, 2015 4:04 AM in response to scfw0x0f
    Level 7 (24,601 points)
    Safari
    Apr 19, 2015 4:04 AM in response to scfw0x0f

    scfw0x0f wrote:

     

    Are you doing this with Mavericks or Yosemite, or something else? When I run this using gdisk under Mavericks, i get this sequence:

     

    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: 4 5 6

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

    This is incorrect. Do you realize what your answer does to your MBR?

     

    scfw0x0f wrote:

     

    Are you doing this with Mavericks or Yosemite, or something else? When I run this using gdisk under Mavericks, i get this sequence:

     

    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: 4 5 6

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

     

    Creating entry for GPT partition #4 (MBR partition #1)

    Enter an MBR hex code (default AF):

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

     

    Unused partition space(s) found. Use one to protect more partitions? (Y/N): y

    Note: Default is 0xEE, but this may confuse Mac OS X.

    Enter an MBR hex code (default EE): 07

     

    I don't see the question about Unused partition space(s) in your sequence.

    In my case, I do not have a large gap between my GPT entries. Gdisk does not show such a gap. You also seem to answer the same question with a yes and a no, which is incorrect.

    Unused partition space(s) found. Use one to protect more partitions? (Y/N): n

     

    Recovery/transformation command (? for help): p

    Disk /dev/disk0: 977105060 sectors, 465.9 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): 8654C3BA-C230-47F6-A9C4-AC1F5FF234CE

    Partition table holds up to 128 entries

    Please post the output of sudo gpt -vv -r show /dev/disk0.

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