Sanjaya83

Q: Can't boot into windows after resizing partitions

I tried to resize my bootcamp and mac partitions recently

I cannot boot into windows now

Get an error about missing MBR

Do you think you could help me here?

I read about using GPT fdisk on another thread

These are the results I got from it

Wanted to check before doing anything

 

Sanjayas-MacBook-Pro:~ sanjaya83$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 38913/255/63 [625142448 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: AF 1023 254  63 - 1023 254  63 [    409640 -  349609376] HFS+      

3: AB 1023 254  63 - 1023 254  63 [ 350019016 -    1269536] Darwin Boot

4: 0C 1023 254  63 - 1023 254  63 [ 351289344 -  273852416] Win95 FAT32L

Sanjayas-MacBook-Pro:~ sanjaya83$ sudo gdisk /dev/disk0

GPT fdisk (gdisk) version 1.0.1

 

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

NOTE: Write test failed with error number 1. It will be impossible to save

changes to this disk's partition table!

You may need to deactivate System Integrity Protection to use this program. See

https://www.quora.com/How-do-I-turn-off-the-rootless-in-OS-X-El-Capitan-10-11

for more information.

 

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: 625142448 sectors, 298.1 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 55739070-E42E-4414-947D-F1AAD2EB65D0

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 625142414

Partitions will be aligned on 8-sector boundaries

Total free space is 1453 sectors (726.5 KiB)

 

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

   1              40          409639   200.0 MiB   EF00  EFI System Partition

   2          409640       350019015   166.7 GiB   AF00  Customer

   3       350019016       351288551   619.9 MiB   AB00  Recovery HD

   4       351289344       625141759   130.6 GiB   0700  BOOTCAMP

 

Command (? for help):

MacBook Pro (13-inch Early 2011), OS X El Capitan (10.11.1)

Posted on Dec 1, 2015 5:12 PM

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Q: Can't boot into windows after resizing partitions

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  • by jeroengast,

    jeroengast jeroengast Dec 1, 2015 5:19 PM in response to Sanjaya83
    Level 1 (0 points)
    Dec 1, 2015 5:19 PM in response to Sanjaya83

    From my 5 hours of experience with the gdisk commands, etc, rebuilding your MBR is, if done correctly like the tutorials say step by step, sorta safe. Don't take my word for it at all, but I had no problems. Then again, I don't really have any experience at all. Please allow someone else to answer this as well.

     

    Good thing you're checking beforehand.

     

    Jeroen M.

  • by Loner T,

    Loner T Loner T Dec 1, 2015 5:19 PM in response to Sanjaya83
    Level 7 (23,608 points)
    Safari
    Dec 1, 2015 5:19 PM in response to Sanjaya83

    Please post the output of

     

    sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

  • by Sanjaya83,

    Sanjaya83 Sanjaya83 Dec 1, 2015 6:32 PM in response to Loner T
    Level 1 (0 points)
    Dec 1, 2015 6:32 PM in response to Loner T

    Command (? for help): q

    Sanjayas-MacBook-Pro:~ sanjaya83$ sudo dd if=/dev/rdisk0s4 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 40 f0 14  |........?....@..|

    00000020  00 00 00 00 80 00 80 00  f8 37 e1 0b 00 00 00 00  |.........7......|

    00000030  77 eb 5c 00 00 00 00 00  2b 00 00 00 00 00 00 00  |w.\.....+.......|

    00000040  f6 00 00 00 01 00 00 00  60 9d f8 3e d9 fb d0 01  |........`..>....|

    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

    Sanjayas-MacBook-Pro:~ sanjaya83$

  • by Loner T,Solvedanswer

    Loner T Loner T Dec 2, 2015 7:47 PM in response to Sanjaya83
    Level 7 (23,608 points)
    Safari
    Dec 2, 2015 7:47 PM in response to Sanjaya83

    You have El Capitan, so we need to disable SIP.

     

    1. Boot into Local Recovery (Command+R).

    2. Start Utilities -> Terminal.

    3. Type csrutil disable in Terminal and press Enter/Return.

    4. Type csrutil status.

    5. Boot normally, and type csrutil status to confirm that all individual entries are still disabled.

     

    Please ignore the i386 MBR error message, but not any others, in the following steps.

     

    sudo fdisk -e /dev/disk0

    p

    setpid 4

    07

    flag 4

    p

    w

    y

     

     

    Reboot and test.

  • by Sanjaya83,

    Sanjaya83 Sanjaya83 Dec 2, 2015 7:47 PM in response to Loner T
    Level 1 (0 points)
    Dec 2, 2015 7:47 PM in response to Loner T

    You are the man my friend Loner T

    It worked perfect

    And writing this from my Windows Bootcamp

  • by Loner T,

    Loner T Loner T Dec 2, 2015 9:19 PM in response to Sanjaya83
    Level 7 (23,608 points)
    Safari
    Dec 2, 2015 9:19 PM in response to Sanjaya83

    Please re-enable SIP, backup Windows, OSX and create a Windows System Restore point.

  • by TaxiService,

    TaxiService TaxiService Dec 12, 2015 7:19 AM in response to Loner T
    Level 1 (0 points)
    Dec 12, 2015 7:19 AM in response to Loner T

    Hello. I have a very similar issue. These are the dump reports of my disk. Is it safe to do what's described in this thread?

     

    Backstory: I had a mavericks partition and a win7 bootcamp partition.

    After upgrading to El Capitan, the bootcamp partition would show the "NO BOOTABLE DEVICE" screen.

    I erased and resized the OSX partition, shrinking it to 250GB. This created a new Untitled partition. At this point i reinstalled El Capitan on the 250GB partition, and the bootcamp partition disappeared from the alt boot menu altogether.

    In the end I will have to unite the Untitled and windows partitions, but for now i just need to boot into windows again.

     

     

    diskutil list

    /dev/disk0 (internal, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *500.1 GB   disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:                  Apple_HFS Taxi HD                 250.0 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:                  Apple_HFS Untitled                83.1 GB    disk0s4

       5:       Microsoft Basic Data BOOTCAMP                166.0 GB   disk0s5

     

    diskutil cs list

    No CoreStorage logical volume groups found

     

    sudo gpt -vv -r show /dev/disk0

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

    gpt show: /dev/disk0: PMBR 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         PMBR

              1          1         Pri GPT header

              2         32         Pri GPT table

             34          6        

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

         409640  488281248      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      488690888    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      489960424  162333720      4  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      652294144     262144        

      652556288  324216832      5  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      976773120         15        

      976773135         32         Sec GPT table

      976773167          1         Sec GPT header

     

    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 1023 254  63 - 1023 254  63 [         1 -  976773167] <Unknown ID>

    2: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

    3: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

    4: 00    0   0   0 -    0   0   0 [         0 -          0] unused

     

    Thanks in advance. ...and I hope this was the right place to post this!

  • by Loner T,

    Loner T Loner T Dec 12, 2015 7:56 AM in response to TaxiService
    Level 7 (23,608 points)
    Safari
    Dec 12, 2015 7:56 AM in response to TaxiService

    Please post the output of

     

    sudo dd if=/dev/rdisk0s5 count=1 2>/dev/null | hexdump -C

     

    Do not use the solution steps described in this discussion. They are not appropriate for your situation.

  • by TaxiService,

    TaxiService TaxiService Dec 12, 2015 8:06 AM in response to Loner T
    Level 1 (0 points)
    Dec 12, 2015 8:06 AM in response to Loner T

    Ok, here it is:

     

    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 38 e5 26  |........?....8.&|

    00000020  00 00 00 00 80 00 80 00  ff 27 53 13 00 00 00 00  |.........'S.....|

    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  74 8e da 62 98 da 62 84  |........t..b..b.|

    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 4a 44 42 46 5a  |occurred...JDBFZ|

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

    000001c0  4a 44 42 46 5a 20 20 20  69 73 20 63 6f 6d 70 72  |JDBFZ   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

  • by Loner T,

    Loner T Loner T Dec 12, 2015 8:45 AM in response to TaxiService
    Level 7 (23,608 points)
    Safari
    Dec 12, 2015 8:45 AM in response to TaxiService

    What is the version of Windows? What year/model is your Mac?

  • by TaxiService,

    TaxiService TaxiService Dec 12, 2015 8:54 AM in response to Loner T
    Level 1 (0 points)
    Dec 12, 2015 8:54 AM in response to Loner T

    Windows 7 64-bit... probably the Professional version..? I am not really sure. Is there a way to find out what version it is? The mac is a macbookpro6,2 from mid-2010.

     

    EDIT: It's actually Windows 7 Ultimate. Is this the information you were looking for, though?

  • by Loner T,

    Loner T Loner T Dec 12, 2015 9:16 AM in response to TaxiService
    Level 7 (23,608 points)
    Safari
    Dec 12, 2015 9:16 AM in response to TaxiService

    The following steps are non-standard because there is a third user-visible partition. Typically, there are two such partitions in a normal configuration on a single-disk Mac with OS X and Bootcamp. This is fragile and lack of proper backups can lead to potential data loss. Download GPT Fdisk from http://sourceforge.net/projects/gptfdisk/ and install it on the OS X side. The following steps are executed when booted in OS X. If the 83.1G is converted to Free Space, these numbers (3 4 5) will change back to (2 3 4).

     

    El Capitan requires disabling SIP to manipulate partitions. This will not work if you boot into Internet Recovery (Command+Opt+R), but only works in Local Recovery (Command+R).

     

    1. Boot into Local Recovery (Command+R).

    2. Start Utilities -> Terminal.

    3. Type csrutil disable in Terminal and press Enter/Return.

    4. Type csrutil status.

    5. Boot normally, and type csrutil status to confirm that all individual entries are still disabled.

     

    Once SIP is disabled, 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 10. Accept all other defaults that Gdisk offers. Please see the sample Q&A as an example. These steps can be repeated if you make a mistake before you get to Step 12, otherwise start from Step 1 for these steps. Step 6 has numbers which are typed with a space between the numbers. Please see the sample Q&A before you execute these steps.

    1. Sudo gdisk /dev/rdisk0
    2. P  (Print list of parts)
    3. R  (Recover)
    4. O (print current Hybrid MBR)
    5. H (chooses Hybrid)
    6. Partitions numbers to be hybridized: 3 4 5
    7. Y  (Good for GRUB question)
    8. N  (part 3 boot flag)
    9. N  (part 4 boot flag)
    10. Y  (part 5 boot flag make NTFS bootable partition)
    11. O  (print current Hybrid MBR)
    12. W (Write the new MBR)
    13. Y (Yes! write the new MBR)
    14. Reboot

     

    Here is sample Q&A for this section. Please notice the Press Enter/Return. Accept defaults offered by Gdisk.

     

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

     

    Creating entry for GPT partition #3 (MBR partition #2)

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

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

     

    Creating entry for GPT partition #4 (MBR partition #3)

    Enter an MBR hex code (default AB or 0B or 0C): Press Enter/Return

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

     

    Creating entry for GPT partition #5 (MBR partition #4)

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

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


    Reference links - Bootcamp disappears after creating third partition and My Windows partition is not bootable after create a new partition .

  • by TaxiService,

    TaxiService TaxiService Dec 12, 2015 9:42 AM in response to Loner T
    Level 1 (0 points)
    Dec 12, 2015 9:42 AM in response to Loner T

    You've been so helpful, Loner T! But before doing what you described, would it be better if i removed the Untitled partition? I mean, i've never really wished for it to exist. It just kind of appeared when I shrunk the original osx partition. In the end i'd like to end up with a single, bigger boot camp partition. I've read about the possibility to convert the thing to Free Space, but i can't seem to find a way to do that. Shouldn't it be in disk utility?

     

    What I mean is: if I do these things, will it make it harder for me to make a bootcamp partition from scratch, at a later date?
    and also, while i'm at it, is there a way to "merge" the Untitled and BOOTCAMP partitions?

     

    Also thank you so much for your time, man!

  • by Loner T,

    Loner T Loner T Dec 12, 2015 9:45 AM in response to TaxiService
    Level 7 (23,608 points)
    Safari
    Dec 12, 2015 9:45 AM in response to TaxiService

    El Capitan DU is a real pain. You can can use OSX Terminal and convert GPT4 to Free Spaces and use Gparted to absorb it and repair Windows. If you do not run into any issues, then you will have a standard configuration and can use the same steps and use 2 3 4 instead of 3 4 5 and it should behave better.

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