petruzzo

Q: Bootcamp partition missing after resizing primary partition

I installed Windows on a 50gb bootcamp partition, and then found the partition was too small, so I used disk utility to resize the primary partition, and then resized the Windows partition within Windows. When I got back to OS X, it no longer lists BOOTCAMP as a partition in Disk Utility, and instead lists "disk0s3" and reports it's original 50gb size. Windows still boots fine, but it's wonky because OS X tools that access bootcamp, like Paragon Bootcamp Backup and VMware fusion can't interact with it at all and give a bunch of errors.

 

From what I understand, it seems that I can fix the problem by syncing my MBR with my GPT. But, other instructions diverge from my specific situation too fast to keep up with the terminal commands.

 

Can someone help?


sudo gpt -r -vv show disk0

gpt show: disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168

gpt show: disk0: Suspicious MBR at sector 0

gpt show: disk0: Pri GPT at sector 1

gpt show: disk0: Sec GPT at sector 1953525167

       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  1796875000      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

  1797284640        1248        

  1797285888    58583040      3 

  1855868928    97654784      3  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  1953523712        1423        

  1953525135          32         Sec GPT table

  1953525167           1         Sec GPT header

 

 

 

diskutil list

/dev/disk0

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *1.0 TB     disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:                  Apple_HFS Macintosh SSD           920.0 GB   disk0s2

   3:       Microsoft Basic Data                         50.0 GB    disk0s3

iMac 17" i7, Mac OS X (10.6.6)

Posted on Mar 2, 2015 10:53 AM

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Q: Bootcamp partition missing after resizing primary partition

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  • Helpful answers

  • by rkaufmann87,

    rkaufmann87 rkaufmann87 Mar 2, 2015 11:07 AM in response to petruzzo
    Level 9 (58,795 points)
    Photos for Mac
    Mar 2, 2015 11:07 AM in response to petruzzo

    Please re-post in the Boot Camp (note correct spelling) forums. Chances are you did not use the correct tool for re-partitioning

  • by Loner T,

    Loner T Loner T Mar 2, 2015 1:07 PM in response to petruzzo
    Level 7 (24,307 points)
    Safari
    Mar 2, 2015 1:07 PM in response to petruzzo

    Resizing/re-partitioning for a BC/Windows installation is not allowed when using MBRs.

     

    From Boot Camp 5.1: Frequently asked questions - Apple Support

     

    Can I resize the Windows partition after installing Windows?

    No. Back up your important files, then use Boot Camp Assistant to delete the old partition and create a new one.

     

    Please post the output of

     

    sudo fdisk /dev/disk0

    sudo dd if=/dev/rdisk0s3 count=1 2>/dev/null | hexdump -C

  • by petruzzo,

    petruzzo petruzzo Mar 2, 2015 1:14 PM in response to Loner T
    Level 1 (0 points)
    Mar 2, 2015 1:14 PM in response to Loner T

    Thank you. I'll know better next time.

     

    sudo fdisk /dev/disk0

    Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 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 - 1796875000] HFS+     

    *3: 07 1023 254  63 - 1023 254  63 [1797285888 -  156237824] HPFS/QNX/AUX

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

     

    Primarykstation:~ William$ sudo dd if=/dev/rdisk0s3 count=1 2>/dev/null | hexdump -C

     

    00000000  bc c8 10 51 e3 68 e3 68  28 98 02 00 00 00 00 00  |...Q.h.h(.......|

    00000010  a6 03 00 00 ba 07 00 00  08 00 00 00 cc 04 00 00  |................|

    00000020  bc 0a 14 00 02 a8 00 00  15 00 7f b4 04 47 53 02  |.............GS.|

    00000030  1a 66 70 c4 29 d9 c4 36  dd 01 a7 c4 ea f6 a5 01  |.fp.)..6........|

    00000040  7f 19 00 b4 04 47 53 02  1a 66 70 c4 29 d9 c4 36  |.....GS..fp.)..6|

    00000050  dd 01 a7 c4 ea f6 a5 fe  00 01 04 40 01 4d 69 63  |...........@.Mic|

    00000060  72 6f 73 6f 66 74 2d 57  69 6e 64 6f 77 73 2d 43  |rosoft-Windows-C|

    00000070  6c 69 65 6e 74 2d 46 65  61 74 75 72 65 73 2d 50  |lient-Features-P|

    00000080  61 63 6b 61 67 65 2d 41  75 74 6f 4d 65 72 67 65  |ackage-AutoMerge|

    00000090  64 2d 6e 65 74 7e 33 31  62 66 33 38 35 36 61 64  |d-net~31bf3856ad|

    000000a0  33 36 34 65 33 35 7e 61  6d 64 36 34 7e 7e 36 2e  |364e35~amd64~~6.|

    000000b0  33 2e 39 36 30 30 2e 31  36 33 38 34 2e 63 61 74  |3.9600.16384.cat|

    000000c0  7c 15 00 7f b4 06 af 39  ce 20 04 ed c5 72 e4 d6  ||......9. ...r..|

    000000d0  88 16 aa 97 60 b6 d3 83  01 7f 19 00 b4 06 af 39  |....`..........9|

    000000e0  ce 20 04 ed c5 72 e4 d6  88 16 aa 97 60 b6 d3 83  |. ...r......`...|

    000000f0  fe 00 01 04 40 01 4d 69  63 72 6f 73 6f 66 74 2d  |....@.Microsoft-|

    00000100  57 69 6e 64 6f 77 73 2d  43 6c 69 65 6e 74 2d 46  |Windows-Client-F|

    00000110  65 61 74 75 72 65 73 2d  50 61 63 6b 61 67 65 2d  |eatures-Package-|

    00000120  41 75 74 6f 4d 65 72 67  65 64 2d 62 61 73 65 7e  |AutoMerged-base~|

    00000130  33 31 62 66 33 38 35 36  61 64 33 36 34 65 33 35  |31bf3856ad364e35|

    00000140  7e 61 6d 64 36 34 7e 7e  36 2e 33 2e 39 36 30 30  |~amd64~~6.3.9600|

    00000150  2e 31 36 33 38 34 2e 63  61 74 7c 15 00 7f b4 06  |.16384.cat|.....|

    00000160  c5 22 c2 9c e2 08 14 8e  1d 4d a4 01 96 37 a7 93  |.".......M...7..|

    00000170  76 0b 01 7f 19 00 b4 06  c5 22 c2 9c e2 08 14 8e  |v........"......|

    00000180  1d 4d a4 01 96 37 a7 93  76 0b fe 00 01 04 40 01  |.M...7..v.....@.|

    00000190  4d 69 63 72 6f 73 6f 66  74 2d 57 69 6e 64 6f 77  |Microsoft-Window|

    000001a0  73 2d 43 6c 69 65 6e 74  2d 46 65 61 74 75 72 65  |s-Client-Feature|

    000001b0  73 2d 50 61 63 6b 61 67  65 2d 41 75 74 6f 4d 65  |s-Package-AutoMe|

    000001c0  72 67 65 64 2d 62 61 73  65 7e 33 31 62 66 33 38  |rged-base~31bf38|

    000001d0  35 36 61 64 33 36 34 65  33 35 7e 61 6d 64 36 34  |56ad364e35~amd64|

    000001e0  7e 7e 36 2e 33 2e 39 36  30 30 2e 31 36 33 38 34  |~~6.3.9600.16384|

    000001f0  2e 63 61 74 7c 15 00 7f  b4 07 61 92 b7 36 c0 90  |.cat|.....a..6..|

    00000200

     

  • by Loner T,

    Loner T Loner T Mar 2, 2015 1:31 PM in response to petruzzo
    Level 7 (24,307 points)
    Safari
    Mar 2, 2015 1:31 PM in response to petruzzo

    Your GPT has

     

    1797285888    58583040      3

    1855868928    97654784      3  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

    Your MBR has

    *3: 07 1023 254  63 - 1023 254  63 [1797285888 -  156237824] HPFS/QNX/AUX

     

    Notice that the highlighted number in the MBR is not the same as the starting number of the GPT 3 entry. It belongs to the previous entry. The dd for rdisk0s3 uses the GPT entry and does not show the proper NTFS header either.

     

    It is working correctly right now, because your MBR has the correct information, but the GPT does not. Can you download GPT Fdisk (http://sourceforge.net/projects/gptfdisk/) so that the GPT can be corrected. Your MBR should not be manipulated any further till the GPT is corrected. Please do not partition the disk in any way.

  • by petruzzo,

    petruzzo petruzzo Mar 2, 2015 1:42 PM in response to Loner T
    Level 1 (0 points)
    Mar 2, 2015 1:42 PM in response to Loner T

    Thank you. I have downloaded and installed gptfdisk, can you tell me how to proceed? Or which article to read?

  • by Loner T,Helpful

    Loner T Loner T Mar 2, 2015 4:02 PM in response to petruzzo
    Level 7 (24,307 points)
    Safari
    Mar 2, 2015 4:02 PM in response to petruzzo

    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 Fdisk output (and you can verify).

     

    Rebuild GPT4 using start/end offsets

     

    Sudo gdisk /dev/rdisk0

    P  (print the full list of parts)

    D  (delete)

    4  (part 4)

    N  (new part)

    4   (part 4)

    1797285888 offset in bytes  (start point for Bootcamp part)

    +156237824  (Size offset as opposed to End offset)

    0700     (Windows part type)

    P           (print list of all parts just to see what changes will be made)

    W         (Write the new GPT)

    Y           (Yes! really write the new GPT)

      This will delete and re-write the GPT partition info for /dev/disk0s3.

     

    Execute the following command again

    sudo dd if=/dev/rdisk0s3 count=1 2>/dev/null | hexdump -C

    The output should similar to the following (in my case it is rdisk0s4, because I have Recovery HD as GPT 3).

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

    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 e8 71 56  |........?.....qV|

    00000020  00 00 00 00 80 00 80 00  f8 f7 08 1e 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  13 32 6d 13 b7 bb b5 32  |.........2m....2|

    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

  • by petruzzo,

    petruzzo petruzzo Mar 2, 2015 5:08 PM in response to Loner T
    Level 1 (0 points)
    Mar 2, 2015 5:08 PM in response to Loner T

    Thank you. I followed the instructions, however, at the part selection the range was only 1-3 and entering 4 returned an error.

     

    GPT fdisk (gdisk) version 0.8.10

     

    Warning: Devices opened with shared lock will not have their

    partition table automatically reloaded!

    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/rdisk0: 1953525168 sectors, 931.5 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): A9E7B232-0E71-4CB4-8D72-E994587689E5

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 1953525134

    Partitions will be aligned on 8-sector boundaries

    Total free space is 58585717 sectors (27.9 GiB)

     

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

       1              40          409639   200.0 MiB   EF00  EFI System Partition

       2          409640      1797284639   856.8 GiB   AF00  Untitled 1

       3      1855868928      1953523711   46.6 GiB    0700  BOOTCAMP

     

    Command (? for help): d

    Partition number (1-3): 4

    Value out of range

  • by Loner T,Solvedanswer

    Loner T Loner T Mar 2, 2015 5:43 PM in response to petruzzo
    Level 7 (24,307 points)
    Safari
    Mar 2, 2015 5:43 PM in response to petruzzo

    You need to use the following steps (because you have only three GPT entries).

     

    Sudo gdisk /dev/rdisk0

    P  (print the full list of parts)

    D  (delete)

    3  (part 4)

    N  (new part)

    3   (part 4)

    1797285888 offset in bytes  (start point for Bootcamp part)

    +156237824  (Size offset as opposed to End offset)

    0700     (Windows part type)

    P           (print list of all parts just to see what changes will be made)

    W         (Write the new GPT)

    Y           (Yes! really write the new GPT)

      This will delete and re-write the GPT partition info for /dev/disk0s3.

  • by petruzzo,

    petruzzo petruzzo Mar 2, 2015 5:55 PM in response to Loner T
    Level 1 (0 points)
    Mar 2, 2015 5:55 PM in response to Loner T

    Worked perfectly! Thanks so much for the help!

  • by Loner T,

    Loner T Loner T Mar 2, 2015 6:08 PM in response to petruzzo
    Level 7 (24,307 points)
    Safari
    Mar 2, 2015 6:08 PM in response to petruzzo

    Looking at the signature in the OP, you are on SL, so no Recovery HD. Glad to see it work.