MrShady5721

Q: Bootcamp Partition Missing When Booting

Hello, i'm not a Tech Expert but I since I ran out of space on a partition of Windows 10, I went to Disk Utility on Mac OS X El Capitan (Beta), I resized Bootcamp. Restarted my MacBook, I was holding ALT until I see that the Windows Partition was missing and I only saw 'Macintosh HD'. Can anyone help me on this?

MacBook Pro, Other OS

Posted on Jul 30, 2015 10:05 AM

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Q: Bootcamp Partition Missing When Booting

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  • by Loner T,

    Loner T Loner T Jul 30, 2015 10:10 AM in response to MrShady5721
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    Jul 30, 2015 10:10 AM in response to MrShady5721

    Please post the output of the following Terminal commands  from the OSX side?

     

    diskutil list

    diskutil cs list

    sudo gpt -vv -r show /dev/disk0

    sudo fdisk /dev/disk0

     

    The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

  • by MrShady5721,

    MrShady5721 MrShady5721 Jul 30, 2015 10:50 AM in response to Loner T
    Level 1 (0 points)
    Jul 30, 2015 10:50 AM in response to Loner T

    What does it do exactly?

  • by Loner T,

    Loner T Loner T Jul 30, 2015 10:55 AM in response to MrShady5721
    Level 7 (23,598 points)
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    Jul 30, 2015 10:55 AM in response to MrShady5721

    These commands will show the current partition state of your disk.

  • by MrShady5721,

    MrShady5721 MrShady5721 Jul 30, 2015 11:26 AM in response to Loner T
    Level 1 (0 points)
    Jul 30, 2015 11:26 AM in response to Loner T
    • That didn't work, is there another step I need to do? Screen Shot 2015-07-30 at 1.23.24 PM.pngScreen Shot 2015-07-30 at 1.25.55 PM.png
  • by Loner T,

    Loner T Loner T Jul 30, 2015 11:40 AM in response to MrShady5721
    Level 7 (23,598 points)
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    Jul 30, 2015 11:40 AM in response to MrShady5721

    Your GPT output looks reasonable.

     

    Please also run the following command (this shows the Windows NTFS header, if available).

     

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

     

    The commands should individually produce output similar to the following...

     

    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 HD            741.7 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data rMBPBCMP                258.0 GB   disk0s4

     

    diskutil cs list

    No CoreStorage logical volume groups found

     

    sudo gpt -vv -r show /dev/disk0

    Password:

    gpt show: /dev/disk0: mediasize=1000555581440; sectorsize=512; blocks=1954210120

    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 1954210119

           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  1448624648      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      1449034288     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      1450303824        1712        

      1450305536   503904256      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      1954209792         295        

      1954210087          32         Sec GPT table

      1954210119           1         Sec GPT header

     

    sudo fdisk /dev/disk0

    Disk: /dev/disk0 geometry: 121643/255/63 [1954210120 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  54  16 [    409640 - 1448624648] HFS+       

    3: AB 1023  54  17 - 1023  60  39 [1449034288 -    1269536] Darwin Boot

    *4: 07 1023  87  51 - 1023 238   3 [1450305536 -  503904256] HPFS/QNX/AUX

  • by MrShady5721,

    MrShady5721 MrShady5721 Jul 30, 2015 11:56 AM in response to Loner T
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    Jul 30, 2015 11:56 AM in response to Loner T

    Alright, what shall I do next?Screen Shot 2015-07-30 at 1.56.01 PM.png

  • by Loner T,

    Loner T Loner T Jul 30, 2015 12:07 PM in response to MrShady5721
    Level 7 (23,598 points)
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    Jul 30, 2015 12:07 PM in response to MrShady5721

    Please post the output of

     

    sudo fdisk /dev/disk0

  • by MrShady5721,

    MrShady5721 MrShady5721 Jul 30, 2015 12:12 PM in response to Loner T
    Level 1 (0 points)
    Jul 30, 2015 12:12 PM in response to Loner T

    Screen Shot 2015-07-30 at 2.10.29 PM.pngAlright, done that.

  • by Loner T,

    Loner T Loner T Jul 30, 2015 12:18 PM in response to MrShady5721
    Level 7 (23,598 points)
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    Jul 30, 2015 12:18 PM in response to MrShady5721

    The following steps correct the MBR entry #4 which is used by Apple Bootmanager and System Preferences to allow Windows to come up.

     

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

     

    sudo fdisk -e /dev/disk0

    p

    setpid 4

    07

    flag 4

    p

    w

    y

     

    Now reboot your Mac and test.

  • by MrShady5721,

    MrShady5721 MrShady5721 Jul 30, 2015 12:33 PM in response to Loner T
    Level 1 (0 points)
    Jul 30, 2015 12:33 PM in response to Loner T

    Here's what I got.Screen Shot 2015-07-30 at 2.32.24 PM.png

  • by Loner T,

    Loner T Loner T Jul 30, 2015 12:41 PM in response to MrShady5721
    Level 7 (23,598 points)
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    Jul 30, 2015 12:41 PM in response to MrShady5721

    1. Did you use sudo fdisk -e /dev/disk0   ?

    2. You cannot type fdisk inside fdisk.

    3. Type 'p'.

    4. Type 'w'

    5. Type 'y'.

     

    Post the output of sudo fdisk /dev/disk0.

  • by MrShady5721,

    MrShady5721 MrShady5721 Jul 30, 2015 1:19 PM in response to Loner T
    Level 1 (0 points)
    Jul 30, 2015 1:19 PM in response to Loner T

    I tried what you said, it still didn't work.

  • by Loner T,

    Loner T Loner T Jul 30, 2015 1:20 PM in response to MrShady5721
    Level 7 (23,598 points)
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    Jul 30, 2015 1:20 PM in response to MrShady5721

    Post the output of sudo fdisk /dev/disk0

  • by MrShady5721,

    MrShady5721 MrShady5721 Jul 30, 2015 1:28 PM in response to Loner T
    Level 1 (0 points)
    Jul 30, 2015 1:28 PM in response to Loner T

    I tried, it says 'Permission Denied'.

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