Moseywalk
Level 1 (8 points)
Windows Software

Q: After changing my mac partition, bootcamp can't find windows anymore!

Hello folks,

 

My computer has 2 partitions, Mac os X 10.7.5 and windows 7, I had about 300gb for my Mac and 100gb for windows and 100gb unassigned. So i tried, using the disk utility to make get the Mac partition to use the unassigned space, that didn't work. So i created a third partition for my Mac to use.

 

On trying to reboot into windows, I got a line of text saying no bootable disk could be found. So i went back into Mac and deleted the new partition i had made, hoping this would resolve the problem… it didn't. I'm starting to panic now!

 

TL:DR

 

Orignally had 2 partitions, created a 3rd for Mac, couldn't boot into windows, deleted the new partition, still can't boot into windows, panicking...

Posted on Aug 22, 2016 10:24 AM

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Moseywalk

Q: After changing my mac partition, bootcamp can't find windows anymore!

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  • by Loner T,

    Loner T Loner T Aug 22, 2016 10:26 AM in response to Moseywalk
    Level 7 (23,663 points)
    Safari
    Aug 22, 2016 10:26 AM in response to Moseywalk

    Please post the output of the following OSX Terminal commands.

     

    diskutil list

    sudo fdisk /dev/disk0

    sudo gpt -vv -r show /dev/disk0

     

    Enter your password when prompted by the "sudo" commands.

  • by Moseywalk,

    Moseywalk Moseywalk Aug 22, 2016 10:42 AM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Aug 22, 2016 10:42 AM in response to Loner T

    Gordons-MacBook-Pro:~ Gordo$ diskutil list

    /dev/disk0

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *500.1 GB   disk0

       1:                        EFI                         209.7 MB   disk0s1

       2:                  Apple_HFS Macintosh HD            269.8 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:       Microsoft Basic Data BOOTCAMP                101.2 GB   disk0s4

    Gordons-MacBook-Pro:~ Gordo$ sudo fdisk/dev/disk0

     

    sudo: fdisk/dev/disk0: command not found

     

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

    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 976773167

          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  526876104      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      527285744    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      528555280  250469104        

      779024384  197748736      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      976773120         15        

      976773135         32         Sec GPT table

      976773167          1         Sec GPT header

  • by Loner T,

    Loner T Loner T Aug 22, 2016 10:53 AM in response to Moseywalk
    Level 7 (23,663 points)
    Safari
    Aug 22, 2016 10:53 AM in response to Moseywalk

    The gap between GPT3 and GPT4 usually indicates a 'lost' NTFS header. Can you use El Capitan has deleted my bootcamp windows partition as a references, and download and install Testdisk and GPT Fdisk and start a Testdisk scan and look for MS Data entries. The linked discussion has a sequence of screen shots progressing through Testdisk.

  • by Moseywalk,

    Moseywalk Moseywalk Aug 22, 2016 11:42 AM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Aug 22, 2016 11:42 AM in response to Loner T

    I've installed Testdisk, and i'm looking through the thread you linked. It's still all very complicated (for me) and i'm at a lost on what parts of your solution apply to my situation!

  • by Loner T,

    Loner T Loner T Aug 22, 2016 11:48 AM in response to Moseywalk
    Level 7 (23,663 points)
    Safari
    Aug 22, 2016 11:48 AM in response to Moseywalk

    We are looking for a NTFS entry which falls in this highlighted gap.

     

    527285744    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

    528555280  250469104        

    779024384  197748736      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

    In the linked thread, you start Testdisk as

     

    sudo testdisk /dev/rdisk0

     

    This assumes that testdisk binary is in your current directory. Modify the path to ensure it is in the correct directory.

  • by Moseywalk,

    Moseywalk Moseywalk Aug 22, 2016 12:50 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Aug 22, 2016 12:50 PM in response to Loner T

    The:

     

    sudo testdisk /dev/rdisk0

     

    command doesn't work… which means i have to change the directory path? Another thing i don't know how to do!

     

    I really sorry but I find all these terminal operations darn-right confusing and a bit scary.

     

    Can i not just double click the testdisk to start results shown below

    Screen Shot 2016-08-22 at 20.43.54.png

    I am really sorry but i can't make heads or tails of your other answer, if you could walk-me-through the solution i would be very grateful.

  • by Loner T,

    Loner T Loner T Aug 22, 2016 12:56 PM in response to Moseywalk
    Level 7 (23,663 points)
    Safari
    Aug 22, 2016 12:56 PM in response to Moseywalk

    In the Terminal window, press Enter on the Create option. Post a screen shot of the Terminal Window on the next screen.

  • by Moseywalk,

    Moseywalk Moseywalk Aug 22, 2016 1:01 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Aug 22, 2016 1:01 PM in response to Loner T

    here we are

    Screen Shot 2016-08-22 at 21.00.30.png

  • by Loner T,

    Loner T Loner T Aug 22, 2016 1:07 PM in response to Moseywalk
    Level 7 (23,663 points)
    Safari
    Aug 22, 2016 1:07 PM in response to Moseywalk

    Choose/highlight  /dev/rdisk0 and press Enter on Proceed.

  • by Moseywalk,

    Moseywalk Moseywalk Aug 22, 2016 1:11 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Aug 22, 2016 1:11 PM in response to Loner T

    after clicking enter twice,

     

    Screen Shot 2016-08-22 at 21.10.18.png

  • by Loner T,

    Loner T Loner T Aug 22, 2016 1:25 PM in response to Moseywalk
    Level 7 (23,663 points)
    Safari
    Aug 22, 2016 1:25 PM in response to Moseywalk

    Using up/down arrow/cursor keys can change what you highlight. You do not need to press enter/return to select/highlight. Extra return/enter can sometimes cause more problems.

     

    With EFI/GPT highlighted, press Enter/Return once. Post the next screen shot.

  • by Moseywalk,

    Moseywalk Moseywalk Aug 22, 2016 1:30 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Aug 22, 2016 1:30 PM in response to Loner T

    Screen Shot 2016-08-22 at 21.30.05.png

  • by Loner T,

    Loner T Loner T Aug 22, 2016 1:32 PM in response to Moseywalk
    Level 7 (23,663 points)
    Safari
    Aug 22, 2016 1:32 PM in response to Moseywalk

    Press Return to Analyse.

  • by Moseywalk,

    Moseywalk Moseywalk Aug 22, 2016 1:34 PM in response to Loner T
    Level 1 (8 points)
    Windows Software
    Aug 22, 2016 1:34 PM in response to Loner T

    Screen Shot 2016-08-22 at 21.34.07.png

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