ozeegers

Q: bootcamp partition renamed untitled after booting in MacOS

Can anybody please help me ?

 

I had succesfully installed Windows 10 on my Macbook Pro and ran Windows already several weeks smoothly.

Unfortunately I did not make a backup of my windows files yet.

 

Today when I booted to El Capitan to connect my iPad to iTunes Windows gave me a message that it needed repair when I tried to reboot to the bootcamp Windows version.

It did not succeed in repairing and only gave my an advanced options menu.

I booted back into MacOS to find that the windows partition was renamed to 'Untitled' and that no files were visible in Finder.

 

I than ran Disk Utility and selected First Aid on this partition, I thought this was read only to check for disk errors.

Now when booting from Windows it says no operation system available and Disk Utility shows 496 GB empty space on this partition !

 

I hope not all my files are lost !!

What can I do to repair the bootcamp partition ? I tried to install setup bootcamp files on USB but cannot boot from USB (does not show the USB drive)

 

thank you !

 

Olivier

MacBook Pro, OS X El Capitan (10.11.3), Bootcamp Windows 10

Posted on Apr 5, 2016 11:34 AM

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Q: bootcamp partition renamed untitled after booting in MacOS

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  • by Loner T,

    Loner T Loner T Apr 6, 2016 2:30 PM in response to ozeegers
    Level 7 (24,202 points)
    Safari
    Apr 6, 2016 2:30 PM in response to ozeegers

    Shutdown your Mac, boot and hold Command+R together. You should see a Recovery console. In Utilities -> Terminal if csrutil command is not found, your Local Recovery HD is corrupt, otherwise run csrutil disable and check with csrutil status.

  • by ozeegers,

    ozeegers ozeegers Apr 6, 2016 11:28 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 6, 2016 11:28 PM in response to Loner T

    Veerles-MBP:~ vclaeys$ sudo gpt -vv -r show /dev/disk0

    Password:

    gpt show: /dev/disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168

    gpt show: /dev/disk0: Suspicious MBR at sector 0

    gpt show: /dev/disk0: Pri GPT at sector 1

    gpt show: error: bogus map

    gpt show: unable to open device '/dev/disk0': Undefined error: 0

    Veerles-MBP:~ vclaeys$

  • by ozeegers,

    ozeegers ozeegers Apr 6, 2016 11:39 PM in response to ozeegers
    Level 1 (5 points)
    Windows Software
    Apr 6, 2016 11:39 PM in response to ozeegers

    Succesfully disabled System Integrity Protection. Please  restart the machine for the changes to take effect.

  • by ozeegers,

    ozeegers ozeegers Apr 6, 2016 11:43 PM in response to ozeegers
    Level 1 (5 points)
    Windows Software
    Apr 6, 2016 11:43 PM in response to ozeegers

    I probably need to run the following again: sudo gdisk /dev/rdisk0

    but I'll wait your reply just to make sure not to make mistakes....

  • by ozeegers,

    ozeegers ozeegers Apr 8, 2016 2:07 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 8, 2016 2:07 AM in response to Loner T

    Hi Loner T,

     

    Can I let this command run safely to repair the GPT ?

     

    sudo gdisk /dev/rdisk0

     

    thank, Olivier

  • by Loner T,

    Loner T Loner T Apr 8, 2016 9:40 AM in response to ozeegers
    Level 7 (24,202 points)
    Safari
    Apr 8, 2016 9:40 AM in response to ozeegers

    Yes, but if you are able to run Gdisk and see a proper GPT, remember to write it, so the CRC issue will be fixed.

  • by ozeegers,

    ozeegers ozeegers Apr 8, 2016 10:51 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 8, 2016 10:51 AM in response to Loner T

    ok, I get this output:

     

    GPT fdisk (gdisk) version 1.0.1

     

    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):

  • by Loner T,

    Loner T Loner T Apr 8, 2016 10:58 AM in response to ozeegers
    Level 7 (24,202 points)
    Safari
    Apr 8, 2016 10:58 AM in response to ozeegers

    Run 'p'(rint), 'w'(rite), and 'y'(es to confirm) and then retry the gpt command.

  • by ozeegers,

    ozeegers ozeegers Apr 8, 2016 11:13 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 8, 2016 11:13 AM in response to Loner T

    Command (? for help): p

    Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): 0000324C-0DFF-0000-ED08-0000FD0D0000

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 1465149134

    Partitions will be aligned on 8-sector boundaries

    Total free space is 262157 sectors (128.0 MiB)

     

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

       1              40          409639   200.0 MiB   EF00  EFI system partition

       2          409640       538608447   256.6 GiB   AF00  Customer

       3       538608448       539877983   619.9 MiB   AB00  Recovery HD

       4       539877984      1464886983   441.1 GiB   0700  DOS_FAT_32_Untitled_2

     

    Command (? for help):

     

    Command (? for help): w

     

    Warning! Mismatched GPT and MBR partition! MBR partition 4, of type 0x07,

    has no corresponding GPT partition! You may continue, but this condition

    might cause data loss in the future!

     

    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/rdisk0.

    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.

     

    rerun of got command:

     

    Veerles-MBP:~ vclaeys$ sudo gdisk /dev/rdisk0

    Password:

    GPT fdisk (gdisk) version 1.0.1

     

    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):

  • by Loner T,

    Loner T Loner T Apr 8, 2016 11:40 AM in response to ozeegers
    Level 7 (24,202 points)
    Safari
    Apr 8, 2016 11:40 AM in response to ozeegers

    Can you post the output of

     

    sudo gpt -vv -r show /dev/disk0

  • by ozeegers,

    ozeegers ozeegers Apr 8, 2016 11:50 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 8, 2016 11:50 AM in response to Loner T

    looks not good:

     

    Veerles-MBP:~ vclaeys$ sudo gpt -vv -r show /dev/disk0

    Password:

    gpt show: /dev/disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168

    gpt show: /dev/disk0: Suspicious MBR at sector 0

    gpt show: /dev/disk0: Pri GPT at sector 1

    gpt show: error: bogus map

    gpt show: unable to open device '/dev/disk0': Undefined error: 0

     

    i quit disk with 'q' quit without saving changes... was that not right ?

  • by Loner T,

    Loner T Loner T Apr 8, 2016 12:05 PM in response to ozeegers
    Level 7 (24,202 points)
    Safari
    Apr 8, 2016 12:05 PM in response to ozeegers

    Can you reboot and check the command output?

  • by ozeegers,

    ozeegers ozeegers Apr 8, 2016 12:58 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 8, 2016 12:58 PM in response to Loner T

    WHen I boot it says no operating system

    when i boot from cd there is an option to reset the pc and keep files bUT scary !

    what to do?

     

    all my e-mails in Outlook Will be gone

  • by Loner T,

    Loner T Loner T Apr 8, 2016 1:28 PM in response to ozeegers
    Level 7 (24,202 points)
    Safari
    Apr 8, 2016 1:28 PM in response to ozeegers

    We should not try and boot into Windows yet. Let us first address the GPT issue. Do not reset the PC till we come to that point and all other avenues have been exhausted.

  • by ozeegers,

    ozeegers ozeegers Apr 8, 2016 1:34 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 8, 2016 1:34 PM in response to Loner T

    Okay

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