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 10, 2016 11:00 AM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 10, 2016 11:00 AM in response to ozeegers

    Let me get connected via my Mac. Will post in a couple of hours.

  • by ozeegers,

    ozeegers ozeegers Apr 10, 2016 11:47 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 10, 2016 11:47 AM in response to Loner T

    Alright thank you, I've tried to look it up but too risky without appropriate knowledge....

  • by Loner T,

    Loner T Loner T Apr 10, 2016 3:34 PM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 10, 2016 3:34 PM in response to ozeegers

    Here is an example - Re: Unable to boot into mac or bootcamp . Please disable SIP, it it is not already disabled.  You will repeat step A, because it is generic.

     

    Step B. will have your values, which you should verify/match with your GDisk 'p' command output.

     

    sudo gdisk /dev/rdisk0

    x

    l (This is is lower case L )

    1 (This is digit 1 )

    m (Go to main menu)

    n (New)

    1

    40

    409639

    EF00

    n

    2

    409640

    538608447

    AF00

    n

    3

    538608448

    539877983

    AB00

    n

    4

    539877984

    1464886983

    0700

    p

    w

    y

  • by ozeegers,

    ozeegers ozeegers Apr 11, 2016 12:09 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 11, 2016 12:09 AM in response to Loner T

    output from gdisk p command:

     

    Command (? for help): p

    Disk /dev/disk0: 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

  • by ozeegers,

    ozeegers ozeegers Apr 11, 2016 12:22 AM in response to ozeegers
    Level 1 (5 points)
    Windows Software
    Apr 11, 2016 12:22 AM in response to ozeegers

    partition number out of range ! should there be a preceding 'o' command (create a new GPT) ?

     

    Command (? for help): x
    
    Expert command (? for help): ?
    a set attributes
    c change partition GUID
    d display the sector alignment value
    e relocate backup data structures to the end of the disk
    g change disk GUID
    h recompute CHS values in protective/hybrid MBR
    i show detailed information on a partition
    l set the sector alignment value
    m return to main menu
    n create a new protective MBR
    o print protective MBR data
    p print the partition table
    q quit without saving changes
    r recovery and transformation options (experts only)
    s resize partition table
    t transpose two partition table entries
    u replicate partition table on new device
    v verify disk
    w write table to disk and exit
    z zap (destroy) GPT data structures and exit
    ? print this menu
    
    Expert command (? for help): l
    Enter the sector alignment value (1-65536, default = 2048): 1
    
    Expert command (? for help): m
    
    Command (? for help): n
    Partition number (5-128, default 5): 1
    Value out of range
    Partition number (5-128, default 5):
    
    
  • by Loner T,

    Loner T Loner T Apr 11, 2016 7:59 AM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 11, 2016 7:59 AM in response to ozeegers

    You have not run step A yet, and created a new GPT.

  • by ozeegers,

    ozeegers ozeegers Apr 11, 2016 8:36 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 11, 2016 8:36 AM in response to Loner T

    okay, and I need to use rdisk0 instead of disk0 ? could you explain why that is ? thanks

  • by Loner T,

    Loner T Loner T Apr 11, 2016 8:41 AM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 11, 2016 8:41 AM in response to ozeegers

    For Step A, you can use either. To be consistent, use the same for both steps A and B.

  • by ozeegers,

    ozeegers ozeegers Apr 11, 2016 9:42 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 11, 2016 9:42 AM in response to Loner T

    Disk /dev/rdisk0: 1465149168 sectors, 698.6 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): BE924D70-1CD5-4EDB-9B44-947B2100D347

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 1465149134

    Partitions will be aligned on 1-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

       2          409640       538608447   256.6 GiB   AF00  Apple HFS/HFS+

       3       538608448       539877983   619.9 MiB   AB00  Recovery HD

       4       539877984      1464886983   441.1 GiB   0700  Microsoft basic data

     

    Screen Shot 2016-04-11 at 18.42.06.png

    in finder Untitled visible but no files.... files on Macintosh HD intact....

     

    is this worrisome ?

  • by Loner T,

    Loner T Loner T Apr 11, 2016 1:12 PM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 11, 2016 1:12 PM in response to ozeegers

    What is the output of 

     

    sudo gpt -vv -r show /dev/disk0

     

    Right now, your MBR is configured to show NTFS. We can modify one value and see if FAT32 brings back any files.

  • by ozeegers,

    ozeegers ozeegers Apr 11, 2016 10:12 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 11, 2016 10:12 PM in response to Loner T

    sudo gpt -vv -r show /dev/disk0

    Password:

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

    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 1465149167

           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   538198808      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

       538608448     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

       539877984   925009000      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      1464886984      262151        

      1465149135          32         Sec GPT table

      1465149167           1         Sec GPT header

  • by ozeegers,

    ozeegers ozeegers Apr 11, 2016 10:20 PM in response to ozeegers
    Level 1 (5 points)
    Windows Software
    Apr 11, 2016 10:20 PM in response to ozeegers

    don't i see files because El Capitan is not able to read and write NTFS ?

    see http://macdrug.com/free-ntfs-read-and-write-solutions-in-mac-os-x-el-capitan-or- older/

  • by Loner T,

    Loner T Loner T Apr 12, 2016 5:48 AM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 12, 2016 5:48 AM in response to ozeegers

    There is a read-only KEXT for NTFS in OS X. It can also write, but is disabled by default. If you feel adventurous, please see http://www.cnet.com/news/how-to-manually-enable-ntfs-read-and-write-in-os-x/ .

     

    The issue you have is that the partition is FAT, not NTFS. Have you used Testdisk in the past?

  • by ozeegers,

    ozeegers ozeegers Apr 12, 2016 11:12 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 12, 2016 11:12 PM in response to Loner T

    sorry, I do not have any experience with mac OS until now.

    Used to have windows machines since my youth...

    getting to like the mac OS though..

     

    I have read about testdisk in the other post....

     

    what do I do with it ? I am really anxious to be able to reach my emails on my bootcamp windows again..

     

    thank you

  • by ozeegers,

    ozeegers ozeegers Apr 13, 2016 12:07 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 13, 2016 12:07 AM in response to Loner T

    can you provide me with a link to the download of testdisk ? I downloaded a version that cannot be run ?

     

    Is this also a command that should be run from within terminal or should I start it by double click on its icon ?

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