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 ozeegers,

    ozeegers ozeegers Apr 23, 2016 12:10 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 23, 2016 12:10 PM in response to Loner T

    Hello Loner T,

     

    I did the things mentioned above, but halas, the drive is not showing up in finder nor is it visible as startup disk.

    Was this the last possible option ?

     

    I'd better format the whole disk and put El Capitan on it and then bootcamp ?

  • by Loner T,

    Loner T Loner T Apr 23, 2016 12:17 PM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 23, 2016 12:17 PM in response to ozeegers

    Please post the output of

     

    sudo gpt -vv -r show /dev/disk0

    sudo fdisk /dev/disk0

  • by ozeegers,

    ozeegers ozeegers Apr 23, 2016 12:39 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 23, 2016 12:39 PM in response to Loner T

    sudo gpt -vv -r show /dev/disk0


    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: /dev/disk0: Sec GPT at sector 1465149167

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

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

       539877984        1440        

       539879424   385386497      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

       925265921   539883214        

      1465149135          32         Sec GPT table

      1465149167           1         Sec GPT header

     

     


    sudo gpt -vv -r show /dev/disk0

     

    Disk: /dev/disk0 geometry: 91201/255/63 [1465149168 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 -  538198808] HFS+       

    3: AB 1023 254  63 - 1023 254  63 [ 538608448 -    1269536] Darwin Boot

    *4: 07 1023 254  63 - 1023 254  63 [ 539879424 -  385386497] HPFS/QNX/AUX

  • by Loner T,

    Loner T Loner T Apr 23, 2016 1:09 PM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 23, 2016 1:09 PM in response to ozeegers

    This is incorrect. You forgot the "+" sign in front of the value in step 8 in the first set of Gdisk steps. Can you repeat the steps again?

  • by ozeegers,

    ozeegers ozeegers Apr 23, 2016 10:58 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 23, 2016 10:58 PM in response to Loner T

    oops, yes indeed i forgot the plus sign....

     

    now entered the first part correctly but I get this error on the second part:

     

    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 8-sector boundaries

    Total free space is 5237 sectors (2.6 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

       6       539879424      1465145343   441.2 GiB   0700  Microsoft basic data

     

    Command (? for help): R

     

    Recovery/transformation command (? for help): O

     

    Disk size is 1465149168 sectors (698.6 GiB)

    MBR disk identifier: 0x4DD05DE5

    MBR partitions:

     

    Number  Boot  Start Sector   End Sector   Status      Code

       1                     1       409639   primary     0xEE

       2                409640    538608447   primary     0xAF

       3             538608448    539877983   primary     0xAB

     

    Recovery/transformation command (? for help): H

     

    WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one,

    just hit the Enter key at the below prompt and your MBR partition table will

    be untouched.

     

    Type from one to three GPT partition numbers, separated by spaces, to be

    added to the hybrid MBR, in sequence: 2 3 4

    Place EFI GPT (0xEE) partition first in MBR (good for GRUB)? (Y/N): Y

     

    Creating entry for GPT partition #2 (MBR partition #2)

    Enter an MBR hex code (default AF):

    Set the bootable flag? (Y/N): N

     

    Creating entry for GPT partition #3 (MBR partition #3)

    Enter an MBR hex code (default AB):

    Set the bootable flag? (Y/N): N

     

    GPT partition #4 does not exist or is too big; skipping.

     

    Unused partition space(s) found. Use one to protect more partitions? (Y/N):

  • by ozeegers,

    ozeegers ozeegers Apr 23, 2016 10:59 PM in response to ozeegers
    Level 1 (5 points)
    Windows Software
    Apr 23, 2016 10:59 PM in response to ozeegers

    this is the output of the first part:

     

    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): P

    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 8-sector boundaries

    Total free space is 539884660 sectors (257.4 GiB)

     

    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       539879424       925265920   183.8 GiB   0700  Microsoft basic data

     

    Command (? for help): D

    Partition number (1-4): 4

     

    Command (? for help): N

    Partition number (4-128, default 4): 6

    First sector (34-1465149134, default = 539877984) or {+-}size{KMGTP}: 539879424

    Last sector (539879424-1465149134, default = 1465149134) or {+-}size{KMGTP}: +925265920

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): 0700

    Changed type of partition to 'Microsoft basic data'

     

    Command (? for help): P

    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 8-sector boundaries

    Total free space is 5237 sectors (2.6 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

       6       539879424      1465145343   441.2 GiB   0700  Microsoft basic data

     

    Command (? for help): W

     

    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.

  • by Loner T,

    Loner T Loner T Apr 24, 2016 7:07 AM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 24, 2016 7:07 AM in response to ozeegers

    Reboot and run the second set. The OS X kernel partition table copy is out of sync with the disk version.

  • by ozeegers,

    ozeegers ozeegers Apr 24, 2016 7:43 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 24, 2016 7:43 AM in response to Loner T

    I rebooted and ran the second set. Same error ?

  • by Loner T,

    Loner T Loner T Apr 24, 2016 7:45 AM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 24, 2016 7:45 AM in response to ozeegers

    Can you post the output of

     

    sudo gpt -vv -r show /dev/disk0

  • by ozeegers,

    ozeegers ozeegers Apr 24, 2016 7:47 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 24, 2016 7:47 AM in response to Loner T

    sudo gpt -vv -r show /dev/disk0

    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: /dev/disk0: Sec GPT at sector 1465149167

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

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

       539877984        1440        

       539879424   925265920      6  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      1465145344        3791        

      1465149135          32         Sec GPT table

      1465149167           1         Sec GPT header

  • by Loner T,

    Loner T Loner T Apr 24, 2016 8:03 AM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 24, 2016 8:03 AM in response to ozeegers

    You typed

    Command (? for help): N

    Partition number (4-128, default 4): 6

    First sector (34-1465149134, default = 539877984) or {+-}size{KMGTP}: 539879424

    Last sector (539879424-1465149134, default = 1465149134) or {+-}size{KMGTP}: +925265920

     

    which became

    539879424  925265920      6  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

    so when you type 2 3 4, there is no GPT 4, which is why it is failing. Can you repeat the first and second set of steps?

  • by ozeegers,

    ozeegers ozeegers Apr 24, 2016 11:48 AM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 24, 2016 11:48 AM in response to Loner T

    oops, my concentration below zerO.... i am so sorry

     

    will try again

  • by ozeegers,

    ozeegers ozeegers Apr 24, 2016 12:02 PM in response to ozeegers
    Level 1 (5 points)
    Windows Software
    Apr 24, 2016 12:02 PM in response to ozeegers

    This time I entered everything correctly but the partition does not show up in Finder.

    When I reboot it does give me the option to boot the windows partition but it says missing operating system..

     

    this is the output of got -vv -r show /dev/disk0

     

     

     

    Oliviers-MBP:~ ozeegers$ 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: /dev/disk0: Sec GPT at sector 1465149167

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

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

       539877984        1440        

       539879424   925265920      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      1465145344        3791        

      1465149135          32         Sec GPT table

      1465149167           1         Sec GPT header

  • by Loner T,

    Loner T Loner T Apr 24, 2016 12:18 PM in response to ozeegers
    Level 7 (24,611 points)
    Safari
    Apr 24, 2016 12:18 PM in response to ozeegers

    Can you post the output of

     

    sudo fdisk /dev/disk0

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

  • by ozeegers,

    ozeegers ozeegers Apr 24, 2016 12:39 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 24, 2016 12:39 PM in response to Loner T

    sudo fdisk /dev/disk0

    Password:

    Disk: /dev/disk0 geometry: 91201/255/63 [1465149168 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 -  538198808] HFS+       

    3: AB 1023 254  63 - 1023 254  63 [ 538608448 -    1269536] Darwin Boot

    *4: 07 1023 254  63 - 1023 254  63 [ 539879424 -  925265920] HPFS/QNX/AUX

     

     

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

    00000000  00 00 00 40 00 00 00 20  00 00 00 00 00 00 00 00  |...@... ........|

    00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 20  |............... |

    00000020  00 00 00 00 00 00 00 00  00 00 00 30 00 00 00 00  |...........0....|

    00000030  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

    00000040  00 00 00 00 00 00 00 00  00 00 00 e0 00 00 00 60  |...............`|

    00000050  00 00 00 00 00 00 00 80  00 00 00 70 00 00 00 00  |...........p....|

    00000060  00 00 00 60 00 00 00 10  00 00 00 80 00 00 00 40  |...`...........@|

    00000070  00 00 00 70 00 00 00 b0  00 00 00 10 00 00 00 f0  |...p............|

    00000080  00 00 00 00 00 00 00 00  00 00 00 d0 00 00 00 e0  |................|

    00000090  00 00 00 00 00 00 00 10  00 00 00 f0 00 00 00 10  |................|

    000000a0  00 00 00 10 00 00 00 70  00 00 00 00 00 00 00 a0  |.......p........|

    000000b0  00 00 00 20 00 00 00 10  00 00 00 b0 00 00 00 c0  |... ............|

    000000c0  00 00 00 10 00 00 00 00  00 00 00 f0 00 00 00 e0  |................|

    000000d0  00 00 00 c0 00 00 00 00  00 00 00 60 00 00 00 20  |...........`... |

    000000e0  00 00 00 50 00 00 00 70  00 00 00 00 00 00 00 10  |...P...p........|

    000000f0  00 00 00 10 00 00 00 10  00 00 00 60 00 00 00 60  |...........`...`|

    00000100  00 00 00 10 00 00 00 60  00 00 00 c0 00 00 00 b0  |.......`........|

    00000110  00 00 00 f0 00 00 00 a0  00 00 00 90 00 00 00 10  |................|

    00000120  00 00 00 10 00 00 00 00  00 00 00 60 00 00 00 00  |...........`....|

    00000130  00 00 00 00 00 00 00 00  00 00 00 b0 00 00 00 00  |................|

    00000140  00 00 00 80 00 00 00 60  00 00 00 60 00 00 00 10  |.......`...`....|

    00000150  00 00 00 00 00 00 00 10  00 00 00 00 00 00 00 f0  |................|

    00000160  00 00 00 70 00 00 00 60  00 00 00 f0 00 00 00 00  |...p...`........|

    00000170  00 00 00 e0 00 00 00 e0  00 00 00 a0 00 00 00 00  |................|

    00000180  00 00 00 00 00 00 00 e0  00 00 00 00 00 00 00 60  |...............`|

    00000190  00 00 00 70 00 00 00 20  00 00 00 60 00 00 00 60  |...p... ...`...`|

    000001a0  00 00 00 70 00 00 00 00  00 00 00 40 00 00 00 50  |...p.......@...P|

    000001b0  00 00 00 20 00 00 00 70  00 00 00 70 00 00 00 00  |... ...p...p....|

    000001c0  00 00 00 60 00 00 00 40  00 00 00 20 00 00 00 20  |...`...@... ... |

    000001d0  00 00 00 20 00 00 00 70  00 00 00 60 00 00 00 00  |... ...p...`....|

    000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|

    000001f0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 a0  |................|

    00000200

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