Sanjaya83

Q: Can't boot into windows after resizing partitions

I tried to resize my bootcamp and mac partitions recently

I cannot boot into windows now

Get an error about missing MBR

Do you think you could help me here?

I read about using GPT fdisk on another thread

These are the results I got from it

Wanted to check before doing anything

 

Sanjayas-MacBook-Pro:~ sanjaya83$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 38913/255/63 [625142448 sectors]

Signature: 0xAA55

         Starting       Ending

#: id  cyl  hd sec -  cyl  hd sec [     start -       size]

------------------------------------------------------------------------

1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>

2: AF 1023 254  63 - 1023 254  63 [    409640 -  349609376] HFS+      

3: AB 1023 254  63 - 1023 254  63 [ 350019016 -    1269536] Darwin Boot

4: 0C 1023 254  63 - 1023 254  63 [ 351289344 -  273852416] Win95 FAT32L

Sanjayas-MacBook-Pro:~ sanjaya83$ sudo gdisk /dev/disk0

GPT fdisk (gdisk) version 1.0.1

 

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

NOTE: Write test failed with error number 1. It will be impossible to save

changes to this disk's partition table!

You may need to deactivate System Integrity Protection to use this program. See

https://www.quora.com/How-do-I-turn-off-the-rootless-in-OS-X-El-Capitan-10-11

for more information.

 

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/disk0: 625142448 sectors, 298.1 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): 55739070-E42E-4414-947D-F1AAD2EB65D0

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 625142414

Partitions will be aligned on 8-sector boundaries

Total free space is 1453 sectors (726.5 KiB)

 

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

   1              40          409639   200.0 MiB   EF00  EFI System Partition

   2          409640       350019015   166.7 GiB   AF00  Customer

   3       350019016       351288551   619.9 MiB   AB00  Recovery HD

   4       351289344       625141759   130.6 GiB   0700  BOOTCAMP

 

Command (? for help):

MacBook Pro (13-inch Early 2011), OS X El Capitan (10.11.1)

Posted on Dec 1, 2015 5:12 PM

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Q: Can't boot into windows after resizing partitions

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  • by Loner T,

    Loner T Loner T Feb 4, 2016 10:28 AM in response to sakman74
    Level 7 (24,317 points)
    Safari
    Feb 4, 2016 10:28 AM in response to sakman74

    Let us get you working without issues, before we call this done.

  • by sakman74,

    sakman74 sakman74 Feb 4, 2016 10:32 AM in response to Loner T
    Level 3 (748 points)
    Mac OS X
    Feb 4, 2016 10:32 AM in response to Loner T

    regardless, thanks for helping.

  • by sakman74,

    sakman74 sakman74 Feb 5, 2016 6:29 PM in response to Loner T
    Level 3 (748 points)
    Mac OS X
    Feb 5, 2016 6:29 PM in response to Loner T

    exit code 8 is back ..... unfortunately.

     

    so I will reinstall OS 10, however i'd like some advice on how i should go about it without impacting my windows installation or my dual boot status ?

     

    use recovery ? if someone can give me some details on what to expect or what to look out for that would be great. i've never done a reinstall of OS 10 before.

  • by Loner T,

    Loner T Loner T Feb 5, 2016 6:40 PM in response to sakman74
    Level 7 (24,317 points)
    Safari
    Feb 5, 2016 6:40 PM in response to sakman74

    I suggest you back up

     

    1. OSX

    2. Windows

    3. your GPT using Gdisk before you re-install OS X.


    During the restore, do not change any partition sizes.


    Please also see Use Time Machine to back up or restore your Mac - Apple Support .

  • by sakman74,

    sakman74 sakman74 Feb 5, 2016 10:48 PM in response to Loner T
    Level 3 (748 points)
    Mac OS X
    Feb 5, 2016 10:48 PM in response to Loner T

    ok, just got done with the reinstall and all my files/apps and settings were intact after the reinstall.

     

    i didn't see where i could choose to do a clean install, maybe i missed it. but maybe this reinstall that was done might have fixed any corrupted kext or other OS files .... i will periodically check diskutil to see if exit code 8 comes back.

     

    i checked the GPT and everything appears to be exactly the way it was before, no errors or mismatches.

     

    so everything seems fine in OS 10, i will reboot several times into windows to check that also.

  • by Loner T,

    Loner T Loner T Feb 6, 2016 4:45 AM in response to sakman74
    Level 7 (24,317 points)
    Safari
    Feb 6, 2016 4:45 AM in response to sakman74

    Excellent. Please ensure you have a regular back up cycle for both your OSes, and create a Windows System Restore point before any Windows Update.

  • by illuminous,

    illuminous illuminous Feb 6, 2016 5:04 AM in response to Sanjaya83
    Level 1 (10 points)
    Feb 6, 2016 5:04 AM in response to Sanjaya83

    Hi,

     

    Hopefully someone can help with with an issue I am having.

     

    I found an old Apple discussion on how to resize a bootcamp partition, by reducing the size of the OS X partition and then using a Windows based tool to then expand the Bootcamp partition. Big mistake! I ended up with the same problem as this thread's creator, with my Windows partition no longer being bootable.

     

    I followed the steps outlined by Loner T, which worked perfectly! Thanks so much!

     

    I then went into Windows and used the Mini Partition Tool to extend the Windows partition into the unallocated partition which worked fine in Windows.

     

    However when I boot back into OS X and open disk utility I can now see 3 separate partitions.. 1) Mac HD; 2) Untitled (the one I created) 3) Windows HD (Bootcamp). So OS X is not recognising that I have extended the Windows HD partition into the Untitled one.

     

    Is there a way to fix this without ruining the now expanded Windows partition? Windows doesn't seem to see two separate partitions, only in OS X.

     

    Thanks in advance!

  • by Loner T,

    Loner T Loner T Feb 6, 2016 5:21 AM in response to illuminous
    Level 7 (24,317 points)
    Safari
    Feb 6, 2016 5:21 AM in response to illuminous

    Do not use any tool to manipulate partitions further, other you will lose information and files. Please post the output of the following OS X Terminal commands.

     

    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 sakman74,

    sakman74 sakman74 Feb 6, 2016 5:42 AM in response to Loner T
    Level 3 (748 points)
    Mac OS X
    Feb 6, 2016 5:42 AM in response to Loner T

    i'm not familiar with how Time Machine actually works and what it backs-up. is it similar to Windows restore ?

     

    I like using clonezilla because it's incredibly easy and painless to save and restore entire disk images. only downside for me to using clonezilla is that i have to attach my optical drive to run it from CD while i have connected a USB hdd to save the image onto. it's just cumbersome to do that, so I don't do it often. I need to figure out how to run clonezilla from a flash drive.

     

    but it has saved my machines in the past and saved me from the headache of reinstalls and setups that sometimes took hours ...

  • by sakman74,

    sakman74 sakman74 Feb 6, 2016 5:55 AM in response to sakman74
    Level 3 (748 points)
    Mac OS X
    Feb 6, 2016 5:55 AM in response to sakman74

    bad news .... AGAIN.

     

    file exit code 8 reappeared. this just happened after i boot into Windows 10, checked my email and used my browser, then rebooted back into OS 10.

     

    what might be causing this ? I also have paragon HFS+ driver for Windows, which I use to read/write to the HFS+ partition. The reason why I have this is because I use firefox and thunderbird, and I have my profiles stored on the Macintosh HD partition. I have my windows firefox and thunderbird set to read directly from the profiles on the Macintosh HD partition ....

     

    I suppose that I can put my profiles on my NAS drive .... in my experience i had lagging and slow performance in mozilla apps when i loaded them from the NAS. but i was able to use the same profile from windows or mac os.

     

    Loner T do you think this might be causing this issue ?

  • by illuminous,

    illuminous illuminous Feb 6, 2016 6:04 AM in response to Loner T
    Level 1 (10 points)
    Feb 6, 2016 6:04 AM in response to Loner T

    Yes, trust me I've learnt my lessons on messing with partitions!! here are outputs.. included disk0 and disk1


    diskutil list

    /dev/disk0 (internal, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *121.3 GB   disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:          Apple_CoreStorage Macintosh HD            121.0 GB   disk0s2

       3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3

    /dev/disk1 (internal, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *1.0 TB     disk1

       1:                        EFI EFI                     209.7 MB   disk1s1

       2:          Apple_CoreStorage Macintosh HD            637.5 GB   disk1s2

       3:                 Apple_Boot Recovery HD             650.1 MB   disk1s3

       4:                  Apple_HFS                         173.7 GB   disk1s4

       5:       Microsoft Basic Data Windows HD              188.0 GB   disk1s5

    /dev/disk2 (internal, virtual):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           +750.0 GB   disk2

                                     Logical Volume on disk0s2, disk1s2

                                     D3F5913D-0A32-4BE8-BD44-A65885746DA0

                                     Unencrypted Fusion Drive

    /dev/disk3 (external, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *1.5 TB     disk3

       1:                        EFI EFI                     209.7 MB   disk3s1

       2:                  Apple_HFS My Book Studio A        1.5 TB     disk3s2

    /dev/disk4 (external, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *1.5 TB     disk4

       1:                        EFI EFI                     209.7 MB   disk4s1

       2:                  Apple_HFS My Book Studio B        1.5 TB     disk4s2

     

    diskutil cs list

    CoreStorage logical volume groups (1 found)

    |

    +-- Logical Volume Group 23846179-0CBE-42F5-A375-0D969F4C789E

        =========================================================

        Name:         Macintosh HD

        Status:       Online

        Size:         758507479040 B (758.5 GB)

        Free Space:   229376 B (229.4 KB)

        |

        +-< Physical Volume 571468F3-1F01-43FF-95B5-96F0B1CA90A2

        |   ----------------------------------------------------

        |   Index:    0

        |   Disk:     disk0s2

        |   Status:   Online

        |   Size:     120988852224 B (121.0 GB)

        |

        +-< Physical Volume 6221D4DD-339F-4497-87C4-2522407182AF

        |   ----------------------------------------------------

        |   Index:    1

        |   Disk:     disk1s2

        |   Status:   Online

        |   Size:     637518626816 B (637.5 GB)

        |

        +-> Logical Volume Family 41CF6816-F84F-4D76-A6FD-97288E448BF7

            ----------------------------------------------------------

            Encryption Type:         None

            |

            +-> Logical Volume D3F5913D-0A32-4BE8-BD44-A65885746DA0

                ---------------------------------------------------

                Disk:                  disk2

                Status:                Online

                Size (Total):          749999882240 B (750.0 GB)

                Revertible:            No

                LV Name:               Macintosh HD

                Volume Name:           Macintosh HD

                Content Hint:          Apple_HFS

                LVG Type:              Fusion, Sparse

     

    sudo gpt -vv -r show /dev/disk0

    gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176

    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 236978175

          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  236306352      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      236715992     262144      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      236978136          7        

      236978143         32         Sec GPT table

      236978175          1         Sec GPT header

     

    sudo gpt -vv -r show /dev/disk1

    gpt show: /dev/disk1: mediasize=1000204886016; sectorsize=512; blocks=1953525168

    gpt show: /dev/disk1: Suspicious MBR at sector 0

    gpt show: /dev/disk1: Pri GPT at sector 1

    gpt show: error: bogus map

    gpt show: unable to open device '/dev/disk1': Undefined error: 0

     

    sudo fdisk /dev/disk0

    Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]

    Signature: 0xAA55

             Starting       Ending

    #: id  cyl  hd sec -  cyl  hd sec [     start -       size]

    ------------------------------------------------------------------------

    1: EE 1023 254  63 - 1023 254  63 [         1 -  236978175] <Unknown ID>

    2: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

    3: 00    0   0   0 -    0   0   0 [         0 -          0] unused     

    4: 00    0   0   0 -    0   0   0 [         0 -          0] unused

     

    sudo fdisk /dev/disk1

    Disk: /dev/disk1 geometry: 121601/255/63 [1953525168 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 - 1245153568] HFS+       

    3: AB 1023 254  63 - 1023 254  63 [1245563208 -    1269760] Darwin Boot

    *4: 07 1023 254  63 - 1023 254  63 [1246834688 -  706689024] HPFS/QNX/AUX

  • by Loner T,

    Loner T Loner T Feb 6, 2016 6:39 AM in response to illuminous
    Level 7 (24,317 points)
    Safari
    Feb 6, 2016 6:39 AM in response to illuminous

    To avoid confusion, can you start a new discussion and post these outputs? It helps in asking for input and providing feedback.

     

    Please download GPT Fdisk - http://sourceforge.net/projects/gptfdisk/. You seem to have GPT CRC corruption.

  • by Loner T,

    Loner T Loner T Feb 6, 2016 6:42 AM in response to sakman74
    Level 7 (24,317 points)
    Safari
    Feb 6, 2016 6:42 AM in response to sakman74

    It possibly can. It may be difficult to identify if it has already happened.

     

    Can I suggest creating a USB Flash drive/SD Card with a FAT32 file system and using it for you Profiles? I have seen minor to major issues with third-party file system drivers which do not close open files, directories or devices and cause havoc with inodes and directories.

  • by sakman74,

    sakman74 sakman74 Feb 6, 2016 7:04 AM in response to Loner T
    Level 3 (748 points)
    Mac OS X
    Feb 6, 2016 7:04 AM in response to Loner T

    im going to try to keep away from using firefox and thunderbird in windows for a few days to see if the issue disappears. if so, that could be a cause ...

     

    perhaps a FAT32 or extFAT partition added to my computer in order to share data without corruption might work ? i dont know if these fs's will work seamlessly with both OS's ? if it is possible i need to figure out how to (1) shrink my windows partition by a few GB and (2) add the partition sucessfully ...

  • by Loner T,

    Loner T Loner T Feb 6, 2016 7:15 AM in response to sakman74
    Level 7 (24,317 points)
    Safari
    Feb 6, 2016 7:15 AM in response to sakman74

    First try with an external device, before you start repartitioning. It is problematic to repartition drives which also have BC/Windows.

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