cooliopatra
Level 1 (5 points)
Windows Software

Q: repairing bootcamp after partition

hi, my bootcamp won't start.

I can see the bootcamp files on finder and also see the bootcamp system on startup disk in system preference of my OS but when ever I choose to restart my computer using window it just says no bootable device found and goes all black.

I recently updated my os to el capitan and deleted unused partition that was taking up space.

I don't know much about computers so if you could help me I will be so grateful!!!! 

 

/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_HFS Macintosh HD            75.9 GB    disk0s2

   3:                 Apple_Boot Recovery HD             5.1 GB     disk0s3

   4:       Microsoft Basic Data BOOTCAMP                40.0 GB    disk0s4

/dev/disk1 (external, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:     FDisk_partition_scheme                        *500.1 GB   disk1

   1:                 DOS_FAT_32 HANNA                   500.1 GB   disk1s1

 

diskutil cs list

No CoreStorage logical volume groups found

sudo gpt -vv -r show /dev/disk0

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

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 236978175

      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  148163312      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

  148572952   10020072      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

  158593024     262144        

  158855168   78120960      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

  236976128       2015        

  236978143         32         Sec GPT table

  236978175          1         Sec GPT header

MacBook Air (13-inch Mid 2012), OS X El Capitan (10.11.4)

Posted on Apr 21, 2016 8:15 PM

by Loner T,Solvedanswer
Loner T Loner T
Level 7 (23,828 points)
Safari
A:

You have two separate issues.

 

1. Your Recovery HD is the incorrect size. It is usually 620 MB, but it is now 5.1Gb.

2. Your MBR entry #4 is incorrect. Let us try to fix this first before we solve the other issue.

 

A. We need to disable SIP (System Integrity Protection).

 

1. Boot into Local Recovery (Command+R).

2. Start Utilities -> Terminal.

3. Type csrutil disable in Terminal and press Enter/Return.

4. Type csrutil status.

5. Boot normally, and type csrutil status to confirm that all individual entries are still disabled.

 

B. Correct the MBR. Please ignore the i386 MBR errors, but not any others.

 

sudo fdisk -e /dev/disk0

p

setpid 4

07

flag 4

p

w

y

 

Reboot and Test. If It works repeat step A with csrutil enable to re-enable SIP.

Posted on Apr 21, 2016 10:02 PM

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cooliopatra

Q: repairing bootcamp after partition

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  • by cooliopatra,

    cooliopatra cooliopatra Apr 27, 2016 6:51 PM in response to Loner T
    Level 1 (5 points)
    Windows Software
    Apr 27, 2016 6:51 PM in response to Loner T

    Hi, I need your help again!

    I deleted my bootcamp because the partition was too tight for windows,  thinking that I could just reinstall my windows 7 again but for some reason my bootcamp assistant program would not go through installation of the windows.

     

    partitioning and creating of ISO image to USB  stick works fine but once its done with partitioning it restarts and goes black saying no bootable device found.

    what could it be this time??? 

  • by vikasfromkolkata,

    vikasfromkolkata vikasfromkolkata Jul 19, 2016 6:25 AM in response to cooliopatra
    Level 1 (14 points)
    Windows Software
    Jul 19, 2016 6:25 AM in response to cooliopatra

    Vikass-MacBook-Pro:~ vikasagarwal$ diskutil list

    /dev/disk0 (internal, physical):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:      GUID_partition_scheme                        *320.1 GB   disk0

       1:                        EFI EFI                     209.7 MB   disk0s1

       2:          Apple_CoreStorage Macintosh HD            245.3 GB   disk0s2

       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3

       4:                  Apple_HFS VA                      38.8 GB    disk0s4

       5:       Microsoft Basic Data BOOTCAMP                35.0 GB    disk0s5

    /dev/disk1 (internal, virtual):

       #:                       TYPE NAME                    SIZE       IDENTIFIER

       0:                  Apple_HFS Macintosh HD           +245.0 GB   disk1

                                     Logical Volume on disk0s2

                                     6D491581-B7A8-4B09-A171-5344C897E32B

                                     Unlocked Encrypted

    Vikass-MacBook-Pro:~ vikasagarwal$ sudo fdisk /dev/disk0

    Password:

    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 -  625142447] <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     

    Vikass-MacBook-Pro:~ vikasagarwal$ sudo gdisk /dev/disk0

     

    Vikass-MacBook-Pro:~ vikasagarwal$ sudo gpt -v -r show /dev/disk0

    gpt show: /dev/disk0: mediasize=320072933376; sectorsize=512; blocks=625142448

          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  479143480      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

      479553120    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

      480822656   75698816      4  GPT part - 48465300-0000-11AA-AA11-00306543ECAC

      556521472     262144        

      556783616   68358144      5  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

      625141760        655        

      625142415         32         Sec GPT table

      625142447          1         Sec GPT header

  • by vikasfromkolkata,

    vikasfromkolkata vikasfromkolkata Jul 19, 2016 6:33 AM in response to vikasfromkolkata
    Level 1 (14 points)
    Windows Software
    Jul 19, 2016 6:33 AM in response to vikasfromkolkata

    Hi! I had formatted my macOS partition from disk utilities and reloaded OS Captain. After that,  I am unable to boot using bootcamp. I can see bootcamp in finder and also in system preferences "startup". But it is not visible when i start computer pressing option. In anywise I am unable to boot using bootcamp.

     

    Please help me restore my bootcamp

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