Repairing Bootcamp after creating a new partition

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Repairing Bootcamp after creating a new partition

I made the similar mistake than in the similarly titled thread :Repairing Boot Camp after creating new partition

I created a new partition using disk utilities, rendering my bootcamp unbootable. I see Bootcamp in the boot menu in OS X. But when I try to reboot it fails.

Following guidelines from previous threads, here are my infos: (Build: OS X 10.8.5 (12F2560))

Please start a new thread and post a reference here and the output of the following commands.

1. diskutil list

caor-pcfixe-4183:~ Baltifru$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            100.0 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:       Microsoft Basic Data BOOTCAMP                375.3 GB   disk0s4

2. diskutil cs list

caor-pcfixe-4183:~ Baltifru$ diskutil cs list
No CoreStorage logical volume groups found

3. sudo gpt -vv -r show /dev/disk0 (if bootcamp is on disk0, or choose the appropriate disk, as shown in diskutil list).

caor-pcfixe-4183:~ Baltifru$ sudo gpt -r -vv show disk0
Password:
gpt show: disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168
gpt show: disk0: Suspicious MBR at sector 0
gpt show: disk0: Pri GPT at sector 1
gpt show: 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   195312496      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
   195722136     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
   196991672   535158088         
   732149760   732997632      4  GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
  1465147392        1743         
  1465149135          32         Sec GPT table
  1465149167           1         Sec GPT header

4. sudo fdisk /dev/disk0 (if bootcamp is on disk0, or choose the appropriate disk, as shown in diskutil list).

caor-pcfixe-4183:~ Baltifru$ sudo fdisk /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 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>
 2: AF 1023 254  63 - 1023 254  63 [    409640 -  195312496] HFS+        
 3: AB 1023 254  63 - 1023 254  63 [ 195722136 -    1269536] Darwin Boot 
 4: 0C 1023 254  63 - 1023 254  63 [ 732149760 -  732997632] Win95 FAT32L

5. sudo dd if=/dev/rdisk0 count=1 2>/dev/null | hexdump -C (if bootcamp is on disk0, or choose the appropriate disk, as shown in diskutil list).

caor-pcfixe-4183:~ Baltifru$ sudo dd if=/dev/rdisk0 count=1 2>/dev/null | hexdump -C
00000000  33 c0 8e d0 bc 00 7c 8e  c0 8e d8 be 00 7c bf 00  |3.....|......|..|
00000010  06 b9 00 02 fc f3 a4 50  68 1c 06 cb fb b9 04 00  |.......Ph.......|
00000020  bd be 07 80 7e 00 00 7c  0b 0f 85 0e 01 83 c5 10  |....~..|........|
00000030  e2 f1 cd 18 88 56 00 55  c6 46 11 05 c6 46 10 00  |.....V.U.F...F..|
00000040  b4 41 bb aa 55 cd 13 5d  72 0f 81 fb 55 aa 75 09  |.A..U..]r...U.u.|
00000050  f7 c1 01 00 74 03 fe 46  10 66 60 80 7e 10 00 74  |....t..F.f`.~..t|
00000060  26 66 68 00 00 00 00 66  ff 76 08 68 00 00 68 00  |&fh....f.v.h..h.|
00000070  7c 68 01 00 68 10 00 b4  42 8a 56 00 8b f4 cd 13  ||h..h...B.V.....|
00000080  9f 83 c4 10 9e eb 14 b8  01 02 bb 00 7c 8a 56 00  |............|.V.|
00000090  8a 76 01 8a 4e 02 8a 6e  03 cd 13 66 61 73 1c fe  |.v..N..n...fas..|
000000a0  4e 11 75 0c 80 7e 00 80  0f 84 8a 00 b2 80 eb 84  |N.u..~..........|
000000b0  55 32 e4 8a 56 00 cd 13  5d eb 9e 81 3e fe 7d 55  |U2..V...]...>.}U|
000000c0  aa 75 6e ff 76 00 e8 8d  00 75 17 fa b0 d1 e6 64  |.un.v....u.....d|
000000d0  e8 83 00 b0 df e6 60 e8  7c 00 b0 ff e6 64 e8 75  |......`.|....d.u|
000000e0  00 fb b8 00 bb cd 1a 66  23 c0 75 3b 66 81 fb 54  |.......f#.u;f..T|
000000f0  43 50 41 75 32 81 f9 02  01 72 2c 66 68 07 bb 00  |CPAu2....r,fh...|
00000100  00 66 68 00 02 00 00 66  68 08 00 00 00 66 53 66  |.fh....fh....fSf|
00000110  53 66 55 66 68 00 00 00  00 66 68 00 7c 00 00 66  |SfUfh....fh.|..f|
00000120  61 68 00 00 07 cd 1a 5a  32 f6 ea 00 7c 00 00 cd  |ah.....Z2...|...|
00000130  18 a0 b7 07 eb 08 a0 b6  07 eb 03 a0 b5 07 32 e4  |..............2.|
00000140  05 00 07 8b f0 ac 3c 00  74 09 bb 07 00 b4 0e cd  |......<.t.......|
00000150  10 eb f2 f4 eb fd 2b c9  e4 64 eb 00 24 02 e0 f8  |......+..d..$...|
00000160  24 02 c3 49 6e 76 61 6c  69 64 20 70 61 72 74 69  |$..Invalid parti|
00000170  74 69 6f 6e 20 74 61 62  6c 65 00 45 72 72 6f 72  |tion table.Error|
00000180  20 6c 6f 61 64 69 6e 67  20 6f 70 65 72 61 74 69  | loading operati|
00000190  6e 67 20 73 79 73 74 65  6d 00 4d 69 73 73 69 6e  |ng system.Missin|
000001a0  67 20 6f 70 65 72 61 74  69 6e 67 20 73 79 73 74  |g operating syst|
000001b0  65 6d 00 00 00 63 7b 9a  8e 54 00 00 00 00 00 fe  |em...c{..T......|
000001c0  ff ff ee fe ff ff 01 00  00 00 27 40 06 00 00 fe  |..........'@....|
000001d0  ff ff af fe ff ff 28 40  06 00 70 3b a4 0b 00 fe  |......(@..p;....|
000001e0  ff ff ab fe ff ff 98 7b  aa 0b 20 5f 13 00 00 fe  |.......{.. _....|
000001f0  ff ff 0c fe ff ff 00 b8  a3 2b 00 a8 b0 2b 55 aa  |.........+...+U.|
00000200

I'm vaguely familiar with the process considering the posts I read but not confident and skilled enough to do it by myself.

Could someone help me please ?

MacBook Pro, OS X Mountain Lion (10.8.5)

Posted on Sep 28, 2015 10:10 AM

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Answer 1

Loner T

Level 9

59,513 points

Sep 28, 2015 10:22 AM in response to Anthistle

The gap between GPT3 and GPT4 indicates a lost NTFS header. Can you use Bootcamp fails after Yosemite upgrade (Plz help me Loner!) as a reference and download Testdisk and GPT Fdisk? Once you have Testdisk downloaded, run it and use /dev/rdisk0 and execute a Quick Search.

Please also post the out of the following command (notice that it is different from what you posted earlier).

sudo dd if=/dev/rdisk04 count=1 2>/dev/null | hexdump -C

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Answer 2

Anthistle Author

Level 1

0 points

Sep 28, 2015 10:57 AM in response to Loner T

Thank you for your quick reply. (I have a problem with some characters/words that are not possible to write here apparently)

the command with 04 doesn't return anything

I downloaded Testdisk and GPT

Result of the Analysis

Disk /dev/rdisk0 - 750 GB / 698 GiB - 1465149168 sectors (RO)
Current partition structure:
     Partition                  Start        End    Size in sectors
 1 P EFI System                    40     409639     409600 [EFI system partitio
2 P Mac HFS                   409640  195722135  195312496 [Customer]
3 P Mac Boot               195722136  196991671    1269536 [Recovery HD]
Warning: number of heads/cylinder mismatches 255 (NTFS) != 1 (HD)
Warning: number of sectors per track mismatches 63 (NTFS) != 1 (HD)

For some reason I fail to paste the last line. (the numbers)

4 P MS DATA 732149760   []

I'm not sure how you calculate the numbers for steps 7 8

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Answer 3

Loner T

Level 9

59,513 points

Sep 28, 2015 11:04 AM in response to Anthistle

Let us try again.

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

You are not a point to calculate the values in steps 7 and 8. You will need to run a Quick Search. Please see http://imgur.com/a/PjmnK for starting screens.

You need to get to http://imgur.com/lM9JKAu first.

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Answer 4

Anthistle Author

Level 1

0 points

Sep 28, 2015 11:01 AM in response to Loner T

with 0s4 it works fine.

caor-pcfixe-4183:~ Baltifru$ sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C
00000000  eb 52 90 4e 54 46 53 20  20 20 20 00 02 08 00 00  |.R.NTFS    .....|
00000010  00 00 00 00 00 f8 00 00  3f 00 ff 00 00 b8 a3 2b  |........?......+|
00000020  00 00 00 00 80 00 80 00  ff a7 b0 2b 00 00 00 00  |...........+....|
00000030  00 00 0c 00 00 00 00 00  02 00 00 00 00 00 00 00  |................|
00000040  f6 00 00 00 01 00 00 00  82 31 9d 5e 46 9d 5e 04  |.........1.^F.^.|
00000050  00 00 00 00 fa 33 c0 8e  d0 bc 00 7c fb 68 c0 07  |.....3.....|.h..|
00000060  1f 1e 68 66 00 cb 88 16  0e 00 66 81 3e 03 00 4e  |..hf......f.>..N|
00000070  54 46 53 75 15 b4 41 bb  aa 55 cd 13 72 0c 81 fb  |TFSu..A..U..r...|
00000080  55 aa 75 06 f7 c1 01 00  75 03 e9 dd 00 1e 83 ec  |U.u.....u.......|
00000090  18 68 1a 00 b4 48 8a 16  0e 00 8b f4 16 1f cd 13  |.h...H..........|
000000a0  9f 83 c4 18 9e 58 1f 72  e1 3b 06 0b 00 75 db a3  |.....X.r.;...u..|
000000b0  0f 00 c1 2e 0f 00 04 1e  5a 33 db b9 00 20 2b c8  |........Z3... +.|
000000c0  66 ff 06 11 00 03 16 0f  00 8e c2 ff 06 16 00 e8  |f...............|
000000d0  4b 00 2b c8 77 ef b8 00  bb cd 1a 66 23 c0 75 2d  |K.+.w......f#.u-|
000000e0  66 81 fb 54 43 50 41 75  24 81 f9 02 01 72 1e 16  |f..TCPAu$....r..|
000000f0  68 07 bb 16 68 70 0e 16  68 09 00 66 53 66 53 66  |h...hp..h..fSfSf|
00000100  55 16 16 16 68 b8 01 66  61 0e 07 cd 1a 33 c0 bf  |U...h..fa....3..|
00000110  28 10 b9 d8 0f fc f3 aa  e9 5f 01 90 90 66 60 1e  |(........_...f`.|
00000120  06 66 a1 11 00 66 03 06  1c 00 1e 66 68 00 00 00  |.f...f.....fh...|
00000130  00 66 50 06 53 68 01 00  68 10 00 b4 42 8a 16 0e  |.fP.Sh..h...B...|
00000140  00 16 1f 8b f4 cd 13 66  59 5b 5a 66 59 66 59 1f  |.......fY[ZfYfY.|
00000150  0f 82 16 00 66 ff 06 11  00 03 16 0f 00 8e c2 ff  |....f...........|
00000160  0e 16 00 75 bc 07 1f 66  61 c3 a0 f8 01 e8 09 00  |...u...fa.......|
00000170  a0 fb 01 e8 03 00 f4 eb  fd b4 01 8b f0 ac 3c 00  |..............<.|
00000180  74 09 b4 0e bb 07 00 cd  10 eb f2 c3 0d 0a 41 20  |t.............A |
00000190  64 69 73 6b 20 72 65 61  64 20 65 72 72 6f 72 20  |disk read error |
000001a0  6f 63 63 75 72 72 65 64  00 0d 0a 42 4f 4f 54 4d  |occurred...BOOTM|
000001b0  47 52 20 69 73 20 6d 69  73 73 69 6e 67 00 0d 0a  |GR is missing...|
000001c0  42 4f 4f 54 4d 47 52 20  69 73 20 63 6f 6d 70 72  |BOOTMGR is compr|
000001d0  65 73 73 65 64 00 0d 0a  50 72 65 73 73 20 43 74  |essed...Press Ct|
000001e0  72 6c 2b 41 6c 74 2b 44  65 6c 20 74 6f 20 72 65  |rl+Alt+Del to re|
000001f0  73 74 61 72 74 0d 0a 00  8c a9 be d6 00 00 55 aa  |start.........U.|
00000200

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Answer 5

Loner T

Level 9

59,513 points

Sep 28, 2015 11:05 AM in response to Anthistle

We can make this bootable, but let us verify via Testdisk that this is the correct one.

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Answer 6

Anthistle Author

Level 1

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Sep 28, 2015 11:13 AM in response to Loner T

This is what testdisk gives me. (as an image, because I can't post it otherwise)

And then :

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Answer 7

Loner T

Level 9

59,513 points

Sep 28, 2015 11:23 AM in response to Anthistle

This is a list of unrecoverable partitions. Press Enter to Continue and you should see a list of viable partitions.

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Answer 8

Anthistle Author

Level 1

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Sep 28, 2015 1:21 PM in response to Loner T

This is the next screen:

And then :

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Answer 9

Loner T

Level 9

59,513 points

Sep 28, 2015 1:27 PM in response to Anthistle

Scroll down to entry 4. There should be a menu at the bottom of the screen with 'P' to list files. If this is the correct one, then your partition table will be

We are looking for something similar to the following.

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Answer 10

Anthistle Author

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Sep 28, 2015 1:35 PM in response to Loner T

There is indeed something similar :

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Answer 11

Loner T

Level 9

59,513 points

Sep 28, 2015 1:59 PM in response to Anthistle

This looks correct, but you will lose about 260+ GB in the gap between Recovery HD and Bootcamp. There is a way to get it back, but let us tackle this first.

In the first set of Gdisk steps in the linked discussion, the value in step 7 is

732149760

and the size in Step 8 is

732997632

Use these and rebuild your GPT (first set of Gdisk steps) and the MBR (second set of Gdisk steps) and test Windows boot first.

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Answer 12

Anthistle Author

Level 1

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Oct 1, 2015 8:23 AM in response to Loner T

It indeed worked as expected. My bootcamp boot normally. thank you ! You pretty much saved a year worth of work.

As for the 260 GB. There was nothing on it. I was trying to partition to potentially add an Ubuntu, but didn't do anything when I saw that I could not boot on windows anymore. There should be no loss in itself. The only question is, if it's possible to reaccess this space (for OS X, or ot install Ubuntu)

Thank you so much again !

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Answer 13

Loner T

Level 9

59,513 points

Oct 1, 2015 8:31 AM in response to Anthistle

Can you post the current output of

diskutil list

sudo gpt -vv -r show /dev/disk0

We can use a couple of Terminal commands and get your disk space back.

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Answer 14

Anthistle Author

Level 1

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Oct 1, 2015 8:33 AM in response to Loner T

This is what I get :

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Answer 15

Loner T

Level 9

59,513 points

Oct 1, 2015 8:42 AM in response to Anthistle

You will temporarily lose access to Recovery HD and will need to re-install OSX to get it back.

1. Backup OSX and Windows.

2. Merge OSX and Recovery HD. The order of the disk slices is critical.

diskutil mergePartitions jhfs+ "Macintosh HD" disk0s2 disk0s3

3. Run Disk Utility and drag the bottom right corner as far as it will go and touch the BC/Windows partition.

4. Boot into Internet Recovery (Command+Opt+R) and re-install OSX - OS X: About OS X Recovery - Apple Support . This will rebuild Recovery HD.

Please be aware of the following

Which version of OS X is installed by OS X Recovery?

If you use the Recovery System stored on your startup drive to reinstall OS X, it installs the most recent version of OS X previously installed on this computer.
If you use Internet Recovery to reinstall OS X, it installs the version of OS X that originally came with your computer. After installation is finished, use the Mac App Store to install related updates or later versions of OS X that you have previously purchased.

5. You can recreate the MBR using the same Gdisk steps, if necessary.

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