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User profile for user: randalltrini
randalltrini Author
User level: Level 1
8 points

Repair Boot Camp Partition

Dear Team,


I have a problem where after restoring my OSX installation to a new drive after crash, my bootcamp is not working. I get an error:


"No bootable device --- insert boot disk and press any key"

It is also not showing up in the OSX boot loader although Startup Disk control panel is seeing it.

My stats are: Macbook pro 13", early 2011, 8G RAM, the new 500G drive is installed in the optical bay via OWC data doubler, while the old original 320G mac drive is in the main hard drive bay.

I first tried to use bootcamp assistant to do a fresh install with the intention to restore an EASEUS backup. However after the drive was prepared and the mac rebooted to install windows, the windows install disc would not boot. I then decided re-installed Win7 to the bootcamp partition by restoring an EASUS backup by taking the drive out of the macbook pro and using a Windows PC to restore. I also tried to convert from a FAT32 file format which disk utility had done under OSX, to NTFS by using the command prompt conversion under Win7. That conversion process resulted in a cyclic redundancy error, even though the BOOTCAMP partition was showing up in disk utility as NTFS after I put back in the drive. By the way I did the NTFS conversion before restoring the backup.

Finally, when I restored the EASEUS backup, the drive got renamed from BOOTCAMP to Untitled even though I specified BOOTCAMP.

I saw in this post as commented by Christopher Murphy, to run:

sudo gpt -r -vv show disk0

sudo fdisk /dev/disk0


The results are as follows:


Randalls-MacBook-Pro:~ randalld$ sudo gpt -r -vv show disk0

gpt show: disk0: mediasize=500107862016; sectorsize=512; blocks=976773168

gpt show: disk0: Suspicious MBR at sector 0

gpt show: disk0: Pri GPT at sector 1

gpt show: disk0: Sec GPT at sector 976773167

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 625484576 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

625894216 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

627163752 13848

627177600 323883008 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

951060608 25712527

976773135 32 Sec GPT table

976773167 1 Sec GPT header



Disk: /dev/disk0 geometry: 60801/255/63 [976773168 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 - 625484576] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 625894216 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 627177600 - 323883008] Win95 FAT32L

Can someone please help?

MacBook Pro (13-inch Early 2011), OS X Mavericks (10.9.4)

Posted on Jul 19, 2014 7:55 AM

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20 replies
User profile for user: Loner T
Loner T
User level: Level 9
59,513 points

Aug 6, 2014 8:30 AM in response to randalltrini

Apologies I missed this thread. 😟

You mention two disks, one a 320G in the original SATA slot and a 500G (OWC Data doubler) in the Optibay.


1. Which disk has Bootcamp?

2. There are known SATA speed issues in the Optibay slot which cause bad behavior.

3. Can you post the output of sudo dd if=/dev/disk0s4 count=1 2>/dev/null | hexdump -C (this will check if your NTFS header is intact or not)?

4. Please post a diskutil list output?

5. You can fix your MBR and try to see if it will let you see the Windows drive or not. Here are the commands.


sudo fdisk -e /dev/disk0

setpid 4

07

flag 4

p

w

y


6. You may need to execute Windows startup repair after 5, if the OSX side switches to Bootcamp, but no operating system is found.

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User profile for user: Loner T
Loner T
User level: Level 9
59,513 points

Aug 6, 2014 7:46 PM in response to igoddie

You have more than one OS on this machine. Can you post a new thread and post the output of commands (the sudo ones) as have been posted?

Please also post the output of diskutil list on the new thread. Please note that coming-in-this-Fall OS is still in test. 😉

If you are using a Fusion drive, please also post diskutil cs list.

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User profile for user: igoddie
igoddie
User level: Level 1
0 points

Aug 7, 2014 2:12 AM in response to Loner T

Panic, switched off my mac, now I it doesn't boot. just flashing a ?, I cant even get it to recovery using the command R. looks like bad to worse situation now. Can I use another mac with the same os10.9 to create a usb recovery and use it to fix mine? what else can I do that can serve my files, had not backed them. Heeeeeeeeeeeeelp

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User profile for user: Rani9933
Rani9933
User level: Level 1
0 points

Aug 11, 2014 9:44 PM in response to Loner T

Hi all,


After reallocating some space to my Windows partition, I realize I'm in a similar boat as many of you. However, my problem is slightly different as I cannot boot into the Mac half, and can only boot into Windows. How do I go about troubleshooting this from the Windows side? I'm only vaguely familiar with batch commands, so please be patient with me 🙂 Thank you.


EDIT: I'm running Windows 7 on a mid-2012 Macbook pro and was running Mavericks on the other half before this fiasco started.

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User profile for user: Loner T
Loner T
User level: Level 9
59,513 points

Aug 12, 2014 2:23 AM in response to Rani9933

If you have come this far, please post a new thread, with the output of


1. diskutil list

2. sudo gpt -vv -r show /dev/diskX, where X corresponds to each disk from 0 and n


These will have to be executed in a Mac OS X Terminal, which can be started using Applications -> Utilities -> Terminal. #2 will ask you for your administrative password. Typically, OS X software installers ask for the same password.

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User profile for user: randalltrini
randalltrini Author
User level: Level 1
8 points

Aug 27, 2014 3:39 AM in response to Loner T

Hey LonerT,


Sorry for taking so long I was out of the country last two weeks and unfortunately my internet connectivity was non-existent.


WIndows is on the 500G in the Optibay side. The 320G had the old OSX and Windows operating systems originally, but I accidentally deleted the Windows partition on the old one, but was able to restore a copy to a new partition on the 500G one.


I keep getting no response with the: "sudo dd if=/dev/disk0s4 count=1 2>/dev/null | hexdump -C". Do I need to change the disk reference for my drive? Or does it create a file output on the drive?


The output for "diskutil list" is:


/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS MacHD2 320.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 165.8 GB disk0s4

/dev/disk1

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *320.1 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_HFS Macintosh HD 319.2 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3

/dev/disk2

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *128.7 GB disk2

1: Windows_NTFS StorEDGE 128.7 GB disk2s1

/dev/disk3

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *153.6 MB disk3

1: Apple_HFS Leap Motion 153.6 MB disk3s1


Should I go ahead and try the actions in step 5?


RD

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User profile for user: Loner T
Loner T
User level: Level 9
59,513 points

Aug 27, 2014 4:33 AM in response to randalltrini

If you update the MBR, it will mark it bootable, but the underlying OS issue still may need a Windows Recovery/Startup Repair.


The command just dumps the file header information to see if there are any signs of NTFS corruption. Use this command (the raw disk rather than the block disk needs to be used).


"sudo dd if=/dev/disk0s4 count=1 2>/dev/null | hexdump -C"


should be


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

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User profile for user: randalltrini
randalltrini Author
User level: Level 1
8 points

Aug 27, 2014 7:55 AM in response to Loner T

Loner T,


Got this from Sudo cmd:


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 80 f8 61 25 |........?.....a%|

00000020 00 00 00 00 80 00 80 00 f7 0f 4e 13 00 00 00 00 |..........N.....|

00000030 00 00 0c 00 00 00 00 00 ff ff 73 00 00 00 00 00 |..........s.....|

00000040 f6 00 00 00 01 00 00 00 30 18 37 6a 15 a3 cf 01 |........0.7j....|

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


Am I to judge that the BootMgr is missing (as per the text on the side). If so can it be recreated?


RD

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Repair Boot Camp Partition

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