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Boot Camp doesn't work after having created a new partition in OS X

Hello,


I'm running OS X 10.8.5 and Windows 7 x64 Pro.

After properly setting up Boot Camp to dual-boot Windows on my MacBook Pro,


I opened Disk Utility, reduced the size of my OS X parition from 370GB to 270GB, and created a new partition (called "D", in Windows NT (NTFS) format) in the unallocated space. Here's how it looks now:

User uploaded file

Whilst OS X boots just fine, the Boot Camp partition now no longer shows up in the Startup Manager, though it does in the Startup Disk prefPane. If I do attempt to boot into Boot Camp, I receive the following message on a black screen:

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


Reading this post, I have try to do what Christopher Murphy said, but my messages at the command line where different:


Results of the "sudo gpt -r -vv show disk0" command:


URI-PC:~ URI$ sudo gpt -r -vv show disk0

Password:

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 538627992 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

539037632 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

540307168 288

540307456 198184960 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

738492416 238280704 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976773120 15

976773135 32 Sec GPT table

976773167 1 Sec GPT header


Results of the "sudo fdisk /dev/disk0" command:


URI-PC:~ URI$ sudo fdisk /dev/disk0

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 - 538627992] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 539037632 - 1269536] Darwin Boot

4: 07 1023 254 63 - 1023 254 63 [ 540307456 - 198184960] HPFS/QNX/AUX



Christopher Murphy, Must I do the same as you said to Scotch_Brawth

Mayby if I delete disc D with Disk Utility and resize the mac one, boot camp works again.



Thank you very much

MacBook Pro (15-inch Mid 2012), OS X Mountain Lion (10.8.5), Boot Camp

Posted on Dec 18, 2013 8:41 AM

Reply
Question marked as Best reply

Posted on Dec 18, 2013 1:23 PM

0. Make sure you have a backup.

1. Did you try the link in the other article? (The Number88 link).

2. fdisk has an interactive mode fdisk -e /dev/disk0 that can be used to edit a specific entry (use man fdisk in a separate terminal window, if necessary).

3. You may be hitting your D: which does not have an OS. More than likely (as supported by your Disk Utility output and the GPT output) the following partition is where your Windows installation is


738492416 238280704 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7


4. Can you boot Windows if you change partition #4 in fdisk -e /dev/disk0 to be this start/size combination and marking it as bootable (see the description of flag and edit commands under man fdisk).

5. The disk D: can be tackled once Windows is marked bootable.


From http://support.apple.com/kb/HT5639 ...


"How can a Windows partition be resized after Windows is installed?

You need to delete the Windows partition using the Boot Camp Assistant, and start over to change the size of the Windows partition. Back up your important Windows files first."

4 replies
Question marked as Best reply

Dec 18, 2013 1:23 PM in response to alprao

0. Make sure you have a backup.

1. Did you try the link in the other article? (The Number88 link).

2. fdisk has an interactive mode fdisk -e /dev/disk0 that can be used to edit a specific entry (use man fdisk in a separate terminal window, if necessary).

3. You may be hitting your D: which does not have an OS. More than likely (as supported by your Disk Utility output and the GPT output) the following partition is where your Windows installation is


738492416 238280704 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7


4. Can you boot Windows if you change partition #4 in fdisk -e /dev/disk0 to be this start/size combination and marking it as bootable (see the description of flag and edit commands under man fdisk).

5. The disk D: can be tackled once Windows is marked bootable.


From http://support.apple.com/kb/HT5639 ...


"How can a Windows partition be resized after Windows is installed?

You need to delete the Windows partition using the Boot Camp Assistant, and start over to change the size of the Windows partition. Back up your important Windows files first."

Boot Camp doesn't work after having created a new partition in OS X

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