Repairing Boot Camp after creating new partition

Ok, that worked! I managed to get through to the recovery console where I ran /FixMbr and /FixBoot. (the command prompt returned succesful)

However, now when I reboot holding option, and select Windows, nothing happens. The screen freezes, and the computer doesn't try to do anything.

When I boot to OS X and go to System Preferences - Startup Disk, the Windows Bootcamp option is no longer there, so I can't force the comp to restart to Windows. I'm not sure exactly when Bootcamp dissapeared from Startup Disk, it may have already gone before I attempted these latest steps.

So just to summarise, I can see Windows as a bootable partition when restarting holding the option key, however nothing happens when I select it. And I cannot see Windows from within OS X's Startup Disk preferences pane.

UPDATE: I just tried the hold-option-while-restarting method again, and selected Windows.

This time it went to a black screen, where I received the message "Disk read error. Hold ctrl alt delete to restart"

It should be running chkdsk. You can also try fn+ctrl+alt+delete to nudge it, but can you run the dd command and check?

Also, can you post the output of fdisk again?

My results for [sudo gpt -r -vv show disk0] and [sudo fdisk /dev/disk0] are still the same as they were earlier (pictured in my initial post above).

In this time I probably could have reinstalled Windows, are got the programs I need up and runing again! Should I just look at doing this? Like I said, I have every file I need backed up.

It's worth mentioning that I have an old hard drive with a fully functional OSX Mavericks / Windows 8 setup (i don't use this hard drive for anything, I had just used it to test installations). Would it be worth using Winclone to copy that version of Windows to my current hard drive, instead of installing Windows all over again?

If your external HDD has all W8 setup as you want it, you can blow away the Bootcamp partition, resize your internal SSD to a single partition and restore your Winclone after you re-create the appropriate sized partition for the WinClone target.

Ok, that sounds like the best plan!

With regard to getting rid of my current Bootcamp partition, what is the safest way of doing this? Just using Bootcamp assistant? I didn't know if the changes made using gdisk might influence this.. so wanted to ask first just so i'm 100% safe!

You need to delete the Windows partition using the Boot Camp Assistant, and start over to change the size of the Windows partition.

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

Ok, thanks Loner T!

I'm making a WinClone image of my working-Windows partition now - the one on the external drive.

Then on my main drive (the problem-drive), I'll use bootcamp assistant to remove the faulty windows partition, and hopefully restore the full 512Gb to OS X. I'm a little worried there's gonna be some free space that get's lost... but let's see how it goes.

With the 512Gb of OS X, I can then re-make a windows partition - but i'll do this manually via Disk Utility. I'll make a 101Gb MS-DOS (FAT32) partition. The WinClone image I will be restoring from is 101Gb.

Finally, fingers crossed, I'll use my external drive to run WinClone, and restore the image i've made to that FAT32 parition.

I'll let you know how this goes. If you recommend any changes to this process, let me know!

jordan_ellipsis wrote:

Then on my main drive (the problem-drive), I'll use bootcamp assistant to remove the faulty windows partition, and hopefully restore the full 512Gb to OS X. I'm a little worried there's gonna be some free space that get's lost... but let's see how it goes.

If you delete the Bootcamp partition, the OSX SSD can be converted to a single partition scheme, till you are ready to re-partition for Winclone.

Your steps match this - https://www.twocanoes.com/winclone/support/create-a-boot-camp-partition and other FAQs.

Sucess! It worked! Thanks so much for your help Loner T!

A small note for anyone else attempting this: my first attempt to restore the Winclone image didn't work. The program just sat there idle, when it was supposed to be restoring. I found out it was because my destination partition was slightly too small (well, it was the exact same size as the Clone image, 101Gb). I increased my partition to something like 110Gb, and tried again. It worked!

So although I wasn't able to resolve the initial problem (to which this thread is dedicated), I at least now have a bootable windows partition again, and I can copy over my backed-up files.

Thanks again!

Hi T,

I can now boot from both windows and OSX after re-create the hybrid MBR. However, i find that i cannot read the Mac and FAT(formatted in osx) partition any more in windows even with bootcamp tool. Both partitions are marked as GPT Protective Partition. Is this expected? If there any method the make it readable again?

here is the screen

Thanks.

Can you provide the output of

diskutil list

sudo fdisk /dev/disk0

sudo fdisk /dev/disk2

There is a read-only HFS driver which is installed as part of Bootcamp drivers. Here is what I have in BootCamp.xml. You should not change the drive letters assigned to the drives, otherwise it causes excruciatingly painful issues.

<Component Name="AppleHFS.sys"GUID="*"SharedDLL="yes">

<File Name="AppleHFS.sys">

<KeyPath>yes</KeyPath>

<FileVersion>5.0.0.1</FileVersion>

</File>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleHFS</Key>

<Name>Type</Name>

<Type>integer</Type>

<Value>2</Value>

</Registry>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleHFS</Key>

<Name>ErrorControl</Name>

<Type>integer</Type>

<Value>1</Value>

</Registry>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleHFS</Key>

<Name>Start</Name>

<Type>integer</Type>

<Value>0</Value>

</Registry>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleHFS</Key>

<Name>Group</Name>

<Type>string</Type>

<Value>File System</Value>

</Registry>

</Component>

<Component Name="AppleMNT.sys"GUID="*"SharedDLL="yes">

<File Name="AppleMNT.sys">

<KeyPath>yes</KeyPath>

<FileVersion>5.0.0.0</FileVersion>

</File>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleMNT</Key>

<Name>Group</Name>

<Type>string</Type>

<Value>System Bus Extender</Value>

</Registry>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleMNT</Key>

<Name>Type</Name>

<Type>integer</Type>

<Value>1</Value>

</Registry>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleMNT</Key>

<Name>ErrorControl</Name>

<Type>integer</Type>

<Value>1</Value>

</Registry>

<Registry>

<Key>HKLM\SYSTEM\CurrentControlSet\Services\AppleMNT</Key>

<Name>Start</Name>

<Type>integer</Type>

<Value>0</Value>

</Registry>

</Component>

The following article refers to a manual installation of this driver, which should not be required.

http://www.markc.me.uk/blog/files/HFSOnWindows.html

Can you check your Windows Registry for the Registry keys referenced? Please do not modify the Registry, unless you really need to.

I'm also having trouble with BootCamp, the option to boot into Windows is gone. I can see the partition in Disk Utility and can navigate/copy the files from the Bootcamp partition through Finder. I'm comfortable using terminal, but I can't follow the other posts enough to work through the repair process.

I have a late 2013 MBP

Here is the result from sudo gpt -r -vv show disk0

gpt show: disk0: mediasize=500277790720; sectorsize=512; blocks=977105060

gpt show: disk0: Suspicious MBR at sector 0

gpt show: disk0: Pri GPT at sector 1

gpt show: disk0: Sec GPT at sector 977105059

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 684325792 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

684735432 1269544 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

686004976 93834512

779839488 197265408 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

977104896 131

977105027 32 Sec GPT table

977105059 1 Sec GPT header

And from sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60821/255/63 [977105060 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 - 684325792] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 684735432 - 1269544] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 779839488 - 197265408] Win95 FAT32L

And from sudo gdisk /dev/disk0

Password:

GPT fdisk (gdisk) version 0.8.10

Warning: Devices opened with shared lock will not have their

partition table automatically reloaded!

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: 977105060 sectors, 465.9 GiB

Logical sector size: 512 bytes

Disk identifier (GUID): C98AA61E-9742-489B-A350-287E1DBC41AA

Partition table holds up to 128 entries

First usable sector is 34, last usable sector is 977105026

Partitions will be aligned on 8-sector boundaries

Total free space is 93834649 sectors (44.7 GiB)

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

1 40 409639 200.0 MiB EF00 EFI System Partition

2 409640 684735431 326.3 GiB AF00 Macintosh HD

3 684735432 686004975 619.9 MiB AB00 Recovery HD

4 779839488 977104895 94.1 GiB 0700 BOOTCAMP

Command (? for help):

Any help is greatly appreciated, as I am trying to avoid losing information that can only be extracted once Windows is running correctly.

Thanks

.preatorian. wrote:

I'm also having trouble with BootCamp, the option to boot into Windows is gone.

686004976 93834512

Looks like the partitions were resized in Disk Utility to leave this "hole".

Your MBR needs to be corrected as the first step. Please see this link - https://discussions.apple.com/thread/5105628?answerId=22253524022#22253524022

You may also need Windows Repair after this is done.

Yes, that is correct. I was having an issue with the system and the Apple tech instructed me to make a "test" partition. You would think the Apple support staff would know the result of adding a partition when Bootcamp is used, I learned the hard way.

I followed the steps in the article and that seemed to repair the MBR, and Windows will now boot.

I tried to fully expand the Mac partition, but it never finishes the process and I am left with this:

Is there something else that needs to be fixed?