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Level 1

5 points

bootcamp partition renamed untitled after booting in MacOS

Can anybody please help me ?

I had succesfully installed Windows 10 on my Macbook Pro and ran Windows already several weeks smoothly.

Unfortunately I did not make a backup of my windows files yet.

Today when I booted to El Capitan to connect my iPad to iTunes Windows gave me a message that it needed repair when I tried to reboot to the bootcamp Windows version.

It did not succeed in repairing and only gave my an advanced options menu.

I booted back into MacOS to find that the windows partition was renamed to 'Untitled' and that no files were visible in Finder.

I than ran Disk Utility and selected First Aid on this partition, I thought this was read only to check for disk errors.

Now when booting from Windows it says no operation system available and Disk Utility shows 496 GB empty space on this partition !

I hope not all my files are lost !!

What can I do to repair the bootcamp partition ? I tried to install setup bootcamp files on USB but cannot boot from USB (does not show the USB drive)

thank you !

Olivier

MacBook Pro, OS X El Capitan (10.11.3), Bootcamp Windows 10

Posted on Apr 5, 2016 11:34 AM

297 replies

ozeegers Author

Level 1

5 points

May 13, 2016 2:28 PM in response to Csound1

Ok? So not of a lot of help in my case?

Can you please look at this thread to see if you can come up with a good suggestion to get my files back?

Thank you so much!

Loner T

Level 9

59,477 points

May 13, 2016 2:31 PM in response to ozeegers

You can also check PhotoRec included with the Testdisk download.

ozeegers Author

Level 1

5 points

May 14, 2016 5:54 AM in response to Loner T

fdisk shows this:

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 0 0 2 - 25 127 14 [ 1 - 409639] <Unknown ID>

2: AF 25 127 15 - 1023 254 63 [ 409640 - 538198808] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 538608448 - 1269536] Darwin Boot

*4: 0C 0 0 0 - 0 0 0 [ 0 - 0] Win95 FAT32L

Loner T

Level 9

59,477 points

May 14, 2016 7:56 AM in response to ozeegers

ozeegers wrote:

fdisk shows this:

*4: 0C 0 0 0 - 0 0 0 [ 0 - 0] Win95 FAT32L

This is incorrect. If you do not have a pointer to start/size in entry for the Bootmanager to work with.

ozeegers Author

Level 1

5 points

May 14, 2016 7:56 AM in response to Loner T

Dear Loner T,

I would like to thank you very much for your kind effort you put into my case.

Unfortunately we were not able to resolve the problem so I posted the same question on the macrumors forum.

When I get a solution there I will post it here !

Thank you so much for your time !!

yours, Olivier

Loner T

Level 9

59,477 points

May 14, 2016 8:08 AM in response to ozeegers

Can you post the link to the MacRumours thread?

ozeegers Author

Level 1

5 points

May 14, 2016 8:10 AM in response to Loner T

http://forums.macrumors.com/threads/bootcamp-partition-renamed-untitled-after-bo oting-in-macos.1972585/

Loner T

Level 9

59,477 points

May 14, 2016 8:28 AM in response to ozeegers

Did you correct your MBR and update the last entry?

ozeegers Author

Level 1

5 points

May 14, 2016 8:30 AM in response to Loner T

I sincerely do not know exactly how to do this ?

Can you describe met the steps ?

Loner T

Level 9

59,477 points

May 14, 2016 8:39 AM in response to ozeegers

You have done it here - Re: bootcamp partition renamed untitled after booting in MacOS . The Fdisk commands are meant to update an existing MBR, and are not used to create a new one. The Gdisk commands can create/update a new MBR much more easily than Fdisk can.