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

Apr 13, 2016 5:33 AM in response to Loner T

sorry, very unexperienced with osx

cannot succeed to run testdisk, what am i doing wrong ?

Oliviers-MBP:Downloads ozeegers$ cd testdisk-7.0

Oliviers-MBP:testdisk-7.0 ozeegers$ ls

78 THANKS photorec

AUTHORS VERSION photorec.8

COPYING documentation.html qphotorec.8

INFO fidentify readme.txt

NEWS fidentify.8 testdisk

README icons testdisk.8

Oliviers-MBP:testdisk-7.0 ozeegers$ sudo testdisk

Password:

sudo: testdisk: command not found

Oliviers-MBP:testdisk-7.0 ozeegers$

ozeegers Author

Level 1

5 points

Apr 13, 2016 5:43 AM in response to ozeegers

ok, got it..

I should have not gone into the testdrive folder but issue the command testdrive-7.0/testdrive instead (with sudo)

I'll read the rest in the example post..

ozeegers Author

Level 1

5 points

Apr 13, 2016 5:59 AM in response to ozeegers

disk not writable like other post, continued

chose GPT/EFI

then this screen:

TestDisk 7.0, Data Recovery Utility, April 2015

Christophe GRENIER <grenier@cgsecurity.org>

http://www.cgsecurity.org

Disk /dev/rdisk0 - 750 GB / 698 GiB (RO)

1465149168 sectors - sector size=512

>[ Analyse ] Analyse current partition structure and search for lost partitions

[ Advanced ] Filesystem Utils

[ Geometry ] Change disk geometry

[ Options ] Modify options

[ Quit ] Return to disk selection

Note: Correct disk geometry is required for a successful recovery. 'Analyse'

process may give some warnings if it thinks the logical geometry is mismatched.

-------------------------------------------------------------------------------- ------

TestDisk 7.0, Data Recovery Utility, April 2015

Christophe GRENIER <grenier@cgsecurity.org>

http://www.cgsecurity.org

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]

2 P Mac HFS 409640 538608447 538198808 [Apple HFS/HFS+]

3 P Mac Boot 538608448 539877983 1269536 [Recovery HD]

Warning: number of heads/cylinder mismatches 255 (FAT) != 1 (HD)

Warning: number of sectors per track mismatches 32 (FAT) != 1 (HD)

4 P MS Data 539877984 1464886983 925009000 [Microsoft basic data] [BOOTCAMP]

P=Primary D=Deleted

>[Quick Search] [ Backup ]

Try to locate partition

Loner T

Level 9

59,536 points

Apr 13, 2016 6:07 AM in response to ozeegers

Please run Quick Search. Do not make any changes via Testdisk to any partitions. It can cause worse problems because there is a hybrid MBR involved.

ozeegers Author

Level 1

5 points

Apr 13, 2016 6:15 AM in response to Loner T

Loner T

Level 9

59,536 points

Apr 13, 2016 8:20 AM in response to ozeegers

This is a list of unrecoverable partitions. Press Enter/Return (only once) to Continue. You should see a list of recoverable partitions.

ozeegers Author

Level 1

5 points

Apr 13, 2016 8:37 AM in response to Loner T

estDisk 7.0, Data Recovery Utility, April 2015

Christophe GRENIER <grenier@cgsecurity.org>

http://www.cgsecurity.org

Disk /dev/rdisk0 - 750 GB / 698 GiB - 1465149168 sectors (RO)

Partition Start End Size in sectors

>P EFI System 40 409639 409600 [EFI]

P Mac HFS 409640 538608447 538198808

P Mac HFS 538608448 539877983 1269536

D MS Data 539877984 1464886983 925009000 [BOOTCAMP]

D MS Data 539879424 1465145343 925265920

D MS Data 1075445760 1465147391 389701632

D Mac HFS 1463879592 1465149127 1269536

Structure: Ok. Use Up/Down Arrow keys to select partition.

Use Left/Right Arrow keys to CHANGE partition characteristics:

P=Primary D=Deleted

Keys A: add partition, L: load backup, T: change type, P: list files,

Enter: to continue

FAT32, blocksize=512, 209 MB / 200 MiB

ozeegers Author

Level 1

5 points

Apr 13, 2016 8:41 AM in response to ozeegers

EFI SYSTEM FAT32, blocksize=512, 209 MB / 200 MiB ; structure OK

MAC HFS1 HFS+ blocksize=4096 + Backup, 275 GB / 256 GiB; structure OK

MAC HFS2 HFS+ blocksize=4096 + Backup, 650 MB / 619 MiB; structure OK

MS DATA1 FAT32, blocksize=32768, 473 GB / 441 GiB; structure OK

MS DATA2 NTFS found using backup sector, blocksize=4096, 473 GB / 441 GiB; structure OK

MS DATA3 NTFS found using backup sector, blocksize=4096, 199 GB / 185 GiB; structure OK

MS DATA4 HFS+ found using backup sector!, 650 MB / 619 MiB; structure OK

Loner T

Level 9

59,536 points

Apr 13, 2016 9:17 AM in response to ozeegers

The following partition

D MS Data 539877984 1464886983 925009000 [BOOTCAMP]

is your current GPT4, which does not work.

This one looks like it is the correct one.

D MS Data 539879424 1465145343 925265920

Please scroll down to this entry using the down arrow key, and press 'p' to list files. Your partition table should look like this, if this entry is the correct one.

GPT 3 Start	GPT 3 Size	GPT 3 End	NTFS Start	Sector Offset	NTFS Size	NTFS End	Sector Offset (MB)	NTFS(Gb)	Disk End	Disk Difference
538608448	1269536	539877984	539879424	1440	925265920	1465145343	1	441.20	1465149168	3825

ozeegers Author

Level 1

5 points

Apr 13, 2016 9:38 AM in response to Loner T

p of this entry:

TestDisk 7.0, Data Recovery Utility, April 2015

Christophe GRENIER <grenier@cgsecurity.org>

http://www.cgsecurity.org

MS Data 539879424 1465145343 925265920

Directory /

>dr-xr-xr-x 0 0 0 5-Apr-2016 23:59 .

dr-xr-xr-x 0 0 0 5-Apr-2016 23:59 ..

-r--r--r-- 0 0 4294967296 5-Apr-2016 13:52 pagefile.sys

Loner T

Level 9

59,536 points

Apr 13, 2016 9:46 AM in response to ozeegers

Can you press Escape (only once) and check the output of the 'p' command for the other two MS Data entries?

ozeegers Author

Level 1

5 points

Apr 13, 2016 9:53 AM in response to ozeegers

I don't see how I move to the directory above (up). In MSDOS one selects the '..' and press ENTER but nothing happens.

Do I have to start the sequence all over again to see files of the other entries ?

Loner T

Level 9

59,536 points

Apr 13, 2016 10:01 AM in response to ozeegers

Press Escape only once to get out of this 'p' listing.

ozeegers Author

Level 1

5 points

Apr 13, 2016 10:03 AM in response to Loner T

bootcamp part:

>D MS Data 1075445760 1465147391 389701632:

>D Mac HFS 1463879592 1465149127 1269536:

Loner T

Level 9

59,536 points

Apr 13, 2016 10:30 AM in response to ozeegers

Press Escape just once. If you do not see your Quick Search list, you may have to start over. You can also try the Deeper Search but it take a long time.

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bootcamp partition renamed untitled after booting in MacOS