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Windows not starting after resizing the Partition..

Hey guys

i've got a huge problem.

I have an iMac 2007, running both, OSX and Windows via Bootcamp. All worked fine, till i wanted to resize the OSX Partition to increase the Bootcamp one. I already did this one time, but this time this did not work. My OSX works perfectly, but Bootcamp doesn't start anymore. I can select it in the bootmenu, but it just says 'missing operation system...'. I already tried rEFIt, but this did not worked, it just synchronized something.

Here is a screenshot of my harddrive in disk utility:


User uploaded file

If you need this, i have done this too:


User uploaded file


I know this problem is well known here, but i didn't found any solutions on my specific case here..:(

Thanks for your help!

Sorry if my english isn't on a that high level, i'm german 🙂

iMac, OS X Yosemite (10.10.3), null

Posted on Apr 18, 2015 4:58 AM

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Question marked as Best reply

Posted on Apr 18, 2015 6:39 AM

1. Your Recovery HD is missing.

2. You have a large gap between GPT3 and GPT4, which is the most likely place where you have a lost NTFS header.

3. Can you use Bootcamp partition missing after yosemite installation as a reference and start with a Testdisk scan?

41 replies

Apr 18, 2015 12:29 PM in response to Loner T

NTFS 3G, to use my external NTFS HD. Shall i remove this?

Here the output:


Bastians-iMac:~ bastianfischer$ diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *250.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 70.9 GB disk0s2

3: Microsoft Basic Data BOOTCAMP 148.7 GB disk0s3

Bastians-iMac:~ bastianfischer$ sudo dd if=/dev/rdisk0s3 count=1 2>/dev/null | hexdump -C

Password:

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 00 e0 bd 0b |........?.......|

00000020 00 00 00 00 80 00 80 00 ff 67 50 11 00 00 00 00 |.........gP.....|

00000030 5b 04 00 00 00 00 00 00 5a 04 00 00 00 00 00 00 |[.......Z.......|

00000040 f6 00 00 00 01 00 00 00 c0 92 cc 8f 12 26 d0 01 |.............&..|

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 52 11 16 68 09 00 66 53 66 53 66 |h...hR..h..fSfSf|

00000100 55 16 16 16 68 b8 01 66 61 0e 07 cd 1a 33 c0 bf |U...h..fa....3..|

00000110 0a 13 b9 f6 0c fc f3 aa e9 fe 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 a1 f6 01 e8 09 00 |...u...fa.......|

00000170 a1 fa 01 e8 03 00 f4 eb fd 8b f0 ac 3c 00 74 09 |............<.t.|

00000180 b4 0e bb 07 00 cd 10 eb f2 c3 0d 0a 41 20 64 69 |............A di|

00000190 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 6f 63 |sk read error oc|

000001a0 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d 47 52 |curred...BOOTMGR|

000001b0 20 69 73 20 63 6f 6d 70 72 65 73 73 65 64 00 0d | is compressed..|

000001c0 0a 50 72 65 73 73 20 43 74 72 6c 2b 41 6c 74 2b |.Press Ctrl+Alt+|

000001d0 44 65 6c 20 74 6f 20 72 65 73 74 61 72 74 0d 0a |Del to restart..|

000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|

000001f0 00 00 00 00 00 00 8a 01 a7 01 bf 01 00 00 55 aa |..............U.|

00000200

Apr 18, 2015 3:22 PM in response to Loner T

I rebooted, and my Windows first did not start. There was an option to reboot again or to repair. I rebooted and it started, just as usually 🙂 but after restarting, to get to osx again, no os was there. no option in the startmenu.. 😟 i wanted to boot from my 10.6 dvd, to at least see disk utility and suddenly both operating system appeared again, i booted into osx and all is fine here. 🙂

Do i have to do anything else now?

Apr 18, 2015 3:28 PM in response to Bastianum

Can you switch between OS X and Windows using System Preferences and Control Panel -> Boot Camp?


Use System requirements to install Windows on your Mac via Boot Camp - Apple Support and Boot Camp: Install or repair Boot Camp drivers, if necessary.


You need to back up both OSes. You also need to get Recovery HD in place. You can re-install OS X to get you Recovery HD back, but only after you back up both OSes.

Windows not starting after resizing the Partition..

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