Windows 7 partition gone after installing Yosemite

I don't know how to get a new thread. Yeah, I have two partitions for windows 7 pro x64. What I used to do was I installed windows 7 system on the partition BOOTCAMP which would be the local disk c: in win7, and I used partition DATA for other windows programs. Since windows is not as stable as OS , I can reinstall the windows when it is totally crashed without deleting other programs. The following was what I did ：

1. use bootcamp assistant to create win7 installation flash disk.

2. reboot, hold command+R, use disk utility to wipe the whole disk.

3. create three partitions, first two for windows, third for mac.

4. install OS system on third partition

5. after 4th. restart with flash disk plugged in, hold OPTION, then choose BOOTCAMP

6. install windows on second partition.

This was what I did. I don't know if I did correctly, but it worked for one year and I could easily reinstall windows again and again.

So what I need to is run these commends ?

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

I have created a new thread for you. Please post your information on Bootcamp thread for yi_D with Yosemite issues.

Hi Loner T

I had the same problem after Yosemite upgrade, could you please help on this. I posted the detail in the thread below. Thanks in advance.

Windows 7 Partition gone after Yosemite upgrade

Hey I am having the same problem with my Windows 8.1 disappearing after updating to Yosemite. I did all of the commands, but don't know how to make a new thread. If you could help me with this, it would be awesome. I too have assignments due on programs only on windows. Thanks!

If you go to the Bootcamp Discussion ( Boot Camp) and in the Search box type a question, it will give you a choice of submitting it to the community.

Dear All

I have found the solution 😉

You must install these programs 1- NTFS-3G and restart

2- TUXERA NTFS and restart your mac

now the BOOTCAMP should BE APPEAR

IF THE BOOTCAMP DRIVE NOT APPEAR AFTAR INSTALL THE PROGRAMS .... OPEN THE (( Terminal )) and Write

sudo ln -s /system/library/filesystems/fusefus.fs/mount_fusefs/usr/bin/mount_fusefs

Then pressenter .. now you must write your password .. when you write it it will not appear .. But continue and press enter.. then restart your mac and enjoy 😁

Alaa-Su wrote:

I have found the solution 😉

Tuxera is a commercial product, and it works, if you already have a working NTFS volume in the first place.

Hi Loner T,

Could you also help me? I've started a new thread.

Thanks!

bootcamp disk0s4 after update to mavericks

my output is as follows. please help.

I upgraded to Yosemite yesterday and after that my bootcamp windows partition has gone. After install NTFS-3G, it can be seen the disk utility app but it si still in gray.

My outputs for the commands below are as follows:

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

diskutil list

/dev/disk0

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Yosemite 303.0 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data Win7 Ent x64 70.0 GB disk0s4

diskutil cs list

No CoreStorage logical volume groups found

sudo gpt -vv -r show /dev/disk0

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

gpt show: /dev/disk0: Suspicious MBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/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 591712360 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

592122000 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

593391536 246995024

840386560 136718336 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

977104896 131

977105027 32 Sec GPT table

977105059 1 Sec GPT header

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 - 591712360] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 592122000 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 840386560 - 136718336] Win95 FAT32L

This gap usually indicates a Yosemite issue. You will need Testdisk and GPT Fdisk.

593391536 246995024

840386560 136718336 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

If you can follow Missing Bootcamp Partition (with pastes!) it should be fairly quick to fix the problem.

Thanks Loner T. I followed the approach in the post you pointed but I still can't boot into windows.

The answers to the questions you mentioned in the solution post are listed below

Test 1 - Does Bootcamp Volume show up in Finder? No.

Test 2 - Can you files in Bootcamp Volume? No.

Test 3 - Can you select Bootcamp in System Preferences -> Startup Disk? No. Only yosemite is there.

Test 4 - If Test 3 is successful, select Bootcamp and Click Restart.

Although I can't select bootcamp as startup disk in the system preferences, after pressing option key, I can see the windows drive. However, when I choose to start with it. it says disk error and press alt+ctrl+del to restart. It is more like what you said below.

"If you see a hanging underline cursor at the top left on a black screen, and it does not proceed further, you may need Windows Startup Repair or a tool called EasyBCD."

BTW, after the fix, the testdisk shows two warnings. I am not sure if the disk error is due to these warnings.

estDisk 7.0-WIP, Data Recovery Utility, October 2014

Christophe GRENIER <grenier@cgsecurity.org>

http://www.cgsecurity.org

Disk /dev/disk0 - 500 GB / 465 GiB - 977105060 sectors (RO)

Current partition structure:

Partition Start End Size in sectors

1 P EFI System 40 409639 409600 [EFI System Partitio

2 P Mac HFS 409640 592121999 591712360 [Mavericks]

3 P Mac Boot 592122000 593391535 1269536 [Recovery HD]

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

Warning: number of sectors per track mismatches 63 (NTFS) != 1 (HD)

4 P MS Data 840386560 977104895 136718336 [Microsoft basic dat

a]

P=Primary D=Deleted

>[Quick Search] [ Backup ]

Try to locate partition

Did you run a Deeper Search in Testdisk and find familiar Windows files including System Volume Information? YOu still are at the Quick Search, which will show you what you currently have, but not the lost partitions in the gap.

Thanks again. I will try to do a deep search and post the update.

Thank you so much. I have found the real windows partition using testdisk and have it recovered as you pointed in the instruction to dwilson00's post..

You are my hero!!!🙂🙂🙂

Please backup your OSX and Windows and use these backups as baseline for future restores. Previous backups will contain incorrect volume information.