Bootcamp Partition Missing after Resize

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Level 1

8 points

Bootcamp Partition Missing after Resize

Hi

I was trying to follow online tutorials for non-destructively resizing my Win7 bootcamp from running out of space.

After using disk utility to shrink down the MacOS, however, the bootcamp partition is still there in disk utility and Finder, but when I restarted, pressing ALT into the booting selection, the windows system was missing and has been that way ever since..

From the disk utility, it looks like this↓

Could anybody help me out of this without deleting the windows?

System is OS X El Capitan 10.11.6

Thanks a lot!

MacBook Pro with Retina display, OS X El Capitan (10.11.6)

Posted on Dec 2, 2016 7:04 AM

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Answer 1

Top-ranking reply

Loner T

Level 9

59,536 points

Dec 18, 2016 5:43 PM in response to gaor12

Please install GPT Fdisk - https://sourceforge.net/projects/gptfdisk/ .

Your Start and Size values come from the MBR, not the current GPT values. They should be 763398144 and +213706752 respectively.

See the first set of Gdisk steps as an example - Re: El Capitan has deleted my bootcamp windows partition .

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Answer 2

Loner T

Level 9

59,536 points

Dec 18, 2016 10:47 AM in response to gaor12

If you notice, you have two entries at index 4 in your GPT. We need to remove both and correct the GPT to match the MBR start/size values. Please disable SIP using Local Recovery and the csrutil disable command from Utilities -> Terminal.

Once it is disabled and you are booted normally (do not type such text), then run

sudo gdisk /dev/disk0

m (Main menu)

p (Print)

d (Delete)

4 (GPT4)

n (New)

4 (GPT4)

(Enter the start value from the MBR)

(Enter the size value from the MBR preceded by the '+' sign)

p (Print)

w (Write)

y (Confirm write)

Reboot and test.

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Answer 3

Loner T

Level 9

59,536 points

Dec 17, 2016 8:49 AM in response to gaor12

Please post the output of

sudo fdisk /dev/disk0

sudo gpt -vv -r show /dev/disk0

You have a GPT and MBR mismatch. Your disk space does not add up correctly.

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Answer 4

Loner T

Level 9

59,536 points

Dec 17, 2016 4:54 PM in response to gaor12

Can you post the output o f

sudo gpt -vv -r show /dev/disk0

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Answer 5

Loner T

Level 9

59,536 points

Dec 15, 2016 8:22 AM in response to gaor12

Can you post the output of

sudo gpt -vv -r show /dev/disk0

This will show us the 'gap'.

You can use GParted as shown in this link and then Repair your Windows installation using the Windows installer or bootrec.exe to expand the Windows partition.

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Answer 6

Loner T

Level 9

59,536 points

Dec 17, 2016 7:12 AM in response to gaor12

You can use a GParted live USB. You will also need to repair W7 after you have extended the partition using GParted.

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Answer 7

Loner T

Level 9

59,536 points

Dec 2, 2016 8:34 AM in response to gaor12

Since you have a hybrid MBR, resizing will cause further issues if a tool is used form Windows side. It is better to resize the underlying GPT partition first. You will need to convert RESIZE to Free Space first. Please see this link as an example. It also requires rebuilding the MBR and running Startup Repair.

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Answer 8

gaor12 Author

Level 1

8 points

Dec 2, 2016 8:46 AM in response to Loner T

Hi, thanks for the prompt aid, there's quite a lot of professional knowledge to take in here,

I checked the link, so in general, I would need a win7 installation DVD/flash drive for the startup repair?

Would I need to be first able to boot into win7 again to resize the GPT partition (the win7 is still operable from the Parallels Desktop), or is should this be done with Disk utility?

RESIZE is currently FAT32 format, what would a free space look like?

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Answer 9

Loner T

Level 9

59,536 points

Dec 2, 2016 9:06 AM in response to gaor12

To convert RESIZE to Free Space, run the following command only once otherwise you will lose data. This is because Free Space does not have a disk slice associated with it. It is a one-way operation.

diskutil eraseVolume free free disk0s4

This will return an error because no disk slice will re-appear.

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Answer 10

gaor12 Author

Level 1

8 points

Dec 14, 2016 4:25 PM in response to Loner T

Hi, sorry about the delay, I've been held up by exams for a quite while, hope you are still there!

I am backing up the data again and is ABOUT to run the command you provided above.

What would be the next step?

Thanks.

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Answer 11

gaor12 Author

Level 1

8 points

Dec 16, 2016 2:15 PM in response to Loner T

Sure, here's the result.

A slight problem though, I currently got no access towards a disk drive, but have plenty of flash drives, would that work?

Would I need both Win7 and GParted CD to proceed,

and will the fact that my win7 is operable under parallels desktop be of any help?

Cheers!

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Answer 12

gaor12 Author

Level 1

8 points

Dec 17, 2016 7:16 AM in response to Loner T

Thank you very much for the professional advice, I've made substantial progress after these steps, now the win7 is again bootable after startup repair, and the system size is expanded smoothly.

Another small issue remains however, that I've been unable to setup a virtual machine in Parallels Desktop via Import from Bootcamp option, and the win7 system is not visible in Mac-Preferences-Startup disk option.

http://kb.parallels.com/cn/11244

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Answer 13

gaor12 Author

Level 1

8 points

Dec 17, 2016 7:33 AM in response to Loner T

I found a folder named NTFS-3g, under

/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/fuse/n tfs-3g

but that's it. Shall I go ahead and delete it?

There also seem to be a bigger problem, I don't see a bootcamp partition in the Disk Utility.

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Answer 14

gaor12 Author

Level 1

8 points

Dec 18, 2016 5:01 PM in response to Loner T

Successfully disabled SIP, but sudo gdisk command is returned with "command not found".

(Enter the start value from the MBR)

(Enter the size value from the MBR preceded by the '+' sign)

is it the

763398144

+76173312

I should enter, one at a time?

Many thanks

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Answer 15

gaor12 Author

Level 1

8 points

Dec 18, 2016 7:08 PM in response to Loner T

Thanks a lot, that was a lot of tricky command line operations, but looks like things are working in good order. +213706752 is simply the sum of the two previous partition 4 size, I figure 🙂

The partition is back in disk utility, preference - startup disk, accessible in MacOS and bootable.

Is there anything else to fix?

I still don't get a "import from bootcamp" option in Parallels Desktop, but anyway that's more of a product specific question, guess I'll just search for solutions from their website.

*Update: the option is back after running command as posted here

http://kb.parallels.com/116235

ls /Volumes df -h diskutil list

Thanks a lot

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