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Repairing bootcamp after extending Windows partition

Hallo

I have a Mac air with windows on it.

I was extending the partition for windows, first by allocating 10 gb from mac, I then wanted to open windows and locate the 10 gb there, but could not open windows , the error that occur was "missing operation".

when i use the following solution:

sudo fdisk -e /dev/disk0s4

setpid 4

flag 4

write

after "sudo fdisk -e /dev/disk0s4" its says "resource Busy"

when i try to active the disk and the partition in windows repair utility, its tells me "ACTIVE kan only be used on MBR disk"

Sorry for my bad English, i really hope someone can help.

MacBook Air, OS X El Capitan (10.11.3), Windows 7 Pro N

Posted on Feb 5, 2016 5:01 AM

35 replies

Loner T

Level 9

59,471 points

Feb 10, 2016 5:37 AM in response to JIB BER

Can you mark C: as active in Diskpart before you try to rebuildBCD?

JIB BER Author

Level 1

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Feb 10, 2016 6:33 AM in response to Loner T

i don't work.

Loner T

Level 9

59,471 points

Feb 10, 2016 6:38 AM in response to JIB BER

If you have C: active, please rebuildBCD. The old store may not be very useful.

JIB BER Author

Level 1

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Feb 10, 2016 9:06 AM in response to Loner T

I did but it wan't rebuild, and yes C: is active.

i get element not found

JIB BER Author

Level 1

0 points

Feb 11, 2016 2:16 AM in response to Loner T

Thanks for your help, with the first thing. but could not wait. Hade a deadline where my computer was importent. So i did install windows again.

But thanks for your help.

Repairing bootcamp after extending Windows partition