Unable to resize Bootcamp partition

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Unable to resize Bootcamp partition

I seem to be running into a strange issue with my partition sizes. I went into disk utility, hoping to resize my Bootcamp partition. I selected the parent drive Macintosh HD > Partition. The Utility shows I have three partitions, and that the drive is full, disabling the Partition area. However, if I select one of the partitions (Macintosh HD or BOOTCAMP), each has free space (see images). Macintosh HD has 2+ TB free and BOOTCAMP has 5 GB free.

I have tried doing a disk repair, but nothing gives. I can't figure out why there are two Macintosh HD partitions listed when I select the parent, and why I cannot remove one of them or merge them together. I am using a 3TB Fusion drive. Images below display the varying free space according to disk utility. Any thoughts?

Posted on Oct 6, 2013 8:15 PM

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Answer 1

Best reply

Allan Eckert

Level 9

79,512 points

Oct 6, 2013 8:22 PM in response to csorensen

Since you attempted to use Disk Utility on a disk with a BootCamp partition, the partition map for the disk is totally corrupt.

The only way I know to fix it now is to repartition the whole drive to a single partition

Then reinstall OS X

Restore all of your data from your backup

Create a new BootCamp partition

Reinstall Windows

Restore data from Windows backup

Allan

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Answer 2

csorensen Author

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Oct 6, 2013 8:23 PM in response to Allan Eckert

I hadn't tried anything yet though. I literally opened disk utility and couldn't do anything with the partitions. This was all I saw. I can click on the partitions, but the only one I can do anything with is bootcamp. I only get the option to delete it, which I don't want to do.

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Answer 3

Oct 6, 2013 8:28 PM in response to csorensen

Once you have a BootCamp partition, the disk is no longer in a state where Disk Utilty can be used.

Try CampTune available at http://www.paragon-software.com/home/camptune/

allan

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Answer 4

csorensen Author

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Oct 6, 2013 8:31 PM in response to Allan Eckert

Ah. I wish I had known that ahead of time. Doesn't look like CampTune supports Fusion drives at the moment. Would I need to format the bootcamp partition completely, then create a new one using Boot Camp Utility with the proper size?

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Answer 5

csorensen Author

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Oct 6, 2013 8:32 PM in response to Allan Eckert

My apologies. I didn't read through the full reply. I pulled it up in email, and it truncated it. Thanks for the help!

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Answer 6

Oct 6, 2013 8:35 PM in response to csorensen

Sorry. I missed the fact that you are using a Fusion Drive. Windows seems to have trouble with them.

Allan

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Answer 7

Oct 6, 2013 8:36 PM in response to csorensen

You are welcome

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Answer 8

AlRoRo

Level 2

175 points

Oct 6, 2013 9:20 PM in response to csorensen

It looks like you have a Fusion Drive installed - they are a bit different to standard drives - check http://support.apple.com/kb/HT5446 for additional information.

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