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Level 1

3 points

Lost Space After Removing Bootcamp Partition

After upgrading my computer to Yosemite I noticed my Windows 7 partition was no longer a boot option. After trying and failing at several things to fix the problem I decided to cut my losses and just reformat the partition. However, Disk Utility raised and error when trying to remove the partition (MediaKit reports no such partition...). I booted in Single user mode and ran fsck -fy and the rogue partition is gone, and Disk Utility is reporting that my Hard drive has a capacity of 250 GB (as it should). But the single Macintosh HD Partition still reports only a capacity of 173 GB, as it did when my drive was still partitioned.

I would just really like to know where those ~75 GB went and if/how I can get them back.

Thanks in advance.

MacBook Pro

Posted on Mar 19, 2015 8:12 PM

47 replies

us1985mc

Level 1

0 points

Oct 23, 2015 2:32 AM in response to Loner T

Thanks for the above, however I found my results when entering the command lines are not exactly as Jazzy's. My results are not showing any free space (4KB), it is as if my 500GB drive is now a 377.4 GB drive. Any thoughts?

Loner T

Level 9

59,471 points

Oct 23, 2015 4:22 AM in response to us1985mc

1. Backup OS X and install the current version of OS X on an external drive using Command+R.

2. Revert your CS to JHFS+ using diskutil cs revert.

2. Merge the Recovery HD into OS X using diskutil mergePartitions (very carefully. The order for the disks in the commands is critical).

3. Re-install OSX to get you Recovery HD back.

4. Retry BC Assistant after your disk space is back.

us1985mc

Level 1

0 points

Oct 23, 2015 3:10 PM in response to Loner T

Thanks Loner T,

So I got through to the merge portion and got this message. Any suggestions?

Loner T

Level 9

59,471 points

Oct 23, 2015 3:20 PM in response to us1985mc

1. You have FileVault. Please disable it.

2. Your diskutil cs revert should have failed. This will in turn cause the mergePartitions to fail.

3. Can you post the current state?

us1985mc

Level 1

0 points

Oct 23, 2015 3:27 PM in response to Loner T

Loner T,

So I check and made sure FileVault is off. Here is the current status. When I did the revert, it said I had to pick a logical drive ID so I used disk1 which was the logical disk ID, I think that is why it worked.

us1985mc

Level 1

0 points

Oct 23, 2015 3:29 PM in response to Loner T

Loner T,

Here is the log from when I was doing the revert portion.

Loner T

Level 9

59,471 points

Oct 23, 2015 3:37 PM in response to us1985mc

us1985mc wrote:

Notice the last line. You need to wait for the decryption to finish, before you run the mergePartitions. It is still in progress in the background. As long as diskutil cs list shows output, you cannot run mergePartitions.

us1985mc

Level 1

0 points

Oct 23, 2015 3:43 PM in response to Loner T

Loner T,

So I ran that line and checked it as it went through the process. It now shows complete as per my last upload of the diskutil cs list command.

Loner T

Level 9

59,471 points

Oct 23, 2015 3:47 PM in response to us1985mc

Diskutil cs list should not return any output for it to be complete. You may be confused by AES-XTS complete.

us1985mc

Level 1

0 points

Oct 23, 2015 3:53 PM in response to Loner T

Loner T,

Oh ok, so keep trying the command until there is no output from "diskutil cs list"?

Is that correct? There is an operation going on in the back ground?

Loner T

Level 9

59,471 points

Oct 23, 2015 3:52 PM in response to us1985mc

You should see this.

diskutil cs list

No CoreStorage logical volume groups found

us1985mc

Level 1

0 points

Oct 23, 2015 3:57 PM in response to Loner T

Loner T,

Did I do the revert correctly then? So just let it run over night and see if it finishes by morning?

Loner T

Level 9

59,471 points

Oct 23, 2015 4:03 PM in response to us1985mc

Yes, you did. It may not take overnight, but as long as you do not close the lid and the Mac does not sleep, it should be doe by the morning. Sleep will just pause the current decryption.

Oct 23, 2015 5:32 PM in response to Loner T

Hi All, after messing around with BCA and having little luck I've managed to mess up my drive, see below, I'm missing a couple of hundred GB from the macintosh fusion drive. (usual around 2.1TB now at 1.79. Any thoughts on how to fix this?

Loner T

Level 9

59,471 points

Oct 23, 2015 5:39 PM in response to Casperelli

Can you start a new discussion (to avoid confusion - this thread has several different issues mixed in) and post the output of the following commands from OS X Terminal?

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

Lost Space After Removing Bootcamp Partition