Windows 7 Boot Camp Partition Not Recognizing Full Disk Space

It might be that your Windows partition is just fine, but it's your Protective Master Boot Record that's screwed up. Macs use the more modern GUID Partition Table (GPT) format to define where each of the partitions are, but for Boot Camp booting into Windows, you need a fake version of a traditional Master Boot Record (MBR) on the drive.

Apple's Boot Camp Assistant takes care of creating this "Protective Master Boot Record" or "PMBR" as they call it. Apple's tools are aware of the need for keeping the GPT and PMBR in sync, but perhaps GParted wasn't so careful.

There are third-party tools such as rEFIt that, among other things, can probably help you get your GPT and your PMBR back in agreement after some other tool has messed them up.

Or you might try using Mac OS X v10.7.x (Lion)'s Disk Utility to repair the drive. Make sure you select the whole disk, not a partition.

Another fix might be to use Disk Utility to slightly resize a partition, so that it has to rewrite the GPT and PMBR.

Here is what I've done:

I started with this situation, I formatted 200GB of my drive for OS X and left 51GB 'unallocated' for a Bootcamp partition later. I turned on File Vault and installed my programs. I could not create a new partition out of the unallocated space with Disk Utility or the Bootcamp Utility.

Since Bootcamp could not create a partition from the unallocated space, I chose to split the Macintosh HD partition into 2 partitions with Bootcamp.

After that, I deleted the bootcamp-volume with Disk Utility. After deleting the Bootcamp-volume, disk utility expands the main-os partition to its maximum size by using all unallocated space. That solved the problem!