When I installed my Macbook Pro, I had a 1Tb drive. When I formatted and partitioned the drive, I assigned 800Gb for OSX and left 200Gb free. I intended the free 200Gb to hold a Windows installation at a later date.
Well, the later date has come, and Boot Camp Assistant wants to partition my drive with 780Gb for OSX and 20Gb for Windows. Clearly it's planning to resize my logical OSX partition down and create a new partition for Windows 7.
Is there some way to get Boot Camp Assistant to instead use the free space on the drive I reserved for this purpose? Perhaps use Disk Utility to format that free space for Windows 7 before running Boot Camp Assistant? If so, what sort of file system should I create?
Some more details: from running diskutil, I see that my disk0 is a 1TB drive partitioned into a 200MB EFI partition, an 800GB LVM partition, a 650MB recovery partition, and 200GB of unused space. The 800GB LVM partition is a physical volume containing a single 800GB logical volume mounted as disk1. Clearly, Boot Camp Assistant is trying to repartition this LVM physical volume rather than the actual disk0.