So I had Yosemite for a while, and a couple of days ago I reinstalled Mavericks on a separate partition; they were running along side each other, and all was well. Today, I removed the Mavericks partition from Yosemite, using Disk Utility, and it worked, however, it has left it as "Free Space". Which is not what I want, as I was planning on installing Windows using Bootcamp soon. Despite trying to turn the Free Space into a Mac OS Extended (Journaled) Partition and then trying to erase that, it didn't work, it just wouldn't make the partition. The Log just says "2015-03-05 19:52:06 +0000: Preparing to partition disk: APPLE HDD ST500LM012 Media" but then nothing happens. Any ideas on how I can fix this, preferably very soon?