Partitioning using Disk Utility Gone Wrong

Question

I have been attempting to partition my hard drive so that I can install windows 7 to my computer (Late 2010 Macbook Pro, 13inch, currently using Mavericks), but Bootcamp was not working for whatever reason.  I instead tried to partition my hard drive using Disk Utility, and after getting about half way through the partition process, realized that I had not changed the size of the new partition to the size I wanted (automatically, the new partition takes up half of the hard drive, but I wanted it to take up much less than that).  I closed out of Disk Utility in an attempt to cancel the partition process, and a pop up told me that I had "unsaved changes" to the partition that would be lost.  Thinking that I wanted to lose the changes, I clicked accept, and exited out of the program.  However, now, Disk Utility is claiming that I only have about 12 GB of space left on my hard drive, even though I had over 200GB left before.  How do I get this space back?

Answer 1

Last login: Thu Apr 10 18:03:08 on console
wr-130-64-184-253:~ betsyk$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *320.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            319.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
wr-130-64-184-253:~ betsyk$ diskutil cs list
No CoreStorage logical volume groups found
wr-130-64-184-253:~ betsyk$ mount
/dev/disk0s2 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
wr-130-64-184-253:~ betsyk$ df -m /
Filesystem   1M-blocks   Used Available Capacity  iused   ifree %iused  Mounted on
/dev/disk0s2    304425 274476     29698    91% 70329971 7602931   90%   /
wr-130-64-184-253:~ betsykirtland$