I was partitioning my main hard drive when the computer quit, had to restart and now main hard drive shows only 546 GB of the 750 GB available. But does not show a second partition. If I go to partition the hard drive and click on the plus sign, 206 GB show up. I have tried deleting the 206 but to no avail, how do I get the main drive back to 750 GB? Also if I try and shrink the partition to 100 GB, I wind up getting this message: Partition failed with the error: Couldnt modify partition map because file system verification failed.. Besides doing a full format how can I get the main drive back to 750 GB?