partitioning to install windows error messages

I have been trying to partition my mac so that I can install windows on the other side... I keep getting a very non descriptive error message "Verification failed. This disk could not be partitioned."
went in and tried to fix the problem in disk utility, the correct action (I'm pretty sure) is to "repair disk" but it is greyed out. everything else is available, when I do "permission repair" everything works. when I do verify disk, I get errors that there are "invalid volume file count"

Does anyone know what any of this means? Any insight would be helpful.
Thanks!