Partition hard drive after OS installed

Using a command line or a GUI utility, is it possible to repartition the boot volume after the OS has been installed? I recall doing this a few years back while building a package with FORTRAN with .F files precompiling to .f files, so the package needed a case sensitive file system. At the time, someone gave me a solution, maybe using hdiutil, but cannot find it now. I looked into using Disk Utility, but could not get anywhere; I am pretty sure it was hdiutil or some other command line utility. Anyone have any experience with this? Please advise.

Hello jeff:
I not addressing your question, but, IMHO, there are very few reasons to partition an internal HD. Partitioning them will, almost assuredly, cause problems in the future. I also date back to the days when we routinely partitioned disk drives - for a variety of reasons. OS X manages resources very well.
Barry

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