SUGGESTIONS

If compression speed is your number one priority and you have large amounts
of memory to spare, then increasing the output buffer size (-bo) to a very
large size (256K+) will dramatically down on disk usage.

On the other hand, if you have a low memory situation, set the output
buffer size to a small value, such as 8K.  You should also set the work
directory to something other than the default, which is "T:", since T: is
generally assigned to "RAM:".