iostat graph help

Hi.  I am new to Hobbit, but so far it is an amazing tool.  I have been
trying to figure out how to add iostat graphs to the trends column, but I
have had no luck.  I was hoping someone already knows how to do this.  I
see that iostat already has a graph configuration ready to use, but I'm not
sure how to generate the rrd file.  Is there a way to graph iostat?  Thank
you for your help.


Regards,

Bryan Kennedy