Interested in showing delta/growth of filesystems, in MB, not % as is default. Someone must have done this by now... ok if it's just in the legend and not a line in graph. This way on my monthly reports >you get both visual as shown currently, but for the time span shown, the delta in MB is shown.
It is built into xymon, just not shown by default.
When you click on your disk graph your url will contain "service=disk" as part of it. Change it to say "service=disk1"
If you want to change the units displayed eg. MB - not KB, you will need to edit hobbitgraph.cfg, CDEF for the disk1 definition.
Craig