Graph Template: Unix - Available Disk Space

[The00Dustin]

The template named in the subject does not seem to return accurate data for my Linux Machines. When I set up this Cacti server it had ~20G used on the disk. Now it has ~46G used. All of the graphs for all of my servers show very similar data. I assumed it was accurate at first, but then I noticed it wasn't changing for this server. Most of the servers have 160GB HDs, but one of them has a 2TB RAID-Array, and its graph is identical to the one attached (minus the downtime). On top of that, some of the servers have more than one real /dev/md device and others have none, but all show only /dev/md0 as available on the create new graphs page. Am I missing something? What do I need to do? TIA