Under Device -> Health -> DiskIO tab the file systems are individually graphed? Is this what you are after? (whereas on the 'Overview' tab Disk IO is stacked)

From: Mihai - Cristian Satmarean <mihai.satmarean@gmail.com>
Reply-To: Observium <observium@observium.org>
Date: Tuesday, 1 October 2013 8:17 PM
To: Observium <observium@observium.org>
Subject: [Observium] separate diskio graphs for different devices

Hi all,

is it possible to have a separate graph for each entity in the DiskIO?

Scenario is that we try to monitor ZFS server and there are over 200 Filesystems that are shown on top of each other making the graph impossible to use.

Thanks!