Check manual page of drbd.disk
Disk read and writes of DR:BD devices
This check uses the contents of /proc/drbd as sent by the Check_MK linux
agent. The check monitors the read and write disk I/O of each DRBD device.
At the moment this check does not use any thresholds.
The name of the DRBD device e.g. drbd0
Each configured DRBD device will result in one service during inventory. All
devices with the connection state "Unconfigured" are skipped.