tw_cli-plugin is a Nagios plugin for 3ware ATA RAID controllers.  

It works with all the serial and regular ATA controllers.

Before using the plugin, you must obtain the utility tw_cli from
3ware and place it in /usr/local/bin

Run the plugin with the following command line options:

  tw_cli-plugin <controller> <port>

e.g.
  tw_cli-plugin c1 p0

It is necessary to define one service check in Nagios for each drive
in your array.  The plugin will report the serial number of the
drive it has checked.