Adaptec RAID can be monitored using the NRPE plugin which needs to be installed in the nagios server as well as the server being montiored.
Steps to be performed on the server being monitored:
First check the architecture of the server and make sure you download the appropriate source files.
root@host [~]# arch
Here its a 64 bit system.
arcconf is the command line utility for Adaptec based RAID.
root@host[~]# mkdir /usr/StorMan/
root@host[~]# cd /usr/StorMan/
root@host[~]# wget http://www.obvious.co.nz/aacraid/arcconf/arcconf-x64-6.10-b18350.tgz