DO install this test you also haveto do the following items:

1) use visudo to make sure the following is there:
Defaults:xymon !requiretty
Cmnd_Alias HWRAID = /opt/MegaRAID/MegaCli/MegaCli64 -AdpAllinfo -aALL, /opt/ArcRAID/bin/arcconf getconfig 1 AL
xymon   ALL=(ALL)   NOPASSWD: HWRAID

2) install compat-libstdc++-33 (needed by arcconf)

3) install arcraid tools
a) create directory /opt/ArcRAID/bin/
b) cd /opt/ArcRAID/bin/
c) wget http://repo.hpc.lsu.edu/files/xymon-ext/hwraid/arcraid/arcconf
d) if arccond does not work, you will need to go to http://repo.hpc.lsu.edu/files/misc/arcconf/, download the appropriate version and build it