mdmonitor and mdmpd
These two daemons are used with RAID (redundant array of inexpensive/independent disks) data storage systems. Mdmonitor starts, stops, and reloads the mdadm (multipath device monitoring and management) software RAID monitoring and management utilities.
You should only run these daemons if you have RAID storage in your system.
Learn more:
http://www.linuxdevcenter.com/pub/a/linux/2002/12/05/RAID.html
