The following article explains  what is Raid, what are important levels and how to install and configure a raid device in a linux system using the software mdadm. This is tested in Redhat rhel5 and also works with other distributions as fedora, centos etc. 


What is RAID?
RAID is redundant array of independent or inexpensive disks. It is mainly used for data protection. It protects our data storage from failures and dat...