How does RAID 5 & 6 work?
A. RAID (redundant array of independent disks) combines multiple hard drives into a single logical unit. Instead of seeing several different hard drives, the operating system sees only one. RAID 5 is a fault tolerant array of disks that uses parity data than can be used to reconstruct a single disk in the event of a disk failure. If one disk fails, it can be replaced by a new drive and the RAID management software automatically redistributes the data.