In computing, a redundant array of inexpensive disks (more commonly known as a RAID) is a system of using multiple hard drives for sharing or replicating data among the drives. Depending on the version chosen the benefit of RAID is a one or more of increased data integrity, fault-tolerance, throughput or capacity compared to single drives.

Standard RAID levels

• 
  RAID 0
• 
  RAID 1
• 
  RAID 2
• 
  RAID 3
• 
  RAID 4
• 
  RAID 5
• 
  RAID 6

Nested RAID levels

• 
  RAID 01 (nested)
• 
  RAID 01 (hybrid)
• 
  RAID 03
• 
  RAID 10
• 
  RAID 100

Non-RAID drive architectures

• 
  JBOD