RAID level 5 refers to Block interleaved distributed parity. It partitions both the data and parity among N+1 disks.

RAID level 2 refers to Memory style error correcting code. Memory systems have long parity bits for error detection and correction.

Data striping by splitting bits across multiple disks is called as bit level striping. For example if we have an array of 8 disks, we write bit I of each byte to disk i.

RAID level 0 refers to Disk arrays with striping at the level of blocks. This level does not have any redundancy.

The full form of RAID is Redundant array of Independent Disks. This disk organization technique improves performance and reliability.

There exist a total of 7 RAID levels ranging from 0 to 6.

Using RAID enables us to use multiple disks which when combined together increase the mean time to failure.

Monetary cost, I/O requirements, performance when disk has failed are to be taken into consideration while choosing a RAID level.

The simplest technique to introduce redundancy is to duplicate every disk. This process is known as Mirroring.

RAID level 1 refers to Disk mirroring with block striping. This is also called as RAID 10 or RAID 1+0.