Many few people might have understood what RAID actually is. If you are technical and have worked on storage devices, then you might have come across the word RAID. It stands for Redundant Array of Independent Disks. It is a storage device which replicates data stored in it in multiple drives. Back in traditional days, when the computer was just on the verge of rising, Hard Drives were of less capacity and cost was very high then. It was at time RAID was invented to combine various data drives into a single one. This increased the capacity and also the device became faster in speed.

Redundancy is a technical term which means replicating content. RAID follows the same thing which is really very beneficial for businesses, whether it is a small or big, as data loss is more prone to take place. With the help of redundancy, kind of backup is created and under a situation of data loss, the copied similar data can be retrieved and used. There are various levels of RAID technology, let us combine the small bits and present it to you in a systematized format.

1.RAID 0

RAID 0 is one of the levels of the technology we are going through now. This is one of the most efficient storage levels as the data stored in it does not make any redundancy and the data lost through this level can never be recovered. But the loss, in turn, is for something good. In this RAID 0,’ it distributes data across multiple drives which are known as striping. Striping leads to increased read and writes speeds.

2.RAID 1

This technology of RAID requires redundancy of minimum of two drives. More can be replicated. This level has an increased speed to RAID 0. This drive applies the technique to replicate two drives with the same information and this process is known as mirroring. This is one of the most common technologies used by many.

3.RAID 2

RAID 2 is such a technology which is only theoretically seen and has never been in practice.

4.RAID 3

Similar to RAID 2 technology, RAID 3 is also hypothetical and has never been commercially used. But, if we consider it practically even, it is superior to RAID 2 technology.

5.RAID 4

RAID 4 and RAID 5 are almost similar technologies, we will be discussing RAID 4 later in this section. No drive is dependent upon each other and they act independently.

6.RAID 5

The unique feature which actually makes RAID 5 different from all others is that it has a smooth write operation which is performed.

7.Nested RAID

Nested word itself makes it clear of the technology that, it is a combination of two or more terminologies. The most popular ones are RAID 10, RAID 100 and RAID 50.

Though there are several RAID technologies available, there is always a chance for data loss. RAID data if lost, is difficult to recover. Proper professional team or person need to take care of it recover the data and prevent permanent loss.