What is a RAID storage system?
The definition of RAID is in the name of the system itself. Standing for Redundant Array of Independent Disks, RAID literally means redundant bundling of independent disks – a cluster of multiple hard drives to get a single logical partition. Depending on the purpose, RAID increases the performance of accessing and writing data, while improving the security of the information.
RAID is a technology that supports the use of 2 or more hard drives in various configurations for the purposes of achieving greater performance, reliability and larger volume sizes through the use of consolidating disk resources and parity calculations.
A number of standard configurations were designed which are referred to as levels. There were five RAID levels originally created, but many more variations have evolved, notably several nested levels and many non-standard levels (mostly proprietary).
So, what do the RAID levels mean? The numbers simply refer to the configuration of the RAID. Knowing that all RAID systems store data efficiently, the choice of system will be based on your own personal needs. The RAID 1 for example meets the needs of performance and reliability. The RAID 5 is a good choice if you are looking for both performance and fault tolerance.