While the term RAID (redundant array of inexpensive disks or redundant array of independent disks) was first coined in 1987, the technologies comprising the original five levels of RAID were used in the years prior. The exact features and functionality of RAID have evolved over the years, and, due to the increasing affordability and accessibility of technology in general, RAID is becoming more popular amongst professionals and personal users alike.
Implementing RAID on Your Computer
Although it's not recommended for beginners, the process of installing and implementing RAID on a computer is a rather straightforward process. Start by procuring the necessary hardware:
The actual installation process varies, depending on whether or not you're using a RAID controller or a RAID adapter. Once installed, you can begin to configure the RAID system to meet your needs.
Standard RAID Levels
While there were originally five different levels of RAID implementation, these levels have evolved to include nested levels in some cases. There are also numerous non-standard RAID levels, many of which are proprietary.
In modern computing, the standard RAID levels include:
As mentioned, there are additional RAID levels, too. Numerous non-standard levels exist, all of which are used in highly specialized cases, and some organizations have developed their own, proprietary RAID implementations to meet their unique needs.
You may read more about RAIDs in the article in Wikipedia: RAID.