RAID is an acronym for Redundant Array of Inexpensive Disks. It is a technology that allows computer users to gain a high level of reliable storage space from low-cost PC-class disk-drive components. This is done by arranging devices into arrays for redundancy. It is basically used as a term for computer data storage schemes that can divide and replicate data across different hard disk drives. There are different
schemes for example, RAID 0, RAID 1, etc. Its design generally involves achieving two goals. The first being increasing data reliability and the second, improving the input! output performance. When there are multiple physical disks set up to use RAID technology, they are usually said to be placed in a RAID array. This array thus gives out data across different disks, but the array that is used is seen as a single disk. The best part is that RAID can be used to serve several different purposes.



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