RAID - Term Description

What is: RAID
 
Description:
A set of two or more hard drives that are used together to increase performance and provide fault tolerance. A RAID includes multiple hard drives and a specialized disk controller than contains the RAID functionality. The 3 most common RAID levels are 0, 3, and 5. Level 0 provides data striping, which involves spreading out blocks of each file across multiple disks to improve performance. Level 3 improves performance and provides some fault tolerance with data striping and a disk that is reserved for storing error correction data. Level 5 improves performance and fault tolerance by providing data striping and stripe error correction information.

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