What are the different RAID levels?
A research group at UC-Berkeley coined the term “RAID”, defining six RAID levels. Each level is a different way to spread data across multiple drives–a compromise between cost and speed. Understanding these levels is important, because each level is optimized for a different use. RAID Level 0 RAID Level 0 is not redundant, hence does not truly fit the “RAID” acronym. In level 0, data is split across drives, resulting in higher data throughput. Since no redundant information is stored, performance is very good, but the failure of any disk in the array results in data loss. This level is commonly referred to as striping. RAID Level 1 RAID Level 1 provides redundancy by duplicating all data from one drive on another drive. The performance of a level 1 array is only slightly better than a single drive, but if either drive fails, no data is lost. This is a good entry-level redundant system, since only two drives are required; however, since one drive is used to store a duplicate of the dat
A research group at UC-Berkeley coined the term “RAID”, defining six RAID levels. Each level is a different way to spread data across multiple drives–a compromise between cost and speed. Understanding these levels is important, because each level is optimized for a different use. RAID Level 0 RAID Level 0 is not redundant, hence does not truly fit the “RAID” acronym. In level 0, data is split across drives, resulting in higher data throughput. Since no redundant information is stored, performance is very good, but the failure of any disk in the array results in data loss. This level is commonly referred to as striping. RAID Level 1 RAID Level 1 provides redundancy by duplicating all data from one drive on another drive. The performance of a level 1 array is only slightly better than a single drive, but if either drive fails, no data is lost. This is a good entry-level redundant system, since only two drives are required; however, since one drive is used to store a duplicate of the dat
