What is RAID 5 and its features, advantage and disadvantage?

RAID Level 5: Some commonly used RAID Level 5 is a cluster-level implementation of data striping with DISTRIBUTED parity for enhanced performance. Clusters can vary in size and are user-definable but they are typically blocks of 64 thousand bytes. The clusters and parity are evenly distributed across multiple hard drives and this provides better performance than using a single drive for parity. Out of an array with “N” number of drives, the total capacity is equal to the sum of “N-1? hard drives. For example, an array with 4 equal sized hard drives will have the combined capacity of 3 hard drives. This is the most common implementation of data striping with parity. In this example 25% of the storage purchased is used for duplication. Controller Requirements: Requires a moderately high-end card for hardware RAID, supported by some operating systems for software RAID, but at a substantial performance penalty. Hard … Continue reading