RAID, which stands for Redundant Array of Independent Disks, is a technology that combines multiple physical hard drives into a single logical unit to improve data reliability and performance. There are different RAID levels commonly used:
1. RAID 0 (Striping):
– Description: Splits data evenly across multiple disks for improved performance but no redundancy.
– Use cases: Often used in environments where performance is crucial but data redundancy is not a concern.

2. RAID 1 (Mirroring):
– Description: Duplicates data across multiple disks for data redundancy.
– Use cases: Used in environments where data reliability is critical.
3. RAID 5 (Striping with Parity):
Description: Distributes data and parity information across multiple disks for a balance of performance and data protection.
– Use cases: Commonly used in file and application servers.
4. RAID 6 (Striping with Double Parity):
– Description: Extends RAID 5 by using two parity blocks for increased fault tolerance.
– Use cases: Used in environments where high data availability and fault tolerance are critical.

5. RAID 10 (RAID 1+0 or Mirrored Striping):
– Description: Combines mirroring and striping for both redundancy and improved performance.
– Use cases: Ideal for environments that require both high performance and high fault tolerance.