RAID (Redundant Array of Independent Disks) | CISSP |



RAID (Redundant Array of Independent Disks) | CISSP |

RAID (Redundant Array of Independent Disks) is a data storage virtualization technology that combines multiple physical disk drive components into one or more logical units for data redundancy, performance improvement, or both. Key RAID levels include:

RAID 0 (Striping): Splits data across drives, offering high performance but no redundancy.
RAID 1 (Mirroring): Duplicates data on two drives; if one fails, the other has a copy.
RAID 5 (Striping with Parity): Data and parity (error checking) are spread across three or more drives, offering a balance of performance and data protection.
RAID 6 (Striping with Double Parity): Similar to RAID 5, but with additional parity block for even greater fault tolerance.
RAID 10 (1+0): Combines mirroring and striping for high performance and redundancy.
RAID is used in servers and high-end storage systems to increase data reliability and speed.

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