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Which storage type stripes data and includes parity checks for recovery?

  1. RAID 0

  2. RAID 1

  3. RAID 1+0

  4. RAID 5

The correct answer is: RAID 5

RAID 5 is a storage type that combines striping data across multiple disks with parity checks to ensure data integrity and enable recovery in the event of a disk failure. In RAID 5, data is divided into blocks, which are then striped across all the disks in the array. For every set of data blocks written, RAID 5 also calculates a parity block, which contains information that can be used to reconstruct data in case one of the disks fails. This parity information is distributed among the disks rather than being stored on a single disk, which allows for improved read performance and redundancy. If one disk fails, the system can continue to operate in a degraded mode, and data can be reconstructed from the remaining disks using the parity information. In contrast, RAID 0 does not have any redundancy features as it purely focuses on performance through striping data without parity. RAID 1 provides redundancy by mirroring data across two disks, while RAID 1+0 (also known as RAID 10) combines mirroring and striping but does not include parity checks. Therefore, RAID 5 is the only option listed that incorporates both striping and parity checks to provide a balance between performance and data protection.