Which of the following RAID levels does not use parity for data redundancy?

Correct option is A

RAID 0 does not use parity for data redundancy. It provides data striping to enhance performance but offers no fault tolerance or parity protection.
Important Key Points:
1. RAID 0 is focused solely on data striping, which increases performance by splitting data across multiple drives. However, it lacks any form of parity or redundancy, meaning if one drive fails, all data is lost.
2. RAID levels using parity: RAID 3, RAID 4, RAID 5, and RAID 6 use parity to provide redundancy, helping to recover data in case of a disk failure.
Knowledge Booster:
· RAID 3 and RAID 4: Both use dedicated parity disks. RAID 3 uses byte-level striping with parity, while RAID 4 uses block-level striping with a dedicated parity disk.
· RAID 5: Uses distributed parity, meaning parity information is spread across all drives. This allows for single disk failure without data loss.
· RAID 6: Extends RAID 5 by adding an additional parity block, which allows it to tolerate up to two simultaneous drive failures.
· RAID 0: Unlike the other RAID levels, RAID 0 has no redundancy; it is used purely for performance improvements by distributing data across drives without any parity.