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The choice of RAID 5 is correct because this configuration employs both striping and parity to provide fault tolerance and improved performance. In RAID 5, data is split into blocks and distributed across multiple disks, allowing for faster read and write operations since multiple disks can be accessed simultaneously. In addition to this striping, RAID 5 uses parity data, which is distributed across all the disks. This parity information enables the array to reconstruct lost data in the event of a disk failure, thus safeguarding the integrity of the data stored in the array.
This combination of striping and parity makes RAID 5 effective for environments where both speed and data redundancy are important, allowing organizations to benefit from enhanced performance without sacrificing security. The ability to tolerate a single drive failure while still being functional differentiates RAID 5 within the broader context of RAID levels.
Other RAID configurations have different mechanisms that do not involve the dual functionality of striping with parity in the same way, making RAID 5 unique in its capability and application.