RAID is a disk technology described as data written across multiple disks to tolerate a disk failure. Which option best describes RAID?

RAID is a disk technology described as data written across multiple disks to tolerate a disk failure. Which option best describes RAID?

• A. RAID0
• B. Backups
• C. JBOD
• D. RAID

Answer: (D)

This is testing the idea that RAID uses multiple disks to tolerate a failure by distributing data across them. The description given—data written across multiple disks to survive a disk failure—fits the purpose of a RAID setup, which is to provide redundancy and fault tolerance within a disk array. Among the options, the one that best matches this concept is RAID itself, since it represents the overall approach to creating a fault-tolerant disk system. RAID0, while it spreads data across disks to improve performance, offers no redundancy and cannot tolerate a disk failure. JBOD presents disks as separate units and does not form a unified fault-tolerant array. Backups are a separate practice of preserving copies of data, not the fault-tolerant arrangement within an array.

This is testing the idea that RAID uses multiple disks to tolerate a failure by distributing data across them. The description given—data written across multiple disks to survive a disk failure—fits the purpose of a RAID setup, which is to provide redundancy and fault tolerance within a disk array. Among the options, the one that best matches this concept is RAID itself, since it represents the overall approach to creating a fault-tolerant disk system.

RAID0, while it spreads data across disks to improve performance, offers no redundancy and cannot tolerate a disk failure. JBOD presents disks as separate units and does not form a unified fault-tolerant array. Backups are a separate practice of preserving copies of data, not the fault-tolerant arrangement within an array.