Multiple choice technology architecture

What is the advantage of RAID 5 over RAID 1 ?

  1. Improved write performance

  2. The need for fewer drives to provide fault tolerance

  3. A higher level of redundancy

  4. Better performance in the event of a drive failure
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B Correct answer
Explanation

RAID 5 needs at least 3 disks but uses only 1 disk's worth for parity, making it more storage-efficient than RAID 1 which requires 50% overhead for mirroring. RAID 5 has worse write performance than RAID 1 and similar redundancy levels.

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