Question

question 6 of 15
what is an advantage of raid 5 over raid 1?
raid 5 improves performance over raid 1.
raid 5 provides redundancy for the disk controller.
raid 5 continues to operate with a failure in two disks. raid 1 can only operate with a failure of one disk.
raid 5 provides redundancy; raid 1 does not.
i want to review this question later. (optional)
check my answer (optional)

Explanation:

• RAID 1 uses mirroring, which writes identical data to two disks, offering good read performance but high write overhead. RAID 5 uses block-level striping with distributed parity, which balances read/write performance better than RAID 1, especially for read-heavy workloads, and uses disk space more efficiently for redundancy.
• RAID 5 does not provide disk controller redundancy; that is not a feature of either RAID level here.
• Both RAID 5 and RAID 1 can only tolerate a single disk failure; RAID 5 fails if two disks fail.
• Both RAID 1 and RAID 5 provide data redundancy, so the claim that RAID 1 does not is false.

Answer:

A. RAID 5 improves performance over RAID 1.