Your system has two hard disks. You want to increase disk access speed for your web
server, but you do not have money available to buy new I/O cards or new hard drives.
What software-based solution can you implement instead?

A.
RAID 5

B.
RAID 1

C.
Disk duplexing

D.
RAID 4

Explanation:
RAID 1 will provide mirroring, which will provide extra speed and
fault tolerance.
Incorrect Answers:
A: RAID 5 requires at least 3 disks, and we only have two and can’t but a third.
C: Disk duplexing does not provide a performance increase since only one device isused for
reads.
D: RAID4 has not been implemented as a software solution.