You work as a System Administrator for company Inc. The company has a Windows 2008 based
network environment. There are twenty client computers running Windows 7 and three servers
running Windows Server 2008 R2. You have to ensure that customer service representatives can
access the client’s information whenever they need. For this, you want to configure a RAID 5 solution
in Network Attached Storage (NAS). How many minimum hard drives can you use?

A.
5

B.
6

C.
4

D.
3

Explanation:
RAID-5 supports striped-with-parity. It contains a minimum of three disks. In this disk system, data
along with its parity bits is stored across multiple disks. When a file is written to a RAID-5 volume,
the file splits to all the disks in the set excluding the final disk. The final disk contains the parity
information. This parity information allows the disks in the array to keep functioning, in case a disk in
the set fails. Due to data redundancy, RAID-5 provides fault tolerance.