You are concerned about fault tolerance for the database server you manage. You need to ensure that if a single drive fails, the data can be recovered. What RAID level would be used to support this goal while simultaneously distributing parity bits?

A) RAID 0

B) RAID 1

C) RAID 3

D) RAID 5

D. RAID 5

Explanation:

Raid (Redundancy array of inexpensive disk or drives) levels are used to boost performance and reliability of storage devices. They consist of hard drives or solid state drives working parallel to each other.

There are different levels of RAID, they are;

Raid 0, 1, 2, 3, 4, 5 and 10. Raid 2, 3, 4 and 7 are not really is use, so, we pay attention to 0, 1, 5 and 10.

Raid 0 only splits data to not list two drives and are not redundant. Raid 1 mirrors or reflects data on at least two drives and are also not redundant.

Raid 5 is redundant as it share data and parity bits between 16 or more drives.

Unlike Raid 5, Raid 10 does not have parity bits.