RAID Levels for Disk Redundancy

A cybersecurity administrator needs to add disk redundancy for a critical server.

The solution must have a two-drive failure for better fault tolerance.

Which of the following RAID levels should the administrator select?

A.

0

B.

1

C.

5

D.

6

D.

The correct RAID level for the scenario described would be RAID 6.

RAID stands for Redundant Array of Independent Disks, and it is a technology used to provide data redundancy and fault tolerance. RAID levels refer to the different configurations of disks and data striping, and each level has different characteristics in terms of performance, capacity, and fault tolerance.

RAID 0 is not a viable option because it does not provide any redundancy or fault tolerance. In RAID 0, data is striped across multiple disks, which can increase performance but also means that the failure of any one disk results in the loss of all data.

RAID 1, also known as disk mirroring, involves two disks, with one disk being an exact copy of the other. If one disk fails, the other disk can still function normally. However, RAID 1 does not provide any additional protection beyond a single disk failure.

RAID 5 involves at least three disks, with data and parity information distributed across all disks. If one disk fails, the parity information can be used to reconstruct the missing data. However, if two disks fail simultaneously, the data may be lost.

RAID 6 is similar to RAID 5, but it uses two sets of parity information instead of one. This means that it can tolerate the failure of up to two disks without losing any data. Therefore, RAID 6 is the best option for the scenario described because it provides the required level of fault tolerance with two-drive failure.