A small business needs to incorporate fault tolerance into their infrastructure to increase data
availability. Which of the following options would be the BEST solution at a minimal cost?
A.
Clustering
B.
Mirrored server
C.
RAID
D.
Tape backup
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Key words: Fault tolerance for data availability. So we need to meet two criteria at the same time: REDUNDANCY & AVAILABILITY.
A- Clustering does not necesarily provide data redundancy. It is however used for AVAILABILITY.
B- A mirrored server takes care of just one server. It does not say what type of server either, or whether is a data server or not
D- Tape Backup. A backup can be used for restore but it does not provide REDUNDANCY. It provides RECOVERY
So C- RAID is the best option as it can be implemented on ALL servers in order to provide both REDUNDANCY & AVAILABILITY of data.
RAID, or redundant array of independent disks (RAID). RAID allows your existing servers to have more than one hard drive so that if the main hard drive fails, the system keeps functioning. RAID can achieve fault tolerance using software which can be done using the existing hardware and software.
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