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Difficulty: EasyResilience, High Availability, and Redundancy

An IT administrator is deploying a centralized log server that must remain operational without downtime if an individual hard drive suffers a physical failure. Which of the following technologies should the administrator implement to provide this real-time storage fault tolerance?

  1. Redundant Array of Independent Disks (RAID)Answer
  2. B
    Automated off-site data backups
  3. C
    Round-robin DNS load balancing
  4. D
    Recovery Point Objective (RPO) threshold

Answer

Redundant Array of Independent Disks (RAID) should be implemented because it provides real-time disk redundancy and storage fault tolerance, enabling the system to sustain a hard drive failure without server downtime.
Redundant Array of Independent Disks (RAID) mirrors or stripes data with parity across multiple physical drives. This ensures that if a single drive fails, the system continues functioning without loss of availability or data.

Step-by-Step Solution

1
Identify the system requirement from the scenario
The server requires immediate storage-level fault tolerance to maintain continuous uptime during a single hard drive failure.
Hardware fault tolerance at the storage layer prevents service interruption.
2
Evaluate the technical redundancy controls available
RAID mirrors or stripes data with parity across multiple physical hard drives, allowing the server to operate continuously despite a single disk failure.
RAID directly addresses physical storage media redundancy.

Key Concept

Redundant Array of Independent Disks (RAID) storage fault tolerance
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Topics

Resilience, High Availability, and Redundancy

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