Which of following failures happened, the service will be not interupted for high-end flash storage?

Question

Options

• AOne engine fails (multiple engines).
• BOnly one controller is avallable
• C2 disks fail in a storage pool.
• DTwo controllers fail at the same time (more than two controllers).

• A
  73% (22)
• B
  27% (8)

Explanation

High-end flash storage systems are engineered with layered redundancy so that most single or even multiple component failures do not halt service. A is correct because when multiple engines exist, one engine failing still leaves the remaining engines to handle I/O without interruption. C is correct because enterprise flash storage pools use RAID or erasure coding that tolerates at least two simultaneous disk failures, keeping data accessible. D is correct because if a system has more than two controllers, losing two still leaves functioning controllers to serve requests.

B is the distractor because "only one controller available" describes a state where the system has been reduced to a single point of failure with no remaining redundancy; at that threshold, the architecture can no longer guarantee continuous operation and service is at risk of interruption or the system may enter a protective degraded mode.

Memory tip: The pattern across A, C, and D is that at least one functional redundant unit always remains after the failure. B breaks that pattern by leaving exactly one controller, which eliminates all redundancy and is the tipping point where continuity cannot be guaranteed.

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