Discussion
Assertion (A): Thin provisioning requires monitoring of the underlying pool.
Reason (R): The sum of the provisioned volumes may exceed the physical capacity available.
Answer: D
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason is why the monitoring is necessary. Because allocation follows writing, the provisioned total may far exceed the physical pool - which is fine until the pool fills. At that point writes fail across every volume drawing on it, not just the one that grew, so the pool must be watched and expanded ahead of demand rather than in response to it.
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