A customer has received a Hitachi Dynamic Provisioning Early Alert warning by e-mail indicating that the default threshold has been reached on a Hitachi Unified Storage (HUS) system. What does this…

Question

Options

• ADP-Vols are provisioned over 200% of the DP pool capacity.
• BDP-Vols have used over 40% of the DP pool capacity.
• CThe HUS has automatically added another free RAID Group to the DP pool.
• DThe HUS has projected that the DP pool will be used up within 24 hours.

• A
  2% (1)
• B
  89% (48)
• C
  4% (2)
• D
  6% (3)

Explanation

Option B is correct because Hitachi Dynamic Provisioning's Early Alert is designed as a proactive warning system, and its default threshold fires when DP-Vols have consumed 40% of the DP pool capacity - giving administrators ample time to expand the pool before it becomes critical.

Why the distractors are wrong:

• A is wrong because 200% relates to the over-provisioning ratio (thin provisioning allows virtual capacity to exceed physical), not an alert threshold value.
• C is wrong because HUS does not automatically add RAID Groups to a DP pool; pool expansion requires administrator action.
• D is wrong because a time-based depletion projection ("will run out within 24 hours") describes a different type of alert - a depletion warning - not the Early Alert.

Memory tip: Think of "Early Alert" as a 40% fuel gauge warning light - it goes off well before you're running low (not at 80–90%), so you have time to act. The word Early is the clue: 40% is early enough to give you breathing room.

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