Where do Dynamic Pools obtain spare space for rebuilds?

Question

Options

• ASpare extents are striped across pool drives.
• BUnprovisioned free space is used from the pool.
• CUnused drives act as dedicated hot spares.
• DDedicated hot spare drives are reserved from a pool.

• A
  88% (36)
• B
  2% (1)
• C
  2% (1)
• D
  7% (3)

Explanation

Dynamic Pools distribute spare capacity as spare extents striped across all drives in the pool rather than reserving entire drives for that purpose - this enables parallel rebuilds that are significantly faster because multiple drives contribute simultaneously to the rebuild process.

Why the distractors are wrong:

• B is wrong because "unprovisioned free space" refers to capacity not yet allocated to volumes, which is distinct from the pre-allocated spare extents that Dynamic Pools specifically reserve for rebuild operations.
• C is wrong because unused dedicated hot spares are the traditional approach - Dynamic Pools were designed specifically to eliminate idle spare drives sitting unused.
• D is wrong for the same reason as C; reserving whole dedicated hot spare drives from a pool is the Classic Pool / traditional model, not the Dynamic Pool model.

Memory tip: Think "Dynamic = Distributed" - Dynamic Pools dynamically stripe spare extents across drives (no single drive is wasted as a spare), whereas traditional pools keep a dedicated spare drive sitting idle. If the answer mentions a whole drive being reserved, it's describing the old way.

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