Which two operations are performed on Hitachi Dynamic Tiering (HDT) pools using Hitachi Device Manager? (Choose two.)

Question

Options

• ACreate an HDT pool.
• BExpand an HDT pool.
• CSplit an HDT pool.
• DReallocate an HDT pool.

• A
  91% (58)
• C
  3% (2)
• D
  6% (4)

Explanation

Hitachi Device Manager (HDvM) supports the full lifecycle management of HDT pools, which includes both creating (A) and expanding (B) them - these are the two core administrative operations exposed through the HDvM GUI and CLI for HDT pool management.

Why the distractors are wrong:

• C (Split): HDT pools cannot be split. Pool splitting is not a supported operation in HDT - data tiers are managed internally by the storage system's tiering policy, not by dividing pools.
• D (Reallocate): While HDT performs automatic tier reallocation internally based on I/O patterns, this is an autonomous background process driven by the VSP controller - it is not an operation you manually trigger through HDvM as a named pool operation.

Memory tip: Think "Create and Grow" - HDvM lets you bring an HDT pool to life and make it bigger, but everything else (rebalancing tiers, relocating data) happens automatically inside the array. If an option sounds like something the storage system does on its own, it's not a manual HDvM pool operation.

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