Which three GUI options in the Hitachi Command Suite would be used to optimize data placement within an HDT implementation? (Choose three.)

Question

Options

• AEdit Dedupe Policy
• BEdit Tiering Policy
• CMigrate Data
• DArchive Data
• EExpand DP Volume

• A
  8% (4)
• B
  80% (41)
• D
  12% (6)

Explanation

In Hitachi Dynamic Tiering (HDT), optimizing data placement requires controlling how data moves between tiers, when it moves, and where capacity exists - which is exactly what Edit Tiering Policy (B), Migrate Data (C), and Expand DP Volume (E) address together. Edit Tiering Policy lets you define the rules governing automatic tier promotion/demotion (e.g., I/O thresholds, relocation cycles), Migrate Data allows you to manually trigger or control data movement between tiers, and Expand DP Volume increases pool capacity so there is room to actually relocate data across tiers.

Edit Dedupe Policy (A) is wrong because deduplication reduces redundant data blocks but does not control tiering decisions or data placement across HDT tiers - it's a separate feature. Archive Data (D) is wrong because archiving moves data out of the active storage system for long-term retention, which is data lifecycle management, not intra-HDT tier optimization.

Memory tip: Think "Policy → Move → Room" - you need the policy to define rules (B), the migrate action to execute movement (C), and expanded volume to create room for relocation (E). Dedupe and Archive both deal with eliminating or offloading data, not placing it optimally within tiers.

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