You want to create a Hitachi Dynamic Provisioning pool on a VSP using Hitachi Device Manager. Which two conditions apply? (Choose two.)

Question

Options

• ADrive types cannot be mixed.
• BLDEVs must be selected.
• CParity groups must be selected.
• DThe maximum pool number cannot exceed 127.

• A
  5% (1)
• B
  14% (3)
• C
  81% (17)

Explanation

When creating a Hitachi Dynamic Provisioning (HDP) pool via Hitachi Device Manager, you work at the parity group level - you select parity groups to contribute capacity to the pool, which is why C is correct. The pool number constraint on VSP systems caps at 127 (pool IDs 0–127), making D correct as well.

Why the distractors are wrong:

• A is wrong - HDP pools can mix drive types (e.g., SAS and SSD) in certain configurations, particularly with tiered pools; restricting drive mixing is not a hard creation requirement.
• B is wrong - LDEVs are created from the pool after it exists; you do not select pre-existing LDEVs to build the pool. The pool is built from parity groups, not LDEVs.

Memory tip: Think "PG → Pool → LDEV" as the creation chain - Parity Groups feed the Pool, and the Pool produces LDEVs. This reminds you that parity groups (not LDEVs) are what you select at pool creation time. For the 127 limit, remember VSP uses a 7-bit pool ID field (2⁷ − 1 = 127 maximum).

No community discussion yet for this question.