Which two statements are correct when adding cache to a VSP One B24? (Choose two.)

Question

Options

• ACMG0 and CMG1 must use the same DIMM type
• BCache modules must be installed in CMG1
• CCache Modules must be installed on the CM board
• DThis is a disruptive procedure that cannot be performed online.

• A
  86% (24)
• B
  4% (1)
• D
  11% (3)

Explanation

On the VSP One B24, cache modules physically reside on the CM (Cache Memory) board - not in a general-purpose slot - making C correct. Because the system splits cache across two Cache Memory Groups (CMG0 and CMG1) that must mirror each other for balanced performance and compatibility, A is also correct: both CMGs must be populated with the same DIMM type to avoid instability or mismatch errors.

Why B is wrong: Cache is not restricted to CMG1; modules can (and typically should) be installed across both CMG0 and CMG1 symmetrically, not in just one group.

Why D is wrong: Adding cache to the VSP One B24 is a non-disruptive, online procedure - a key selling point of enterprise Hitachi storage - so no downtime is required.

Memory tip: Think "Same and CM" - cache must go on the CM board (C), and both CMGs must use the same DIMM type (A). If an answer says "only CMG1" or "must take it offline," it's a trap targeting those who confuse VSP One rules with older, more restrictive platforms.

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