A customer using a Hitachi Unified Storage system wants to protect their data LUNs from being accidentally unmapped. Which feature should be used?

Question

Options

• ALUN Security
• BMapping Guard
• CData Retention Utility
• DHost Group Security

• A
  7% (2)
• B
  76% (22)
• C
  3% (1)
• D
  14% (4)

Explanation

Mapping Guard is the correct answer because it is a Hitachi Unified Storage feature specifically designed to lock LUN-to-host-group mappings, preventing administrators from accidentally unmapping (removing) LUNs that are in active use by hosts.

Why the distractors are wrong:

• A. LUN Security is not a distinct HUS feature for this purpose - it conflates general access control concepts and doesn't specifically address accidental unmapping.
• C. Data Retention Utility (DRU) is a real Hitachi feature, but it provides WORM (Write Once, Read Many) protection - it prevents data from being modified or deleted, not from being unmapped.
• D. Host Group Security controls which hosts are permitted to access which LUNs (authentication/authorization), but does not guard against an admin removing a LUN mapping.

Memory tip: Think of "Mapping Guard" as a guard standing at the door of the mapping table - it won't let anyone remove a LUN from a host group without explicitly disabling the guard first. The word "Mapping" in the feature name directly signals its purpose: protecting LUN mappings.

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