What is the primary purpose of LUN masking in a storage environment?

• A. To hide LUNs from certain initiators
• B. To duplicate LUNs
• C. To expand LUN size
• D. To delete LUNs

Answer: (A)

LUN masking controls visibility of storage objects. It determines which initiators (hosts) can see and access specific LUNs on a storage array. By applying masking rules, you present only the LUNs that a given server should access, while keeping others hidden from that server. This enhances security, protects data from unintended access, and simplifies management in environments with multiple servers sharing storage. It doesn’t duplicate data, resize a LUN, or delete a LUN—those actions are separate operations. The core idea is that masking hides or reveals LUNs to selected initiators.