Consider a storage array with two LUNs that store data for the engineering and marketing
departments One LUN is masked to the engineering department; the second LUN is masked to
the marketing department.
What is a benefit of this architecture?

A.
Both departments can access all the data

B.
Both departments can replicate all the data

C.
Data availability and performance is increased

D.
Risk to data integrity and security is reduced

Explanation:
LUN Masking
LUN masking is a process that provides data access control by defining which LUNs a host can
access. The LUN masking function is implemented on the storage array. This ensures that volume
access by hosts is controlled appropriately, preventing unauthorized or accidental use in a shared
environment.
For example, consider a storage array with two LUNs that store data of the sales and finance
departments. Without LUN masking, both departments can easily see and modify each other’s
data, posing a high risk to data integrity and security. With LUN masking, LUNs are accessible
only to the designated hosts.
EMC E10-001 Student Resource Guide. Module 4: Intelligent Storage System