CompTIA
CAS-002 · Question #108
CAS-002 Question #108: Real Exam Question with Answer & Explanation
The correct answer is D: Install a dual port HBA in the server; create a LUN on the SAN, and enable LUN masking. A dual-port HBA provides redundant storage paths for availability, and LUN masking on the SAN restricts which server HBAs can access each LUN for access control.
Question
An administrator would like to connect a server to a SAN. Which of the following processes would BEST allow for availability and access control?
Options
- AInstall a dual port HBA on the SAN, create a LUN on the server, and enable deduplication
- BInstall a multipath LUN on the server with deduplication, and enable LUN masking on the
- CInstall 2 LUNs on the server, cluster HBAs on the SAN, and enable multipath and data
- DInstall a dual port HBA in the server; create a LUN on the SAN, and enable LUN masking
Explanation
A dual-port HBA provides redundant storage paths for availability, and LUN masking on the SAN restricts which server HBAs can access each LUN for access control.
Common mistakes.
- A. Creating the LUN on the SAN itself (not on the server) is incorrect architecture for a SAN deployment, and deduplication is a storage efficiency feature that has no relevance to availability or access control.
- B. A multipath LUN on the server is architecturally incorrect; multipath I/O is a host-level driver configuration for using multiple HBA paths, not a LUN type, and deduplication does not address access control.
- C. Clustering HBAs is not a standard SAN configuration concept, and the described combination lacks explicit LUN masking - the specific access control mechanism required by the question.
Concept tested. SAN dual-port HBA redundancy and LUN masking access control
Reference. https://docs.netapp.com/us-en/ontap/san-admin/lun-masking-concept.html
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