Network_Appliance
NS0-157 · Question #166
NS0-157 Question #166: Real Exam Question with Answer & Explanation
The correct answer is D: Asymmetric Logical Unit Access. Clustered Data ONTAP 8.1 SAN requires Asymmetric Logical Unit Access (ALUA) on both the host initiator and the storage target to handle multiple paths with varying priorities.
Network Configuration and Data Access
Question
To operate DATA ONTAP 8.1 Cluster Mode SAN, what must be configured on both the initiator and the target?
Options
- ALogical Unit Access Initialization
- BPhysical Unit Access Initialization
- CSymmetric Logical Unit Access
- DAsymmetric Logical Unit Access
- ESAN Access Initialization Protocol
Explanation
Clustered Data ONTAP 8.1 SAN requires Asymmetric Logical Unit Access (ALUA) on both the host initiator and the storage target to handle multiple paths with varying priorities.
Common mistakes.
- A. Logical Unit Access Initialization is not a defined SAN protocol or configuration standard; it does not exist in the iSCSI, FC, or FCoE specification sets.
- B. Physical Unit Access Initialization is not a real SAN configuration term and does not correspond to any protocol used in Data ONTAP SAN environments.
- C. Symmetric Logical Unit Access (SLUA) treats all paths as equal priority, which is incompatible with Cluster Mode where paths have different access characteristics depending on LUN ownership.
- E. SAN Access Initialization Protocol is a fabricated term that does not correspond to any real SAN standard or ONTAP configuration requirement.
Concept tested. ALUA configuration for Cluster Mode SAN
Reference. https://docs.netapp.com/ontap-9/topic/com.netapp.doc.cdot-famg-san/GUID-alua-config.html
Topics
#SAN#ALUA#iSCSI initiator#LUN access
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