Pass the Netapp NCSIE ONTAP NS0-185 Questions and answers with Dumpstech

This scenario is about iSCSI SAN path visibility after cluster expansion. ONTAP usesSelective LUN Map (SLM)concepts so that hosts do not automatically see every LUN through every node, which would create unnecessary paths. ONTAP documentation explains that with SLM, when a LUN map is created, the LUN is accessible through paths on the node that owns the LUN and its HA partner, and this behavior is controlled through thereporting-nodeslist.

If you wantadditional paths(including non-optimized paths) from newly added nodes, you must ensure the new nodes can be included in the reporting scope for those LUN mappings. ONTAP provides an explicit mechanism for this: the lun mapping add-reporting-nodes command is used before or after data mobility events to add nodes to the reporting-nodes list for a LUN mapping. This directly matches optionC (reporting nodes).

However, even if reporting-nodes is expanded, hosts only gain usable iSCSI access if the target LIFs are reachable/allowed. ONTAP documentation describes thatportsetscan be used with SLM to further restrict access, and when using SLM with portsets, LUNs are accessible on the set of LIFs included in the portset (on the owning node and its HA partner). Therefore, to “allow non-optimized paths from the AFF A250 nodes,” you must verify whether portsets are being used and that the appropriate new iSCSI LIFs are included (or that no restrictive portset blocks them). That makes optionA (port sets)the second correct configuration item.

Option B (switch zoning) applies to FC fabrics, not iSCSI. Option D (failover groups) affects NAS/management LIF failover behavior and does not control SAN LUN reporting visibility in the way SLM/reporting-nodes and portsets do.

During post-installation and handover, NetApp provides diagnostic and guidance tools through the support dashboard. Two critical widgets used to identify and resolve issues areGuide MeandActive IQ.

Guide Meprovides step-by-step workflows, recommended actions, and guided troubleshooting based on system state. It helps administrators follow NetApp best practices during deployment, validation, and issue resolution.

Active IQdelivers proactive analytics, risk detection, configuration validation, and health insights. It identifies potential issues before they impact operations and provides corrective recommendations.

Contracts and Warranties is administrative, and ASE Corner is informational, not operational.

Thus, the correct answers areA and B.

Explanation (250–350 words):

ONTAP clusters support amaximum of 24 nodesper cluster. In this scenario, the cluster already hassix nodesrunning mixed NAS (NFS) and SAN (FCP) workloads. When expanding an ONTAP cluster, NetApp best practices and installation rules strongly recommend adding nodesin HA pairsto maintain balanced high availability, performance symmetry, and consistent failover behavior.

Because nodes must be added in pairs, the cluster can scale from six nodes to eight, ten, twelve, and so on, up to the 24-node limit. However, the question is asking how many nodeswould be added, not the maximum supported. The standard NetApp expansion model for a six-node cluster is to addanother three HA pairs, which equalssix additional nodes, bringing the cluster to twelve nodes.

Adding only two or four nodes would result in uneven scaling and is not the standard recommended growth pattern for clusters of this size. Adding eighteen nodes would exceed practical expansion planning for a six-node system and approach the cluster maximum without justification.

Therefore, the correct answer is6.

iSCSI usesIQNs (iSCSI Qualified Names)to identify initiators. When mapping LUNs for iSCSI access, ONTAP requires the initiator IQNs to create igroups and establish access control. WWNNs and WWPNs are used for Fibre Channel, not iSCSI.

Therefore, IQNs are required.

AFF systems are all-flash platforms that rely heavily onsoftware-based efficiency technologiesbuilt into ONTAP. Two such technologies areFlexClone volumesandthin provisioning.

FlexCloneenables instant, space-efficient copies of volumes or files without duplicating data blocks. This is especially useful for testing, development, backups, and rapid provisioning scenarios. On AFF systems, FlexClone operations are nearly instantaneous and incur minimal overhead.

Thin provisioningallows logical storage to be allocated without immediately consuming physical capacity. This ensures maximum utilization of flash storage and prevents over-provisioning, which is critical in all-flash environments.

Flash Pool and FlashCache are hybrid-storage technologies and are not applicable to AFF A400 systems, which do not use HDDs or PCIe read-cache modules.

Therefore, the correct answers areB and D.

ONTAP 9.x defaults toRAID-DPfor SATA, NL-SAS, SAS, and SSD aggregates unless specific conditions require RAID-TEC. RAID-DP provides double-parity protection, allowing the system to withstand two simultaneous disk failures, which is essential for large-capacity SATA drives such as 10 TB disks.

RAID-TEC is reserved for very large aggregates with higher disk counts and is not the default. RAID4 and RAID1 are not used as default aggregate RAID types in ONTAP 9.

Therefore, the aggregate will be created withRAID-DP.

AFF A250 systems use aconverged networking design, where the same physical ports are used for bothcluster interconnect traffic and HA interconnect traffic. This differs from older platforms that used dedicated HA interconnect ports.

The NetApp CN1610 switches only support10GbE, which is insufficient for AFF A250 systems. AFF A250 platforms require25GbE-capable cluster switchesto support both cluster and HA interconnect traffic.

Because the cluster ports are operational, the nodes can join the cluster. However, the HA interconnect traffic cannot be established due to insufficient switch capability, which explains why the NVRAM log cannot synchronize and the HA partner is unreachable.

Therefore:

The AFF A250requires switches with 25GbE port support

The AFF A250uses the same ports for cluster and HA interconnect

Statements involving 40GbE or separate HA ports are incorrect.

The correct answers areC and D.

When VLAN tagging is used, data LIFs are created on VLAN interfaces, not physical ports. Because multimode LACP is configured on port a0a, the correct VLAN interface is a0a-100.