Pass the Netapp Certified Data Administrator (NCDA) NS0-162 Questions and answers with ExamsMirror

 To troubleshoot the issue of iSCSI LUNs not visible on the host, you should verify that the iSCSI data protocol has been enabled on the ports and that the controller has not been taken over. If the iSCSI data protocol is disabled on the ports, the storage system will not accept iSCSI connections or requests over those ports. If the controller has been taken over by its partner, the iSCSI LUNs on the taken-over node will not be available to the host. You can use the vserver iscsi connection show command to check the status of the iSCSI connections and the storage failover show command to check the status of the controller. References :- Troubleshoot iSCSI LUNs not visible on the host, vserver iscsi connection show, storage failover show

 NetApp’s All SAN Array (ASA) is a dedicated SAN-only solution that provides high performance and availability for mission-critical applications. ASA supports up to 2-node clusters, which can be either HA pairs or MetroCluster configurations. ASA does not support single node, 12-node, or 24-node clusters, as these are reserved for ONTAP systems that support both SAN and NAS protocols. References :- All-Flash SAN Array (ASA) A-Series Systems, All-Flash SAN Array software configuration overview, ASA system does not report as SAN optimized

https://docs.netapp.com/us-en/ontap/data-protection/convert-mode-snapmirror-synchronous-task.html On the link above it states: You cannot modify the policy of a Snapmirror Synchronous relationship to convert its mode.

When a LUN has space reservations disabled (a non-space-reserved LUN), and its containing volume has no space guarantee, ONTAP reports the volume usage based on the actual data written to the LUN, not the LUN size. Therefore, ONTAP reports that the volume is using 10 GB of its containing aggregate, and the volume is 10% full. References :- Understanding space reservations for LUNs in System Manager, Recommended volume and file or LUN configuration combinations overview

The problem of being unable to upload large files or migrate VMs to the new NFS datastore is likely caused by a mismatch in the maximum transmission unit (MTU) settings between the network switches, the ONTAP cluster, and the vSphere hosts. The exhibit shows that the broadcast domain for the NFS LIF has an MTU of 9,000 bytes, which means that it is configured for jumbo frames. However, the default MTU for the VMkernel ports on the vSphere hosts is 1,500 bytes, which means that they are not configured for jumbo frames. This can result in packet fragmentation, dropped packets, or reduced performance. To correct the problem, the MTU of the VMkernel ports on the vSphere hosts should be changed to 9,000 bytes to match the MTU of the broadcast domain and the network switches. This will enable the vSphere hosts to send and receive jumbo frames and improve the NFS performance. References :- ProvisionNFS storage for VMware datastores, vSphere NFS datastore - Version 3 with ONTAP, Configure jumbo frames for VMkernel networking

The space allocation option is a LUN attribute that enables the host to communicate with the storage system about the blocks that are no longer in use by the host file system. When the space allocation option is enabled, the host sends SCSI UNMAP commands to the storage system when files are deleted on the disk. The storage system then reclaims the space from the thin-provisioned LUN and makes it available for other LUNs or volumes. This process is also known as space reclamation or hole punching. If the space allocation option is disabled, the host does not send SCSI UNMAP commands and the storage system does not reclaim the space from the thin-provisioned LUN, resulting in a discrepancy between the host and the storage system. References :- Space reclamation, Enable or disable the space allocation option for a LUN

To protect the data on your ONTAP C190 cluster using the native SnapMirror technology, you need to have two products that support SnapMirror replication and can run ONTAP software. The following two products would satisfy this request:

ONTAP Select: This is a software-defined storage solution that runs on VMware ESXi hosts and can create and manage ONTAP clusters and nodes on the virtualized hardware. ONTAP Select supports SnapMirror replication for data protection and disaster recovery between ONTAP Select clusters or between ONTAP Select and other ONTAP systems12.

Cloud Volumes ONTAP: This is a software-only storage service that runs on public cloud platforms such as AWS, Azure, and Google Cloud and provides enterprise-grade data management features such as SnapMirror replication. Cloud Volumes ONTAP supports SnapMirror replication for data protection and disaster recovery between Cloud Volumes ONTAP instances or between Cloud Volumes ONTAP and other ONTAP systems34.

Cloud Volumes Service for AWS and Azure NetApp Files are not the products that can satisfy this request, as they are fully managed cloud storage services that do not run ONTAP softwareand do not support SnapMirror replication. They provide native cloud replication features such as AWS Backup and Azure Backup, which are different from SnapMirror technology56. References :- ONTAP Select overview, SnapMirror replication for ONTAP Select, Cloud Volumes ONTAP overview, SnapMirror replication for Cloud Volumes ONTAP, Cloud Volumes Service for AWS overview, Azure NetApp Files overview.

 The number of ISCSI LIFs that will be created from the SVM setup wizard, as shown in the exhibit, is 16. This is because the LIFs per node field is set to 2, and there are 4 nodes in the cluster. Therefore, the total number of LIFs is 2 x 4 8 for each SVM, and since there are two SVMs, the total number of LIFs is 8 x 2 16. The other options are incorrect because they do not match the calculation based on the exhibit. References :- Configure an SVM for iSCSI, Configure iSCSI on an existing SVM

The easiest and fastest way to restore a single file from a Snapshot copy is to use the Windows Shadow Copy Client, which allows the user to access and restore Data ONTAP Snapshot files from the Previous Versions tab in the Properties menu. This does not require any CLI commands or ONTAP System Manager operations. References :- Restoring files from Snapshot copies, Restore a single file from a Snapshot copy

When you set up an ONTAP cluster, the cluster setup process automatically creates the admin SVM and the node SVMs for the cluster. The admin SVM represents the cluster and provides cluster-wide management services. The node SVMs represent the individual nodes of the cluster and provide node-specific management services. The data SVMs and the cluster SVMs are not automatically created, but can be created manually or by using the System Manager GUI. The data SVMs provide data access to the clients and applications using various protocols. The cluster SVMs provide intercluster communication and data replication between clusters12. References :- Types of SVMs, ONTAP - Types of SVMs