Authentic Netapp Certification Exam NS0-162 Questions Answers

 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 ONTAP Select is a software-only version of ONTAP that can run on commodity servers with direct-attached storage. It supports both block and file protocols, including NFS, NVMe, and CIFS. SCSI and FCP are not supported by ONTAP Select. References :- ONTAP Select overview, Client protocols, Software-Defined Storage with ONTAP Select

NVMe is a protocol that enables fast and efficient access to storage devices over a network. NVMe uses NVM Express over Fabrics (NVMe-oF) to transport commands and data between hosts and storage systems. NVMe-oF uses NVM subsystems, which are logical containers for one or more NVMe namespaces. A namespace is a logical unit of storage that can be accessed by a host. A host can discover and connect to an NVM subsystem by using a unique NVM subsystem identifier (NQN). ONTAP supports NVMe/FC and NVMe/RoCE as the transport protocols for NVMe-oF. ONTAP maps NVMe namespaces to LUNs and NQNs to subsystems. ONTAP also maps initiator groups to subsystems to control host access to namespaces. References :- NVMe Overview, Implementing and Configuring Modern SANs with NVMe/FC, NVMe-oF host configuration for RHEL 8.9 with ONTAP