Free Netapp NS0-522 Practice Exam with Questions & Answers | Set: 4

Foreign LUN Import (FLI) is ONTAP ' s native block-level migration technology for importing SAN LUN data from an external source array into native ONTAP LUNs. FLI operates at the storage layer rather than requiring host file-copy utilities and supports controlled migration workflows across heterogeneous SAN environments. ONTAP initiator ports access the source array ' s target ports through the FC fabric, after which an import relationship is established between the source LUN and the destination ONTAP LUN. SyncMirror is used for synchronous plex mirroring within MetroCluster architecture, while SnapMirror and BlueXP replication are ONTAP replication technologies and do not provide this foreign-array LUN import workflow. The precise source-array/model combination must also be validated against NetApp interoperability requirements. Relevant topics include FLI discovery, FC zoning, foreign LUNs, import relationships, and migration validation.

In a traditional FAS SAN configuration, ONTAP uses ALUA to distinguish optimized paths from non-optimized paths. Active/Optimized paths are serviced by the controller associated with the aggregate and LUN being accessed. These paths provide the preferred I/O route because data does not need to be forwarded through another controller. Paths through the HA partner remain available but are normally Active/Non-Optimized and are used when optimized paths become unavailable. NetApp host configuration guidance explicitly describes AFF and FAS systems as having higher-priority Active/Optimized paths serviced by the controller where the aggregate resides and lower-priority non-optimized paths served through another controller. Round-robin is a host multipathing policy and does not define ALUA path state. Relevant topics include ALUA, Active/Optimized paths, Active/Non-Optimized paths, FAS multipathing, and HA architecture.