Which replication option is designed for zero data loss and continuous availability for NAS workloads?

• A. Storage VM disaster recovery
• B. MetroCluster over IP
• C. SnapMirror Business Continuity
• D. SnapMirror Synchronous

Answer: (C)

The goal is to keep NAS data available with no data loss across sites. SnapMirror Business Continuity builds on SnapMirror replication and adds automatic failover and continuous protection tailored for NAS workloads. It keeps NAS volumes synchronized in near real time and can transparently switch operations to the secondary site if the primary site fails, delivering zero data loss and continuous access for NFS/SMB data.

Storage VM Disaster Recovery focuses on DR for virtualized storage services rather than NAS data paths. MetroCluster over IP is a robust, heavy-weight HA/DR solution that provides continuous availability, but it is broader and more complex, often overkill for NAS-specific continuity. SnapMirror Synchronous offers zero data loss at the block level, but is typically oriented toward SAN/LUN replication and may not optimally address NAS continuity needs.