The Synology SA3400D is a 2U high-availability NAS with dual controllers in an active-passive setup for minute-level failover. Each node features an Intel Xeon 8-core CPU, delivering over 340,000 4K random read IOPS. This 12-bay system supports SAS drives, dual 10GbE ports, and redundant 500W power supplies to eliminate single points of failure. Scalable to 36 bays, it is certified for VMware and OpenStack, offering high-performance block storage and virtualization. With DSM-powered data protection and a 5-year warranty, it is ideal for mission-critical uptime.