Ensure uninterrupted mission-critical business operations with the high-availability ES1686dc R2 NAS. With redundant controllers and power supplies. it minimizes downtime. allowing seamless component replacement without disruption. ensuring reliability and continuity for enterprises.Intel® Xeon® D processors bring high performance and efficiencyPowered by two Intel® Xeon® D processors. the ES1686dc R2 features a dual active-active controller architecture that provides failover/failback operations as the standby controller takes over if one controller breaks down.PCIe Gen 3 slotsThe ES1686dc R2 provides two PCIe Gen 3 x8 slots per controller connected to the CPU. allowing you to add additional functionality to meet growing workload and business requirements.Petabyte-scale. dual-controller SAS storage expansionGain petabyte-scale storage capacity using the Qnap’s expansion enclosure. Dual-channel (dual-path) connections allow service continuity even if one node fails.QES: ZFS-based OS designed for HA systemsThe ES1686dc R2 uses the QES operating system.