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Overview
The Metro Node MN-215 is a high-availability, dual-node appliance designed to provide active-active synchronous replication for storage environments across metro distances or within a local data center. It virtualizes data across multiple storage arrays to deliver continuous availability, zero data loss (RPO = 0), and near-zero recovery time (RTO = 0). It supports multi-platform replication (across Dell and third-party storage arrays) without performance overhead on the arrays and requires no additional host software.
It is typically deployed in paired clusters (single or dual cluster / metro) to enable data mobility, site failover, and continuous service in the face of site failures.
Features
- Active-Active Synchronous Replication — Supports redundant data writing to both sites in real time, ensuring zero data loss and immediate failover.
- Zero RPO / Zero RTO — Designed to immediately maintain data integrity and service continuity in failover events.
- Cluster Witness Support — Optional cluster witness server can automate decision-making during failures and initiate failover.
- Multi-platform Storage Support — Works with Dell storage arrays (PowerMax, PowerStore, UnityXT, PowerVault) as well as supported third-party arrays.
- Granular Volume-Level Replication — You can replicate at the LUN / volume level, not just entire arrays.
- Non-Disruptive Operations — Addition or removal of consistency groups, upgrades, or migrations can occur without downtime.
- Hardware Redundancy & High Availability — Dual redundant components, hot-pluggable power supplies, and clustered architecture for resilience.
- Flexible Deployment Modes — Supports “local” (within same site) high-availability configurations as well as metro (cross-site) synchronous deployments.
- Integrated Management — The Metro Node OS includes built-in management; no host agents or separate management servers are needed.
- WAN Connectivity Options — Equipped with WAN IP (10/25 GbE) and WAN FC (32 Gb FC) ports for inter-cluster communications in metro deployments.
Specifications
Aspect
Specification
Server Platform
Based on Dell PowerEdge R750 hardware
Cluster
2-node cluster (dual directors)
Front-End (FE) Ports
4 ports
Back-End (BE) Ports
4 ports
WAN IP Ports
2 ports (10/25 GbE)
WAN FC Ports
2 ports (32 Gb Fibre Channel)
Processor
2 × Intel Xeon Gold CPUs
Memory
64 GB RDIMM per node (32 GB per CPU)
Storage (OS drives)
960 GB SSD SATA per server node
Power Supplies
2 × 1400 W redundant, hot-pluggable per node
Form Factor
2U per server (total 4U cluster)
Dimensions (per node)
Approx. 86.8 mm height × 434 mm width × 736.3 mm depth
Weight
Around 35.3 kg per node
Interconnects & Cabling
Includes management (MGMT1/2), local connectivity (LCOM), redundant power, and inter-node cabling via Cable Management Arm (CMA)
Deployment Modes
Local cluster, dual cluster (metro), single cluster high-availability
Operating System
Metro Node OS (embedded)
Supported Storage
Dell block-capable arrays and qualified third-party arrays
Failover Support
Cluster Witness, automatic failover, decision-time objective (DTO) = 0
Redundancy & HA
Redundant components, dual power feeds, clustered design
Inter-node Latency Tolerance
Recommended RTT less than 10 ms for metro deployments
