Continuous Availability for Modern Enterprise Storage
Zero downtime. Zero complexity. Full control.
The euroNAS High Availability Cluster turns standard servers into a continuously available storage platform that keeps your business running even when hardware fails. Every volume, share, and iSCSI target remains live; every packet is synchronised in real time and every node works together under a single, intuitive control plane.
Designed for Resilience
At its core, the euroNAS cluster consists of two or more servers operating as peers. Each node monitors the other through dedicated heartbeat and replication links. If one fails, the surviving node automatically takes over its IP addresses, volumes, and services within seconds — no manual recovery, no loss of data.
Administrators can choose between mirrored operation, where data is synchronously written to both nodes, or shared-storage mode, where each node accesses a common backend over iSCSI, SAS, or Fibre Channel. The flexibility to mix both topologies means you can design clusters to match your environment rather than forcing your infrastructure to adapt to rigid software rules.
Networking is equally deliberate. The system separates public traffic from replication and management networks, using static addressing for deterministic routing. 1 GbE, 10 GbE, and 25 GbE links are supported, with bonding and VLAN segmentation for throughput and redundancy. Whether configured through direct peer links or full-switch backbones, communication remains fast, secure, and predictable.
The Storage Layer — Unified, Flexible, and Built for Every Workload
The heart of the cluster is its storage engine — a design that embraces all major storage paradigms in one unified framework. Whether you’re hosting virtual machine datastores, departmental file shares, or multi-tenant backup archives, euroNAS delivers the flexibility to combine different media, protection schemes, and access protocols without compromise.
Each node contributes local drives — SATA, SAS, SSD, or NVMe — which are either mirrored across the cluster or shared via SAN links. In mirrored mode, every write is committed to both nodes simultaneously, guaranteeing consistency at all times. In shared-storage mode, both nodes connect to the same block device so either can take over instantly if one fails. This modular design allows administrators to blend mirrored and shared volumes within the same cluster, optimising performance, cost, and redundancy per workload.
Underneath it all, euroNAS doesn’t force a single storage philosophy. You can run mirrored volumes on bare disks, software-defined arrays, or enterprise RAID controllers and manage them all from the same interface. ZFS is available when you need full data-integrity validation, self-healing, and native snapshots. Linux RAID gives straightforward redundancy without licensing or vendor lock-in. Hardware controllers from Broadcom, Adaptec, or Dell are detected automatically and expose their status, rebuild, and hot-spare functions directly through the GUI.
No command lines, no plug-ins, no forced templates — just the storage stack you choose, controlled from one place.
Performance is accelerated through hybrid caching, which intelligently pairs large-capacity HDDs with SSD or NVMe devices. Frequently accessed blocks are promoted to the faster tier automatically, combining the capacity of disks with the responsiveness of flash. NVMe drives can also act as dedicated write logs or read caches, reducing latency to sub-millisecond levels for high-IOPS applications such as databases or virtualisation hosts.
Data protection is woven through the design. Point-in-time snapshots capture consistent states without interrupting workloads and can be scheduled or triggered manually. Synchronous replication ensures both nodes are always identical, while background resynchronisation automatically heals any drift once a failed node returns. Combined with parity, checksums, and integrity validation at every layer, euroNAS delivers a self-healing, tamper-evident storage fabric built for uninterrupted service.
The High-Availability Engine
High availability is not an add-on feature; it’s the system’s DNA.
Heartbeat monitoring detects node or network failure within milliseconds. When a fault occurs, service IPs and workloads automatically transfer to the healthy node, and client sessions reconnect transparently. Once the failed system comes back online, it re-joins the cluster and synchronises only the data that changed during its absence. This self-healing loop eliminates manual recovery and removes downtime from the operational vocabulary.
Active-active configurations further enhance efficiency by letting each node host its own primary volumes. The cluster balances load, doubles throughput potential, and guarantees that all hardware contributes value instead of sitting idle as a passive standby.
Management and Visibility
All configuration and monitoring is performed through the euroNAS web console — a single pane of glass for the entire cluster.
The interface guides administrators through setup and maintenance: adding drives, building mirrors, configuring network bonds, scheduling snapshots, or joining Active Directory domains.
Real-time dashboards display node health, replication progress, network performance, and RAID status, while automated email alerts ensure potential issues are known before they impact service.
No scripting, no specialised training, and no external cluster manager are required — euroNAS keeps complex infrastructure manageable by design.
Security and Access Control
Security runs alongside availability.
The platform supports HTTPS management, certificate enforcement, and role-based administration.
Users can authenticate locally or through Active Directory, with fine-grained permissions for each SMB, NFS, iSCSI, or S3 resource.
Access lists and CHAP authentication protect block protocols, and all configuration changes are logged for audit compliance.
It’s a storage environment designed not only to stay online, but to stay controlled.
Performance and Scaling
euroNAS scales from a compact two-node mirror to a multi-node enterprise backbone.
Multi-threaded replication engines saturate 10 GbE and 25 GbE links with ease, while SSD caching and NVMe acceleration sustain high-IOPS workloads.
Adding capacity or replacing hardware requires no downtime — new disks and nodes join live, resynchronising automatically.
The result is predictable, linear scalability and performance that grows with your business.
Built for Every Environment
From virtualisation clusters to edge deployments, euroNAS adapts to any workload profile.
It can act as a VMware or Hyper-V datastore, a resilient database backend, a secure file server, or a redundant iSCSI target for mission-critical applications.
Its modular design means the same platform can power datacentres, branch offices, and cloud gateways alike, all with the same high-availability behaviour.
Why euroNAS
euroNAS High Availability Cluster delivers what traditional SANs and file servers can’t:
continuous uptime on open hardware, unified management, and seamless recovery from failure.
It removes the need for proprietary controllers or external replication software, offering enterprise-grade reliability through clean, transparent engineering.
Deploy it, mirror it, and forget downtime.
