Synology SA3400D 12-Bay Active-Passive NAS Enclosure with Dual Controllers

The Synology SA3400D represents Synology’s flagship enterprise unified storage solution engineered specifically for mission-critical business environments requiring absolute data availability, delivering dual-controller active-passive high availability architecture with Intel Xeon processors, 25GbE connectivity, all-flash or hybrid configurations, and comprehensive SAN/NAS protocol support to eliminate single points of failure and ensure continuous operation for virtualization, databases, VDI, and enterprise applications where downtime translates directly to business loss.

This professional dual-controller storage array provides the essential infrastructure for organizations demanding enterprise-grade availability, performance, reliability, and support with guaranteed uptime SLAs and professional implementation services.

Key Features

• 12 x 2.5″ drive bays (NVMe/SAS/SATA)
• Dual Intel Xeon D-1531 6-core controllers
• 32GB DDR4 ECC per controller
• Expandable to 128GB per controller
• Quad 25GbE SFP28 ports
• Active-passive high availability
• Automatic controller failover
• Redundant power supplies
• Redundant cooling fans
• SAT operating system
• iSCSI and FC support
• Unified storage (SAN + NAS)
• 2U rackmount form factor

Dual Controller Architecture

Active-Passive High Availability:

• Two independent controllers
• Active controller serves I/O
• Passive controller ready for failover
• Automatic failover (<30 seconds)
• No manual intervention required
• Zero data loss
• Continuous operation
• Single management interface

Controller Redundancy:

• Dual Intel Xeon D-1531 processors
• Independent memory per controller
• Separate network interfaces
• Heartbeat monitoring
• Failure detection
• Seamless takeover
• Transparent to clients

Intel Xeon D-1531 Processors

Enterprise-Class CPUs:

• Intel Xeon D-1531 per controller
• 6 cores per processor
• Base frequency: 2.2GHz
• Turbo boost: 2.7GHz
• x86 architecture
• Hardware-assisted virtualization
• AES-NI encryption
• Professional performance

Performance Capabilities:

• High IOPS for databases
• Low latency for VMs
• Multiple concurrent workloads
• Enterprise application support
• Inline data reduction
• Snapshot processing
• Replication operations

32GB ECC Memory Per Controller

Enterprise Memory:

• 32GB DDR4 ECC per controller
• Total: 64GB active + standby
• Expandable to 128GB per controller
• Error-correcting code (ECC)
• Data integrity protection
• Prevents corruption
• Mission-critical reliability

Memory Benefits:

• Large read cache
• Write coalescing
• Snapshot efficiency
• VM performance
• Database acceleration
• Inline deduplication
• Compression operations

Quad 25 Gigabit Ethernet

High-Speed Networking:

• 4 x 25GbE SFP28 ports per controller
• Total: 8 x 25GbE system-wide
• Built-in 25G connectivity
• Link aggregation
• Multipathing support
• Low latency
• High bandwidth

25GbE Performance:

• 3.125GB/s per port
• 100Gbps aggregate potential
• 2.5x faster than 10GbE
• Multiple concurrent hosts
• Virtualization storage networks
• High-performance workloads
• Future-proof connectivity

Network Redundancy:

• Dual paths per controller
• Multipath I/O (MPIO)
• Load balancing
• Path failover
• No single point of failure
• Maximum availability

Twelve 2.5″ Drive Bays

Flexible Drive Support:

• NVMe SSD support
• SAS SSD/HDD support
• SATA SSD/HDD support
• Hot-swappable drive trays
• All-flash configurations
• Hybrid configurations
• Capacity optimization

Configuration Options:

• All-flash: Maximum performance
• Hybrid: Performance + capacity
• All-HDD: Maximum capacity
• Tiered storage
• SSD caching
• Mixed drive types

RAID and Data Protection

Enterprise RAID:

• RAID 0/1/5/6/10/50/60
• SHR (Synology Hybrid RAID)
• Hot spare support
• Global hot spares
• Automatic rebuild
• Background scrubbing
• Bit rot protection

Data Protection Features:

• Dual parity RAID 6
• Triple mirror RAID 1E
• N+1/N+2 hot spares
• Predictive failure detection
• SMART monitoring
• Automatic alerts

Unified Storage Protocols

SAN Protocols:

• iSCSI (IP-based SAN)
• Fibre Channel (optional HBA)
• iSER (iSCSI Extensions for RDMA)
• Block-level storage
• LUN mapping
• LUN masking
• VAAI/ODX offload

NAS Protocols:

• SMB/CIFS 3.0 (Windows)
• NFS v3/v4.1 (Linux/Unix)
• AFP (Mac)
• FTP/SFTP
• WebDAV
• S3-compatible object storage
• File-level storage

Synology Active Technology (SAT)

Enterprise Operating System:

• SAT OS (Synology Active Technology)
• Web-based management
• CLI for automation
• REST API
• SNMP monitoring
• Syslog integration
• Active Directory/LDAP

SAT Features:

• Storage Manager
• High Availability Manager
• Snapshot Manager
• Replication Manager
• Volume management
• LUN management
• Performance monitoring

Snapshot and Replication

Data Protection:

• Instant snapshots
• Point-in-time recovery
• Snapshot schedules
• Retention policies
• Snapshot cloning
• Space-efficient
• Application-consistent

Replication:

• Asynchronous replication
• Synchronous replication
• Snapshot replication
• Remote replication
• Disaster recovery
• Multi-site protection
• RPO/RTO optimization

Inline Data Reduction

Storage Efficiency:

• Inline deduplication
• Inline compression
• Thin provisioning
• Space reclamation
• Automatic optimization
• Minimal performance impact
• Cost savings

Efficiency Benefits:

• 2-5x capacity savings typical
• Reduced storage costs
• Extended capacity
• Fewer drives needed
• Lower power consumption
• Reduced cooling

VMware Integration

vSphere Certified:

• VMware vSphere certified
• VAAI support (offload)
• VASA provider
• Site Recovery Manager
• vCenter integration
• vMotion support
• Production-ready

Virtual Machine Storage:

• Datastore hosting
• Multiple datastore support
• Thin provisioning
• Snapshot integration
• Fast cloning
• Instant VM recovery

Hyper-V Integration

Microsoft Certified:

• Hyper-V certified
• ODX support (offload)
• SMB 3.0 multichannel
• CSV support
• System Center integration
• Failover cluster support
• Production workloads

Redundant Components

No Single Point of Failure:

• Dual controllers
• Dual power supplies (hot-swap)
• Dual cooling fans
• Dual network paths
• Dual SAS expanders
• Redundant everything
• Maximum uptime

Hot-Swappable:

• Controllers (service)
• Power supplies
• Cooling fans
• Drive trays
• No downtime for maintenance

Ideal Applications

Virtualization:

• VMware vSphere clusters
• Microsoft Hyper-V clusters
• Virtual Desktop Infrastructure (VDI)
• Virtual machine storage
• Consolidated workloads
• Private cloud
• Disaster recovery

Database Servers:

• Microsoft SQL Server
• Oracle Database
• MySQL/PostgreSQL
• SAP HANA
• MongoDB
• High-performance databases
• Mission-critical databases

Enterprise Applications:

• ERP systems (SAP, Oracle)
• CRM applications
• Email servers (Exchange)
• SharePoint
• Business intelligence
• Web applications
• Line-of-business apps

VDI Deployments:

• Citrix Virtual Apps/Desktops
• VMware Horizon
• Windows Virtual Desktop
• Remote desktop services
• Boot storms handling
• User profile storage
• Persistent/non-persistent desktops

Healthcare:

• PACS (medical imaging)
• Electronic health records
• HIPAA compliance
• HL7 integration
• Radiology workloads
• High availability required
• Patient care systems

Financial Services:

• Trading platforms
• Transaction processing
• Compliance systems
• Real-time analytics
• Zero downtime tolerance
• Data protection
• Audit trails

Why Choose SA3400D

1. Dual-controller high availability
2. Active-passive failover
3. 25GbE high-performance networking
4. Intel Xeon enterprise processors
5. Unified SAN + NAS protocols
6. Inline data reduction
7. VMware/Hyper-V certified
8. 5-year warranty
9. Enterprise support
10. Mission-critical reliability

Expandability

Capacity Expansion:

• Connect expansion enclosures
• Scale to 100+ drives
• Seamless capacity growth
• No disruption
• Unified management
• Single namespace

Management and Monitoring

Enterprise Management:

• Web-based GUI
• Command-line interface
• REST API
• PowerShell integration
• Ansible support
• SNMP v2/v3
• Syslog forwarding

Monitoring:

• Real-time performance
• Historical statistics
• Capacity planning
• Alert notifications
• Email/SMS alerts
• Predictive analytics
• Health monitoring

Professional Services

Implementation Support:

• Professional installation
• Configuration services
• Migration assistance
• Training
• Best practices
• Optimization
• Health checks

What’s Included

• Synology SA3400D dual-controller unit
• 2 x Intel Xeon D-1531 controllers
• 64GB total ECC memory (32GB x 2)
• 4 x 25GbE SFP28 ports per controller
• 2 x redundant power supplies
• 12 x 2.5″ drive trays
• Rackmount rail kit
• SFP28 transceivers (quantity varies)
• Power cords
• Installation guide

Hard drives sold separately

Recommended Drives

Enterprise SSD:

• Synology SAT5210 SAS SSD
• Samsung PM1733/PM1643a
• Kioxia CD6/CM6
• Micron 7450/9400
• All-flash performance

Hybrid Configuration:

• SSD tier: Performance
• HDD tier: Capacity
• Automatic tiering
• Optimized cost/performance

Dimensions & Weight

Physical Specifications:

• Height: 88mm (2U / 3.46″)
• Width: 482mm (19″)
• Depth: 692mm (27.24″)
• Weight: ~25-30kg (without drives)

Rack Requirements:

• Standard 19-inch rack
• 2U rack space
• Adequate depth
• Redundant power circuits
• Network connectivity

Power Consumption

Enterprise Power:

• Typical: 200-350W (drive dependent)
• Redundant PSUs
• High efficiency
• 80 PLUS certification
• Power monitoring

Environmental

Operating Conditions:

• Temperature: 5°C to 35°C
• Humidity: 5% to 95% RH
• Altitude: 0 to 3,000m
• Proper data center cooling required

Warranty & Support

Enterprise Warranty:

• 5-year limited hardware warranty
• Advanced hardware replacement
• Global support network
• 24/7 technical support
• Dedicated account management
• Regular software updates
• Professional services available

Compliance & Certifications

Standards:

• VMware vSphere certified
• Microsoft Hyper-V certified
• Citrix Ready
• FIPS 140-2 (encryption)
• TAA compliant
• Safety certifications

Mission-critical dual-controller storage for enterprise high-availability environments – the Synology SA3400D delivers dual Intel Xeon D-1531 processors in active-passive configuration, 32GB ECC memory per controller, quad 25 Gigabit Ethernet, unified SAN/NAS protocols, automatic failover, and inline data reduction in a 2U 12-bay enterprise storage array, providing the guaranteed uptime, professional-grade performance, comprehensive data protection, and enterprise support required for virtualization clusters, mission-critical databases, VDI deployments, and business-critical applications where downtime is not an option!