The Synology Expansion Unit RX418 – 4-Bay Rackmount Storage Expansion is a
1U rackmount 4-bay expansion chassis designed to provide scalable storage for Synology RackStation servers. With
four hot-swappable 3.5"/2.5" SATA drive bays and seamless integration through a dedicated
eSATA connection, it allows businesses to expand their existing NAS capacity instantly without downtime.
Ideal for enterprise, SMBs, and data-driven environments, the RX418 ensures reliable performance, enterprise-grade management, and efficient backup solutions.
Drive Bays
- 4 x 3.5"/2.5" SATA HDD/SSD (hot-swappable)
- Supports SATA III (6Gb/s) and SATA II (3Gb/s) drives
Storage Expansion
- Expands storage capacity of compatible Synology RackStation models
- Supports online volume expansion and creation of independent volumes
- RAID support includes Synology Hybrid RAID (SHR), JBOD, RAID 0, 1, 5, 6, 10
Connectivity
- Interface: 1 × eSATA (dedicated host connection)
- Bandwidth: 6 Gb/s per drive bay for smooth data flow
Performance
- Instant plug-and-play expansion without system downtime
- Supports SSD caching with compatible drives for performance boosts
- Integrated into Synology DSM for easy and centralized storage management
Design & Build
- Form Factor: 1U rackmount chassis
- Hot-swappable drive trays for quick installation and replacement
- Efficient cooling with integrated smart-controlled fans
Power & Efficiency
- Power Supply: 250 W AC power supply
- Power Consumption:
- ~31 W (access)
- ~15 W (HDD hibernation)
Physical Specifications
- Dimensions (H × W × D): 44 × 480 × 222 mm
- Weight: ~4.6 kg (without drives)
Compatibility
- Designed for Synology RackStation models supporting expansion units (e.g., RS822+, RS1221+, RS1619xs+, etc.)
- Expands maximum raw storage capacity depending on host NAS
Warranty & Support
- Warranty: 3 Years (extendable in select regions)
Typical Use Cases
- Rackmount NAS capacity expansion for growing business data
- Centralized backup storage for enterprise workloads
- Surveillance video archiving with Synology Surveillance Station
- Scalable hybrid cloud storage with Synology C2 integration
Key Features
- 1U rackmount chassis with 4 drive bays
- Supports both 3.5" and 2.5" SATA HDD/SSD drives
- Seamless expansion via dedicated eSATA connection
- RAID flexibility with SHR and traditional RAID modes
- Enterprise-ready with hot-swap design and smart cooling
Meta Description
Synology Expansion Unit RX418 – 4-Bay Rackmount Storage Expansion with 4 hot-swappable SATA drive bays in a 1U rackmount chassis. Expand your RackStation NAS instantly via eSATA with RAID support and enterprise reliability.
Datasheet
