The Synology Expansion Unit DX517 – 5-Bay Storage Expansion is a flexible and reliable storage expansion solution designed for Synology DiskStation and RackStation NAS models. Featuring
five hot-swappable 3.5"/2.5" SATA drive bays, the DX517 allows businesses and advanced users to expand their NAS capacity instantly without downtime.
With
plug-and-play integration, Synology Hybrid RAID (SHR) support, and automatic volume expansion, this unit is ideal for growing data storage needs, backup solutions, and high-capacity applications.
Drive Bays
- 5 x 3.5"/2.5" SATA HDD/SSD (hot-swappable)
- Supports both SATA III (6Gb/s) and SATA II (3Gb/s) drives
Storage Expansion
- Expands the storage capacity of supported DiskStation and RackStation models
- Automatic volume expansion without system downtime
- Supports creation of new volumes for independent storage use
- Compatible with Synology Hybrid RAID (SHR), JBOD, RAID 0, 1, 5, 6, 10
Connectivity
- Interface: 1 × eSATA (dedicated connection to host NAS)
- Max Bandwidth: 6 Gb/s transfer speed via eSATA
Performance
- Plug-and-play setup ensures minimal downtime
- Integrated with Synology DSM for centralized storage management
- Supports SSD cache with compatible drives for improved performance
Design & Build
- Hot-swappable drive trays for quick installation and replacement
- Compact and quiet design for office/server room environments
- Equipped with smart-controlled fan for efficient cooling
Power & Efficiency
- Power Supply: External 100 W
- Power Consumption:
- ~21 W (access)
- ~9 W (HDD hibernation)
Physical Specifications
- Dimensions (H × W × D): 157 × 248 × 233 mm
- Weight: ~3.9 kg (without drives)
Compatibility
- Works with select Synology DiskStation and RackStation models
- Supported models can be expanded up to their maximum capacity with DX517
Warranty & Support
- Warranty: 3 Years (extendable in some regions)
Typical Use Cases
- Seamless NAS expansion for growing business data
- Backup storage for critical workloads
- Media archiving for creative teams
- Surveillance video retention with Surveillance Station
Key Features
- 5 hot-swappable 3.5"/2.5" SATA drive bays
- eSATA connectivity with 6 Gb/s bandwidth
- Plug-and-play volume expansion with no downtime
- Supports Synology SHR and multiple RAID levels
- Compact, efficient, and quiet design
Meta Description
Synology Expansion Unit DX517 – 5-Bay Storage Expansion with 5 hot-swappable SATA drive bays, eSATA connectivity, and support for SHR/RAID. Expand your DiskStation or RackStation storage seamlessly without downtime.
Datasheet
