Synology DX517 5-Bay Expansion Enclosure – DX517
Description
The Synology DX517 is a 5-bay, diskless expansion unit that seamlessly increases the capacity of compatible Synology DiskStation NAS systems. It supports both 3.5″ and 2.5″ SATA drives, enables on-the-fly RAID volume expansion without service interruption, and can serve as a dedicated local backup destination for enhanced data protection.
Hardware Specifications
| Specification | Details |
|---|---|
| Drive Bays | 5 × hot-swappable 3.5″/2.5″ SATA HDD/SSD |
| Drive Compatibility | Synology-validated 3.5″ or 2.5″ SATA drives (sold separately) |
| Expansion Interface | 1 × eSATA port for host connection |
| Host Requirements | DSM 6.2.1-23824-5 or later on select DiskStation models |
| Power Input | 100–240 VAC, external power adapter |
| Dimensions (W × D × H) | 248 × 233 × 157 mm |
| Weight | 3.91 kg |
| Operating Temperature | 5 °C to 40 °C |
| Storage Temperature | –20 °C to 60 °C |
| Operating Humidity | 5% to 95% RH (non-condensing) |
| Storage Humidity | 5% to 95% RH (non-condensing) |
| Warranty | 3-year hardware warranty (extendable to 5 years with Extended Warranty Plus) |
Dimensions and weight measured without drives installed.
Key Features
- Online Volume Expansion
Expand existing RAID volumes via DiskStation Manager without powering down or reformatting. - Hot-Swappable, Screwless Trays
Install or replace drives quickly with tool-free trays that eject under load. - Dedicated Local Backup
Configure DX517 as a separate volume for automated, on-premises backup of your DiskStation. - Plug-n-Play Integration
Auto-detects in DSM and instantly makes additional bays available once connected. - Synology-Validated Drives
Engineered to handle 24/7 workloads; full functionality and warranty guaranteed with validated drives.
Compatibility
Compatible with DiskStation models featuring an eSATA expansion port, including but not limited to:
- DS118, DS218j, DS218+, DS418j, DS418
- DS718+, DS918+, DS1019+, DS1018+ II, DS1618+
- DS1819+ and select 15/16-series models (DSM 6.2.1-23824-5 or later required)
Refer to the Synology compatibility list for the complete set of supported NAS systems and drives.
Environmental & Acoustic
- Power Consumption
Measured with Western Digital WD10EFRX 1 TB drives; consult Synology for detailed values. - Noise Level
Tested fully loaded with Seagate ST31000520AS drives under idle conditions (GRAS Type 40AE microphones at 1 m distance).
Ideal Use Cases
- Rapid capacity scaling for growing file shares, backups, or surveillance archives
- Local backup target to safeguard critical NAS data
- Cost-efficient storage expansion for home offices, studios, and small businesses
- Seamless integration into existing Synology NAS clusters for high-availability deployments
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