







SYNOLOGY DX517 | 5-BAY EXPANSION UNIT – DISKLESS
FEATURES:
- Online volume expansion
- Dedicated local backup solution
- Hot-swappable drive tray design
- Synchronised system operation with DiskStation
Synology DX517 | 5-Bay Expansion Unit - Diskless
Synology DX517 offers a simple storage capacity expansion solution for your DiskStation through its intuitive plug-n-use design. DX517 allows you to instantly scale up to 5× additional hard drives, so that you can expand RAID volume online or deploy the drives as a dedicated local backup destination for your Diskstation.
FEATURES:
- Online volume expansion
- Dedicated local backup solution
- Hot-swappable drive tray design
- Synchronised system operation with DiskStation
SPECIFICATIONS:
| Applied Models | Supports Creating Volumes Across Different Units | 23 Series: DS1823xs+, DS923+, DS723+ |
| 22 Series: DS1522+ | ||
| 21 Series: DS1821+, DS1621xs+, DS1621+, DVA3221 | ||
| 20 Series: DS1520+, DS920+, DS720+ | ||
| 19 Series: DS1819+, DS1019+, DVA3219 | ||
| 18 Series: DS1618+, DS918+, DS718+, NVR1218 | ||
| 17 Series: DS1817+, DS1817, DS1517+, DS1517 | ||
| 16 Series: DS916+, DS716+II, DS716+ | ||
| 15 Series: DS1815+, DS1515+, DS1515 | ||
| Supports Creating Volumes on a Single Unit Only | 18 Series: DS218+ | |
| 16 Series: DS216+II, DS216+, NVR216 | ||
| 15 Series: DS415+ | ||
| Notes | Please upgrade to DSM 6.2.1-23824-5 or later version before using it with 15 and 16 series models (excluding DS1515, DS716+, and DS716+II). | |
| For a better performance, we recommend creating storage volumes physically located within the same NAS or Expansion Unit, rather than creating volumes across your NAS and Expansion Unit. | ||
| Storage | Drive Bays | 5× |
| 3.5" SATA HDD | ||
| 2.5" SATA HDD | ||
| 2.5" SATA SSD | ||
| Hot Swappable Drive | Yes | |
| RAID Management through Synology DSM | Yes | |
| Notes | Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability. | |
| External Ports | eSATA Port | 1× |
| Appearance | Size (H × W × D) | 157 × 248 × 233mm |
| Weight | 3.91kg | |
| Power | Power Recovery | Synchronised with the Synology DiskStation |
| Power Supply Unit / Adapter | 200W | |
| AC Input Power Voltage | 100~240VAC | |
| Power Frequency | 50/60Hz, Single Phase | |
| Power Consumption | 29.9W (Access) | |
| 2.4W (HDD Hibernation) | ||
| British Thermal Unit | 102.02 BTU/hr (Access) | |
| 8.19 BTU/hr (HDD Hibernation) | ||
| Notes | Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s). | |
| Temperature | Operating Temperature | 5~40°C |
| Storage Temperature | -10~70°C | |
| Operating Humidity | 8~80% RH | |
| Storage Humidity | 5~95% RH | |
| Others | System Fan | 2× 80 × 80mm |
| Easy Replacement System Fan | Yes | |
| Noise Level | 21.5dB(A) | |
| Notes | Noise Level Testing Environment: Fully loaded with Seagate 1TB ST31000520AS hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1m away from the Synology NAS at the front and rear. Background noise: 16.49~17.51dB(A); Temperature: 24.25~25.75°C; Humidity: 58.2~61.8% | |
| Certification | FCC | |
| CE | ||
| BSMI | ||
| BIS | ||
| Warranty | 3-Year Hardware Warranty, Extendable to 5-years with EW201 or Extended Warranty Plus | |
| Notes | Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions. | |
| The warranty period starts from the purchase date as stated on your purchase receipt. | ||
| Environment | RoHS Compliant | |
| Packaging Content | 1× Main Unit | |
| 1× Accessory Pack | ||
| 1× AC Power Cord | ||
| 1× Expansion Cable: eSATA | ||
| 1× Quick Installation Guide | ||
| Optional Accessories | Enterprise Series 3.5" SATA HDD: HAT5300 Series | |
| Plus Series 3.5" SATA HDD: HAT3300 Series | ||
| Enterprise Series 2.5" SATA SSD: SAT5200 Series | ||
Additional information
| Weight | 5 kg |
|---|---|
| Dimensions | 35.5 × 31.8 × 29.2 cm |




