Synology DX517

Synology DX517
The Synology DX517 is suitable for any business and is a reliable solution for situations where you're running out of storage capacity. It is a storage expansion kit with five bays for 2.5/3.5" SATA III HDD/SSD drives, allowing selected Synology devices to easily gain more storage space. In addition, the DX517 is capable of intelligently powering on or off the connected server, so no user intervention is required to activate power-saving or efficient operation. It connects to the main server via a single eSATA interface, which ensures stable data transfer. The device supports the quick addition of another five bays without the need for complex configuration of the entire system. This gives users additional space for storing large amounts of data and running demanding applications.
Key Features of the Synology DX517 NAS Expansion Unit
- The Synology DX517 expansion kit has 5 drive bays
- The kit features a SATA III interface
- The Synology DX517 offers simple operation with automatic functions
- The tray design does not require screws to secure the drives
- The system supports hot-swapping of drives
- The power supply synchronises with the main network storage
- Cooling is provided by two 80mm fans
- The total weight of the empty unit is 3.91kg
- The connection to the main server uses the eSATA interface
Expansion Unit
The DiskStation Manager system manages the added bays directly on the host device. The system immediately detects new drives once connected with the cable. The system expands the volume fully online without interrupting active services. Users do not need to disconnect connected clients or stop running applications. The storage thus remains constantly available.
Hot-swappable Drives
The device supports hot-swap technology for quick drive handling. Drives can be replaced or added while the system is fully operational. There is no need to shut down the entire network storage when replacing a faulty drive. This system reduces downtime in the workflow. Indicator lights clearly show the status of individual bays.
Design and Local Data Backup
Physical installation of the drives does not require any tools. The screwless mechanism for securing 3.5" drives speeds up assembly. Users simply click the hard drives into the prepared trays and slide them into the bays. This system simplifies the maintenance of the entire hardware. The firm seating of the drives also reduces vibration during operation. The device also functions as a separate backup destination for the main DiskStation. After creating an independent volume, it is used to store local data. This separate space protects important data from primary system failure. Backups can be automated in the task scheduler. The data remains securely stored on separate hardware.
Drive Support and Cooling
The bays are compatible with various types of storage media. The design accommodates standard 3.5" hard drives as well as smaller 2.5" drives. Users can combine fast SSDs with high-capacity HDDs. The system supports the SATA interface for all media types. The choice of specific drives depends on speed and capacity requirements. Stable cooling of the internal space is handled by two 80×80mm system fans, which can be easily replaced if necessary. The device has a typical power consumption of 29.9W during full operation. In hard drive hibernation mode, consumption drops to 2.4W. The noise level during measurement is 21.5 dB. The power supply requires an AC input voltage of 100V to 240V AC with a single-phase frequency of 50/60Hz.
Package contents:
Main unit, accessory pack, manual, power cable
Number of drive bays (2.5" and 3.5"):
5×
Compatible drive type:
2.5" SATA SSD, 2.5" SATA HDD, 3.5" SATA HDD
eSATA:
1×
Features:
Hot swap
Standby power consumption:
2.4W
Typical power consumption:
29.9W
Weight:
3.91kg
Depth:
233mm
Height:
157mm
Specifications
Storage
Supported disks
Interface
Features and functions
Consumption
Dimensions and weight
Package contents
Compatibility
Design
Synology GmbH, Grafenberger Allee 125, 40-237 Düsseldorf, [email protected], +49 211 9666 9666
Specifications can be changed without notice. Images are for illustrative purposes only.

