Synology DiskStation DX517 NAS Expansion Unit

Synology Part #/MPN: DX517

DiscTech Item #: SYN-DX517-BN-3Y

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    Special Order - Ships in 5-10 business days

    This item has a lead time for fulfilment (as listed), this is approximate. Your credit card will be authorized in full on the day of ordering; it will not be charged until the day of shipment.


Interface Types: SATA, eSATA External

Form Factor: 3.5inx1.0in LFF Hard Drive

Electrical Interface: SATA 600 - 6.0Gbps

Bays/Ports/Slots: 5

Wattage/VA: 200W

Voltage: 110-240V Multi

Synology DiskStation DX517 5-Bay SATA NAS Expansion Unit - Diskless - Brand New

Synology DiskStation DX517 Expansion Unit includes...

  • 1x eSATA port
  • 5 drive bays
  • accepts 3.5" and 2.5" SATA hard drives and 2.5" SATA solid state drives.

Expansion Unit DX517
Effortless capacity expansion for Synology DiskStation1 solutions on-the-fly.

5-bay 3.5"/2.5" SATA expansion
Easily add 5 additional drive bays to Synology DiskStation1. Supporting both 2.5" and 3.5" SATA drives, DX517 is a flexible solution supporting on-the-fly volume expansion or serving as a local backup destination.

Online volume expansion
Managed from DiskStation Manager on the host NAS, the additional bays in the DX517 are immediately ready to be used once connected. On-the-fly volume expansion ensures that storage and services on the host are not interrupted during volume expansion.

Hot-swappable drive tray design
The hot-swappable drive trays of DX517 allow easy drive installation and replacement without powering down the system. Screwless drive tray design reduces the time needed for system setup.

Dedicated local backup solution
Synology DX517 can be used as a dedicated local backup solution for the Synology DiskStation. When created as a separate volume, the DX517 provides a great backup solution to its local hard disks in case of system failure.


Supported models ...


Model NumberDX517
Applied Models
  • DS1817+
  • DS1517+
  • DS918+
  • DS718+
  • DS1817
  • DS1517
  • NVR1218
    Drive Bay(s)5
    Compatible Drive Type3.5in SATA III / SATA II HDD
    2.5in SATA III / SATA II HDD
    2.5in SATA III / SATA II SSD
    Maximum Internal Raw Capacity60 TB (12 TB HDD x 5)
    (Capacity may vary by RAID types)
    Hot Swappable DriveYes
    RAID Management through Synology DSMYes
    eSATA port1
    Size (Height x Width x Depth)157 mm x 248 mm x 233 mm
    Weight3.91 kg/ 8.62 lb
    Power RecoverySynchronized with the Synology DiskStation
    Power Supply Unit / Adapter200W
    AV Input Power Voltage100V to 240V AC
    Power Frequency50/60 Hz, Single Phase
    Power Consumption
  • 29.9 W (Access)
  • 2.4 W (HDD Hibernation)
  • British Thermal Unit
  • 102.02 BTU/hr (Access)
  • 8.19 BTU/hr (HDD Hibernation)
    System Fan80 mm x 80 mm x 2 pcs
    Easy Replacement System FanYes
    Noise Level21.5 dB(A)
  • FCC Class B
  • CE Class B
  • BSMI Class B

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    ROHS Compliant

    Weight: 10 lb

    Warranty: 3 Year Manufacturer

    Brand New

    Condition Levels Explained

    The product is brand new.

    3 Year Manufacturer Warranty

    Product Warranties Explained

    The product has a manufacturer warranty for the time period specified.