Synology DX517 Disk Array

The Disk Array Synology DX517 is a 5-bay expansion unit for Synology DiskStation systems, supporting both 3.5" and 2.5" SATA HDDs and SSDs. Designed for desktop use, the DX517 enables on-the-fly capacity expansion or a dedicated local backup volume, and connects to the host NAS to increase available storage without replacing existing drives.

Advantages

The DX517 provides five additional drive bays that integrate with Synology DiskStation Manager for online volume expansion, so storage and services on the host NAS remain available during expansion. Its hot-swappable, screwless drive trays simplify drive installation and replacement without powering down the system. The unit supports both HDD and SSD form factors, allowing flexible configurations for performance or capacity needs.

Suitable for

• Small and medium businesses needing additional NAS storage capacity
• Users who require on-the-fly volume expansion for existing Synology DiskStation devices
• Setups that need a dedicated local backup destination for DiskStation data

Key specifications

• Model: Synology DX517
• Drive bays: 5 (supports 3.5" and 2.5" SATA HDD/SSD)
• Chassis type: Desktop
• Weight: 3.91 kg
• Color: Black
• MPN: DX517 · EAN: 4711174722679

How to use

Connect the DX517 to a compatible Synology DiskStation following the host NAS connection procedure in DiskStation Manager. Once connected, manage the additional bays from DiskStation Manager to add them to an existing volume or create a separate volume for local backups. Install drives into the screwless, hot-swappable trays and perform configuration through the host NAS interface; no shutdown is required for drive insertion or removal.

Recommendations

Use drives recommended by Synology for compatibility and reliability, and configure the DX517 as part of a backup strategy or volume expansion plan within DiskStation Manager. Regularly verify backups and monitor drive health using the host NAS tools.