Keeping your data safe is essential, especially when using a NAS to store critical files. One common threat to data safety is power loss, which can lead to data corruption or hardware damage. The best protection against sudden power failures is connecting your Synology NAS to a UPS (Uninterruptible Power Supply). In this guide, we’ll show you how to physically connect the UPS and configure your Synology NAS to automatically shut down safely when needed.
Step 1: Choose a Compatible UPS
Before purchasing or connecting a UPS, check Synology’s UPS compatibility list to ensure your model is supported. Most major brands like APC, CyberPower, and Eaton work out-of-the-box with Synology NAS devices.
Step 2: Connect the UPS to Your Synology NAS
1. Physical connection – Use the right USB cable
You’ll need a USB Type-A to Type-B cable (often called a printer cable):
- UPS side: USB Type-B port (square shape with slightly beveled edges)
- Synology NAS side: USB Type-A port (standard rectangular USB port)
✅ Most UPS units include this cable. Some newer models may use USB-C—check your UPS manual.
2. Power connection – Protect the NAS directly
Plug your NAS power cable into one of the UPS battery-backed outlets (not a surge-only outlet).
Step 3: Configure UPS Support in DSM
- Log into your Synology DSM interface.
- Go to Control Panel > Hardware & Power > UPS.
- Enable “Enable UPS support.”
DSM will show UPS details like manufacturer, model, and battery status.
Step 4: Set Safe Shutdown Options
Configure automatic shutdown after power loss:
- Go to Control Panel > Hardware & Power > UPS.
- Set a delay before shutting down (e.g., 5 minutes).
Step 5: (Optional) Enable Network UPS Server
If other devices share the UPS, Synology can broadcast UPS status to them:
- Enable “Enable network UPS server.”
- Add the IP addresses of devices needing power status.
Step 6: Test the Setup
After setup, test your configuration:
- Unplug the UPS from the wall to simulate power loss.
- Verify DSM detects the power loss.
- Confirm the NAS shuts down gracefully if power stays off.
Pro Tips for UPS & NAS Setup
💡 Pro Tip:>Choose the right UPS size: Ensure your UPS handles the combined power of your NAS, router, and switch with at least 30% headroom.
💡 Pro Tip:Don’t forget the network: Protect your router and switch with the same UPS for full network continuity.
💡 Pro Tip:Replace UPS batteries regularly: Most batteries last 2-3 years—replace them to maintain protection.
💡 Pro Tip:Test regularly: Simulate power cuts every 6 months to verify the setup works correctly.
Summary
Connecting a UPS to your Synology NAS protects against sudden power loss. Combined with automatic safe shutdown, this gives you:
- ✅ Data corruption prevention
- ✅ Protection for NAS hardware and drives
- ✅ Automatic, unattended safe shutdown
👉 Looking to buy a Synology NAS? Visit nasstore.eu for great deals on Synology products and accessories, including UPS devices.