
Synology DS418 4-Bay NAS: High-Performance DiskStation
Quad-core NAS muscle delivers 226 MB/s reads and dual-1GbE failover for offices that can't afford downtime.
*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
Sequential throughput performance at over 226 MB/s reading and 170 MB/s writing
Dual 1GbE ports with failover and Link Aggregation support
Compatible Drive Type-3.5 inch SATA HDD, 2.5 inch SATA HDD, 2.5 inch SATA SSD. "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay
Check Synology knowledge center or YouTube channel for help on product setup and additional information
Check the product specification page for the software or application you want to use
Specifications
Pros & Cons
👍 Pros
- Sequential read throughput exceeds 226 MB/s, saturating a single 1GbE link and making dual-port aggregation genuinely worthwhile.
- Dual 1GbE with failover means a port or cable failure does not interrupt access — critical for small office shared storage.
- Hardware 4K transcoding offloads video decode from the main CPU cores, keeping the NAS responsive during media streaming.
- Four bays provide enough capacity and RAID flexibility (including RAID 6 dual-parity) to protect against simultaneous dual-drive failures.
- DSM's package ecosystem (Active Backup, Surveillance Station, Docker) turns the DS418 into a multi-role server without additional hardware.
👎 Cons
- Both ports are 1GbE maximum — there is no 10GbE expansion slot, so the 226 MB/s read ceiling cannot be exceeded regardless of drive speed.
- The base RAM is non-expandable on the DS418, which can become a constraint when running multiple DSM packages concurrently.
- No M.2 NVMe SSD cache slot means you cannot add a tiered cache drive to accelerate random I/O as you could on higher-tier Synology units.
- Four bays limits raw capacity scaling; power users expecting to grow beyond four drives will need to migrate to a larger chassis.