Synology SAT5221 960GB 2.5″ SATA Enterprise SSD (SAT5221-960G) – Power-Loss Protection, 1,700 TBW

Enterprise SATA flash sized for NAS caching and application volumes.

The Synology SAT5221-960G is a 960GB 2.5-inch SATA enterprise SSD built for Synology NAS and SAN systems. Featuring power-loss protection, steady-state 500MB/s performance and over 1,700 TBW of endurance, it is a strong choice for SSD cache, application volumes and smaller all-flash pools.

The Right Capacity for NAS Cache and Apps

Many Synology deployments need fast storage for caches, Docker containers and virtual machines without investing in a large all-flash array.

The SAT5221-960G offers a practical middle capacity with enterprise endurance and power-loss protection, accelerating key workloads while hard drives handle bulk storage.

Fast, Consistent Performance

Steady-state 500MB/s throughput and 90K random read IOPS keep caches, containers and VMs responsive under sustained load.

Protected and Validated

Power-loss protection safeguards in-flight data, and DSM integration provides health monitoring and firmware updates.

Setup Instructions

How to Install the Synology SAT5221-960G

1. Check that your Synology NAS or SAN model lists the SAT5221 in its compatibility list and update DSM.
2. Mount the SSD in a drive tray using the 2.5-inch screw positions (or tool-less clips where supported).
3. Insert the tray into a free bay; hot-swap is supported on most Synology models.
4. In Storage Manager, create an all-flash storage pool or configure an SSD cache.