Synology SAT5221 480GB 2.5″ SATA Enterprise SSD (SAT5221-480G) – Power-Loss Protection, 900 TBW

Synology-validated enterprise flash for cache and small all-flash pools.

The Synology SAT5221-480G is a 480GB 2.5-inch SATA enterprise SSD built for Synology NAS and SAN systems. With power-loss protection, steady-state 500MB/s performance and over 900 TBW of endurance, it is ideal for SSD caching, small all-flash volumes and application storage.

Reliable Caching for Synology NAS

SSD cache drives in a NAS see constant reads and writes. Consumer SSDs may lack power-loss protection and DSM validation, putting cached data and support at risk.

The SAT5221-480G is validated by Synology, includes power-loss protection and carries over 900 TBW of endurance, making it a dependable cache or app-volume drive for business NAS deployments.

Consistent Steady-State Performance

Synology rates the SAT5221 under steady-state conditions, so its 500MB/s and 90K IOPS figures reflect sustained real-world performance rather than short bursts.

Data Protection Built In

Dedicated capacitors provide power-loss protection, and DSM integration supplies firmware updates and lifespan monitoring.

Setup Instructions

How to Install the Synology SAT5221-480G

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.