Synology 3.84GB SAT5221 SATA IIÂ I 2.5″ Internal SSD – SAT5221-3840G
Description
The Synology SAT5221-3840G is an enterprise-grade 2.5″ SATA III SSD with 3.84 TB capacity and a slim 7 mm profile. Engineered for Synology systems, it delivers consistent, low-latency performance under mixed 24/7 workloads and integrates seamlessly with DiskStation Manager environments.
Performance Specifications
| Metric | Specification |
|---|---|
| Sequential Read (128 KB, QD32) | 500 MB/s |
| Sequential Write (128 KB, QD32) | 500 MB/s |
| Random Read (4 KB, QD32) | 90,000 IOPS |
| Random Write (4 KB, QD32) | 30,000 IOPS |
Sustained performance is measured in steady-state, SNIA-compliant test environments to ensure reliability under heavy mixed workloads.
Endurance & Reliability
| Attribute | Specification |
|---|---|
| Endurance (TBW) | 7,000 TB written |
| MTBF | 1.5 million hours |
| UBER | < 1 sector per 1017 bits read |
| Power-Loss Protection | Onboard capacitors flush in-flight data |
| Warranty | 5 years (or until TBW is reached) |
Built for intensive enterprise usage, the SAT5221-3840G features end-to-end data protection and power-loss protection circuitry to prevent data corruption during outages.
Power & Thermal
| Condition | Power Consumption | Notes |
|---|---|---|
| Active Read (Typ.) | 4.5 W | |
| Active Write (Typ.) | 5 W | |
| Idle | 1.2 W | May vary by system configuration |
| Operating Temperature | 0 °C to 70 °C | |
| Storage Temperature | –40 °C to 85 °C |
Thermal design supports dense, high-performance deployments while maintaining low idle power draw to extend SSD lifespan.
Physical & Compatibility
| Attribute | Specification |
|---|---|
| Form Factor | 2.5″ × 7 mm |
| Interface | SATA III 6 Gb/s |
| Compatible Series | SAT5210, SAT5221, SAT5222, SAT5230 series |
| Validation | Fully tested and qualified for Synology systems |
Synology SAT5200 series SSDs are thoroughly validated with each DSM update and engineering change to ensure plug-and-play compatibility and firmware integrity.
Key Features
- Designed for Synology NAS systems: seamless DSM integration and firmware management.
- Stable high performance: consistent 500 MB/s sequential throughput and high 4 KB random I/O.
- Enterprise-grade endurance: 7,000 TBW rating with 1.5 million-hour MTBF.
- End-to-end data protection: metadata checksums and power-loss protection to guard against corruption.
- One-click firmware updates: automatic notifications and install via DSM minimize maintenance.
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