Seagate
Seagate Cheetah NS ST3400755SSProduct 400 GB 3.5" SAS internal hard drive
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Synology Inc.
Synology RS3626xs Xeon D-1726 12-bay rackmount NAS 16GB 3.2TB cache 192TB
A 12-bay rackmount NAS with Xeon processor, 16GB DDR4 memory, 3.2TB cache and 192TB of SATA drives, fully assembled and tested
- Port RJ-452 x RJ-45 10GbE LAN Port 1 x Out-of-Band Management LAN Port
- Port USB2 x USB 3.2 Gen 1 Ports
- Form Factor12-Bay
- ProcessorIntel Xeon
- Installed Memory16GB
- Included HDD Capacity192TB (12 x 16TB)
- Intel Xeon D-1726 6-core processor handles demanding business workloads
- 16GB DDR4 ECC memory expandable to 48GB for virtualization and multi-site collaboration
- Dual 10GbE RJ-45 ports with Link Aggregation deliver sequential reads over 6,300 MB/s and writes over 3,700 MB/s
- 2TB Synology Enterprise SSD cache accelerates frequent data access across twelve drive bays
- 192TB raw capacity from twelve 16TB Synology Enterprise NAS drives fully assembled and tested
Purpose-built 12-bay rackmount NAS
The Synology RS3626xs is a 2U rackmount network-attached storage server equipped with twelve drive bays, a 6-core Intel Xeon D-1726 processor, 16 GB of DDR4 ECC memory, 3.2 TB of enterprise SSD cache, and 192 TB of pre-installed Synology enterprise hard drives. It targets organisations that need a fully assembled, high-capacity platform for centralised file storage, virtualization, backup, and surveillance workloads. Buyers who require more than twelve bays or a different processor class should consider alternative chassis configurations.
Thermals, noise and power draw
The unit operates from a 100-240 VAC 50/60 Hz supply with redundant power supplies fitted as standard. Synology specifies an operating temperature range of 0 °C to 35 °C and a humidity range of 8 % to 80 % RH. The 2U form factor measures 88 mm high, 482 mm wide and 724 mm deep, weighing 14.5 kg when fully populated. No acoustic or typical power-consumption figures are published by the manufacturer.
Sustained-load behaviour
Under Synology test conditions the system achieves sequential read throughput above 6,300 MB/s and sequential write throughput above 3,700 MB/s using the integrated 10 GbE RJ-45 ports with link aggregation. Two PCIe Gen 4 x8 slots remain available for additional network adapters, Fibre Channel cards or further cache devices if workloads demand expanded I/O bandwidth. The platform supports memory expansion up to 48 GB and can scale raw capacity beyond the factory 192 TB through compatible expansion units.
Highlights
- Intel Xeon D-1726 6-core processor handles demanding business workloads
- 16GB DDR4 ECC memory expandable to 48GB for virtualization and multi-site collaboration
- Dual 10GbE RJ-45 ports with Link Aggregation deliver sequential reads over 6,300 MB/s and writes over 3,700 MB/s
- 2TB Synology Enterprise SSD cache accelerates frequent data access across twelve drive bays
- 192TB raw capacity from twelve 16TB Synology Enterprise NAS drives fully assembled and tested
Specifications
| Brand | Synology |
|---|---|
| Model | RS3626xs |
| Port RJ-45 | 2 x RJ-45 10GbE LAN Port 1 x Out-of-Band Management LAN Port |
| Port USB | 2 x USB 3.2 Gen 1 Ports |
| Form Factor | 12-Bay |
| Processor | Intel Xeon |
| Installed Memory | 16GB |
| Included HDD Capacity | 192TB (12 x 16TB) |
| Management | Web-Based, DHCP Client |
| LEDs | Power, HDD (Hard Disk Drive), LAN (10/100) |
| Power | 100-240 VAC 50/60Hz |
| Temperature | 0°C to 35°C (32°F to 95°F) |
| Humidity | 8% to 80% RH |
| Dimensions | 88 mm × 482 mm × 724 mm |
| Weight | 14.5 kg |
| Package Contents | Main Unit × 1 Accessory Pack × 1 C13 to C14 power cord × 2 Front Cover × 1 All Configuration Items |
Questions about this item
How do I install the 12-bay RS3626xs in a rack and what step is often missed?
Mount the 2U chassis using the included rails, connect both C13-to-C14 power cords for redundancy, link the two 10GbE RJ-45 ports and the out-of-band management port, then run the web-based setup; the step often missed is enabling Link Aggregation on the switch so both 10GbE ports actually share traffic.
What maintenance or replacement will the RS3626xs need later?
The twelve 16 TB SATA drives and the two 1.6 TB cache modules are the field-replaceable parts; drives can be swapped one at a time while the system runs, and cache modules slot into the PCIe Gen 4 x8 bays when they reach their write-endurance limit.
What limit appears first on the RS3626xs during sustained heavy workloads?
The installed 16 GB DDR4 ECC memory caps at 48 GB, so memory pressure arrives before the Xeon D-1726 hits its thermal ceiling of 35 °C; adding DIMMs is the first upgrade needed for long-running virtualization or heavy caching.
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