Synology RX1222sas 12-Bay Expansion Enclosure

Overview

The Synology RX1222SAS is a 12-bay rackmount expansion enclosure designed to extend the storage capacity of Synology SA3600 or SA3400 NAS systems without downtime. It supports both 3.5-inch and 2.5-inch SAS or SATA drives, allowing a flexible mix of high-capacity hard drives and high-speed solid-state drives. The enclosure fits into a 2U rack slot and includes dual 500 W power supplies for reliable operation and automatic failover protection.

This unit is ideal for businesses that need to scale storage smoothly, whether for backups, media workflows, or virtualization clusters. Its integration with Synology DSM Storage Manager ensures familiar and unified management, while hot-swappable components minimize service interruptions.

Key features

• Twelve drive bays that accept both 2.5-inch and 3.5-inch SAS or SATA drives, enabling flexible storage configurations.
• Hot-swappable drives, cooling fans, and power supplies allow maintenance and upgrades without shutting down services.
• Dual 500 W power supplies provide automatic failover to maintain continuous operation in case of a power unit failure.
• Includes two Mini-SAS HD cables and two AC power cords for straightforward and quick installation.
• Supports stacking of up to seven expansion units, allowing large-scale storage growth without infrastructure overhaul.
• Quiet operation at 54.5 dBA, suitable for typical equipment rooms without excessive noise disruption.
• Fully managed through Synology DSM Storage Manager, simplifying volume creation, expansion, and redundancy setup.
• Lightweight chassis at 29.8 pounds, making installation manageable for a two-person team.
• Five-year hardware warranty offers long-term peace of mind and reliability assurance.

Key specs

• Drive bays: 12 (supports 2.5-inch and 3.5-inch SAS or SATA drives)
• Power supplies: Dual 500 W with automatic failover
• Rack size: 2U
• Weight: 29.8 pounds
• Noise level: 54.5 dBA
• Included cables: Two Mini-SAS HD cables, two AC power cords
• Expansion support: Up to seven RX1222SAS units stacked
• Warranty: Five years

Connectivity and compatibility

The RX1222SAS connects to Synology SA3600 or SA3400 NAS units via two Mini-SAS HD cables, ensuring high-speed and reliable data transfer. This direct connection method simplifies setup and integration, making it feel like adding a new component rather than a complex upgrade. The enclosure supports both SAS and SATA drives, providing compatibility with a wide range of storage media to suit different performance and capacity needs.

Installation and setup

Installation is designed to be straightforward and efficient. The enclosure fits into a standard 2U rack slot and includes all necessary cables for immediate connection. Hot-swappable drives, fans, and power supplies allow you to perform maintenance or upgrades without interrupting data services. The manageable weight and slide-out components make it practical for IT teams to handle installation and routine servicing with minimal effort.

Ideal uses and environments

This expansion enclosure is well suited to businesses that require scalable storage solutions without disrupting ongoing operations. It works well in environments such as data centers, media production studios, and virtualization clusters where continuous access to data is critical. The quiet operation and compact rack size make it a good fit for typical server rooms, while the ability to stack multiple units supports growing storage demands over time.