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SilverStone SST-RM21-308 2U 8-Bay Micro-ATX Mini-ITX 12Gb/s SAS/SATA Rackmount Server Chassis

SilverStone SST-RM21-308 2U 8-Bay Micro-ATX Mini-ITX 12Gb/s SAS/SATA Rackmount Server Chassis

The SilverStone SST-RM21-308 is a high-density 2U rackmount chassis designed for professional storage and server applications, featuring an 8-bay hot-swap backplane with 12Gb/s Mini-SAS SFF-8087 support. It provides a reliable foundation for Micro-ATX or Mini-ITX builds, ensuring efficient cooling a


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Description

The SilverStone SST-RM21-308 represents a sophisticated leap in compact server infrastructure, offering a robust 2U form factor that maximizes storage density without compromising thermal performance. Engineered for high-speed data throughput, its integrated backplane supports eight 2.5-inch or 3.5-inch SAS/SATA drives via 12Gb/s Mini-SAS SFF-8087 interfaces. This chassis bridges the gap between consumer-grade flexibility and enterprise-grade reliability, featuring auto-locking handles for secure rack mounting and a streamlined internal layout optimized for Micro-ATX and Mini-ITX motherboards.


This product is for:
- Small to Medium Business (SMB) IT managers seeking a scalable, high-density storage solution for local file hosting or backup.
- Home Lab enthusiasts and Prosumers building custom NAS (Network Attached Storage) units with high-speed SAS drive requirements.
- System integrators specializing in edge computing or industrial automation where 2U rack space is at a premium.
- Creative professionals needing a rack-mounted workstation for high-capacity media asset management and video editing scratch disks.
- Data center operators requiring reliable, hot-swappable drive bays for distributed storage nodes or virtualization clusters.

Detailed specifications:
- Form Factor: 2U Rackmount
- Motherboard Compatibility: Micro-ATX (9.6" x 9.6"), Mini-ITX (6.7" x 6.7")
- Drive Bays: 8 x Hot-swappable 3.5" or 2.5" SAS/SATA
- Backplane: 2 x SFF-8087 connectors (4 ports per connector), 12Gb/s bandwidth support
- Cooling System: 3 x 80mm x 15mm PWM fans
- Expansion Slots: 4 x Low Profile PCI / PCIe slots
- Indicators: Power status, HDD activity, 2x LAN activity, System overheat, Fan failure
- Dimensions: 430mm (W) x 88.5mm (H) x 480mm (D)

Deploying the SST-RM21-308 is a seamless experience for technicians, thanks to the intuitive internal layout and the inclusion of three 80mm PWM fans that maintain consistent airflow across the drive array. The independent LED indicators provide immediate visual feedback on drive health, which is critical for minimizing downtime during maintenance. The auto-locking handles simplify the installation process into standard server racks, ensuring the unit remains securely seated even in high-vibration environments. The 12Gb/s backplane ensures that modern SSDs and high-capacity HDDs can operate at their peak performance levels without interface bottlenecks.

Compared to standard 4U chassis, the SST-RM21-308 offers a significantly smaller footprint while maintaining the same 8-bay capacity found in many larger units. While 1U alternatives often struggle with thermal management and limited expansion, this 2U design allows for four low-profile PCIe slots and larger 80mm fans, striking an ideal balance between space-saving and hardware compatibility. Unlike generic rackmount cases, SilverStone’s inclusion of a high-speed Mini-SAS backplane eliminates cable clutter, improving both airflow and signal integrity compared to individual SATA cable configurations.

Q&A:
- Does the SST-RM21-308 support 12Gb/s SAS drives? Yes, the backplane is designed to support 12Gb/s Mini-SAS SFF-8087 interfaces, ensuring compatibility with high-speed SAS and SATA drives.
- What motherboard sizes can I install in this 2U chassis? This model is compatible with Micro-ATX and Mini-ITX motherboards, providing flexibility for various server configurations.
- Are the drive bays hot-swappable? Yes, the eight front-loading bays are designed for hot-swapping, allowing for drive replacement without powering down the entire system.
- Can I use full-height PCIe cards in this case? No, the SST-RM21-308 supports up to four low-profile (half-height) PCI or PCIe expansion cards.
- What type of power supply is required? The chassis is designed to accommodate standard 2U single or redundant power supplies, depending on your specific uptime requirements.
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