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Silver 2U rackmount chassis with four hot-swap drive bays

Silverstone Technology

Silverstone Technology RM21-304 2U Server Chassis 4×3.5" Hot-Swap

SKU CH-Z6FH-RCPAB

2U rack-mount chassis holds four hot-swap 2.5″ or 3.5″ SAS/SATA drives with 6 Gb/s mini-SAS backplane, three 80 mm PWM fans and Micro-ATX support

  • Chassis styleDesktop
  • 4 hot-swap bays accept 2.5" and 3.5" SAS/SATA drives
  • 6 Gb/s mini-SAS SFF-8087 backplane for high-speed storage
  • Three 80 mm PWM fans deliver targeted cooling
  • Micro-ATX motherboard support fits compact server builds
  • Tool-less rail kit enables quick 2U rack installation

Silverstone RM21-304 2U Server Chassis

The Silverstone RM21-304 is a 2U rackmount server chassis built for professional storage environments. It supports Micro-ATX motherboards and includes three 80 x 15mm PWM fans for cooling. The chassis accommodates both 2U single and 2U redundant PS2 (ATX) power supplies. Tool-less rail mounts simplify installation into standard cabinets.

Suits storage builds needing hot-swap SAS

This chassis suits builders creating compact storage servers with up to four hot-swap drives. It is not for systems requiring more than four drive bays or full-height PCIe expansion slots. Low-profile cards are the only expansion option supported.

Backplane with 6 GB/s mini-SAS SFF-8087

The integrated backplane connects four 2.5" or 3.5" SAS/SATA drives via a 6 GB/s mini-SAS SFF-8087 interface. Each bay features independent drive status LEDs and auto-lock handles for secure mounting. This backplane design determines the maximum drive count and interface speed available.

How it compares

Measured against everything we stock in Rackmount Server Cases, at today’s prices. Recalculated every night.

Price $489.99
Pricier than about 81% of the 1,006 comparable items (median $222.49).

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Specifications

Size & build
Chassis styleDesktop

Questions about this item

How can I confirm the four drive bays are communicating with the backplane after installing the drives?

Each bay has an independent drive status LED that shows activity and health for the installed SAS or SATA drive.

What cooling and mounting hardware are included, and what must I supply separately?

The chassis includes three 80 mm PWM fans and tool-less rails for rack mounting; you must add a Micro-ATX motherboard, a PS2 or redundant power supply, and the drives.

Which drive sizes and interface speeds does the backplane support for the four hot-swap bays?

The backplane accepts both 2.5" and 3.5" SAS or SATA drives and connects through a 6 Gb/s mini-SAS SFF-8087 link.

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