RM21-308 
    
 
    - Backplane support for 8 port SAS / SATA drives and 12 Gb/s Mini-SAS SFF-8087***
 - Supports eight 2.5"/3.5" SAS/SATA HDD/SSD
 - Includes three 80 x 15mm PWM fans
 - Independent drive status LED
 - Supports Micro ATX motherboards
 - Supports four low profile PCI / PCIe slots
 - Auto lock handle for easy to fixed the 2U rackmount on the cabinet
 
| Model No. | SST-RM21-308 | 
|---|---|
| Motherboard | Micro ATX (9.6" x 9.6"), Mini-ITX(6.7" x 6.7") | 
| Drive Bay - External | 3.5" or 2.5" HDD/SSD hot-swap x 8 | 
| Drive Bay - Internal | 2.5" x 2 (up to 15mm), slim optical x 1 (up to 12.7mm) | 
| Power Supply | 2U single or 2U redundant / PS2 (ATX) up to 220mm deep and 86.3mm height (not included) | 
| Expansion Slot | Low profile PCI / PCIe x 4 | 
| Front buttons | Power On / Off, system reset | 
| HDD Tray | HDD Power LED x 8: Yellow , HDD Access x 8: Blinking green | 
| Chassis form factor | 2U | 
|---|---|
| Main metal thickness | 1mm | 
| HDD backplane | 8 ports SAS / SATA to Mini-SAS SFF-8087 x 2 | 
| HDD Interface | SAS-1 / SAS-2 / SAS-3,SATA-1 / SATA-2 / SATA-3 | 
| Limitation of CPU cooler | 68mm | 
| Front I/O Port | USB 2.0 x 1, USB 3.1 Gen 1 Type-A x 1** | 
| Indicators | Chassis : Power LED x 1: Blue, HDD Access x 1: Green, LAN LED x 2: Green | 
| Dimension | 430mm (W) x 88.5mm (H) x 480mm (D) 18.3 Liters | 
**RM21's USB internal cable is 800mm long, so if you are connecting an external enclosure to the USB 3.1 port, we recommend using it with shorter cables to prevent performance loss.
***Mini-SAS HD (SFF8643) to Mini-SAS (SFF8087) cable and 12 Gb/s SAS HD card required for 12 Gb/s performance. (e.g. SilverStone CPS06 & ECS05)
 































