2U 12-bay 2.5" / 3.5" HDD / SSD rackmount storage chassis with Mini-SAS HD SFF-8643 12 Gb/s interface
  • Backplane support for 12 port SAS / SATA drives and 12 Gb/s Mini-SAS HD SFF-8643 + SGPIO
  • Supports twelve 2.5"/3.5" SAS/SATA HDD/SSD hot-swap trays
  • Includes three 80mm x 38mm hot-swappable PWM fans
  • Independent drive status LED
  • Supports E-ATX or SSI-EEB motherboards
  • Supports 7 low profile PCI / PCIe slots
Distinctive exterior Distinctive exterior
Distinctive exterior
Distinctive front panel features 12 x hot-swappable 3.5\" bays or 12 x hot-swappable 2.5\" bays with handle bars allowing for easy accessibility to the internal components
Storage device performance Storage device performance
Storage device performance
HDD backplane supports 12 ports SAS / SATA drives and 12Gb/s Mini-SAS HD SFF-8643 x 3 with SGPIO
Cooling capabilities Cooling capabilities
Cooling capabilities
Utilizing the typical front-to-back directional airflow, RM22-312 comes pre-installed with three 80mm x 38mm hot-swappable PWM fans, designed to achieve a rapid heat dissipation effect that does not easily accumulate hot air inside
Internal configurations Internal configurations
Internal configurations
Sliding rail compatibility Sliding rail compatibility
Sliding rail compatibility
Reserved mounting holes for sliding rails which can be easily installed. Can be used with RMS03-26 rail
Product Specifications
Model No.
Drive Bay
  • 3.5" hot-swap x 12
  • --
Power connector on HDD backplane
4-Pin peripheral x 2
Expansion Slot
Low profile PCI / PCIe x 7
Front I/O Port
USB 3.1 Gen 1 Type-A x 2 **
Power Supply
2U single or 2U redundant (not included)***
Net Weight
10.9 kg
430mm (W) x 88.5mm (H) x 660mm (D), 25.1 Liters
Chassis form factor
Front buttons
Power On / Off, system reset
Power LED x 1: Blue
HDD Access x 1: Green
LAN LED x 2: Green

HDD Tray
HDD Power LED x 12: Yellow
HDD Access x 12: Blinking green
HDD backplane
12 ports SAS / SATA to Mini-SAS HD SFF-8643 x 3 with SGPIO
HDD Interface
Main metal thickness
Limitation of CPU cooler
* Compatible with tool-less rail slide - RMS03-26
** RM22-312’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
***Please make sure the mounting holes of your 2U PSU matches the mounting holes on the rear panel of RM22-312 (See below diagram)

File Download
RM22-312 backplane user guide
File Size
242.34 KB
RM22-312 manual
File Size
2.71 MB
RM22-312 High resolution photos
File Size
11.21 MB
RM22-312 Product Sheet (RM22-312-Product_Sheet-EN.pdf)
File Size
582.60 KB
Q & A
The connection between the backplane and the motherboard or the host control card is only a SATA data transmission cable. This cable does not contain the control signal of the LED. Therefore, in the definition of SATA HDD, SATA Power Pin11 is reserved for the staggered spinup/activity indication of the HDD. The HDD backplane of any NAS or server chassis is based on this specification as the indicator light of the HDD.
If your HDD tray cannot display this LED light, we recommend to check with HDD manufacturer if your HDD has a reserved LED signal that can be driven by SATA power pin11.
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