RSS639 JBOD Rugged 6U Storage System

  • Designed to MIL-STD 810, 167-1, 461 and MIL-S-901
  • Up to 39 top-loading, hot-swappable, rugged HDD
  • NAS capable - 78 terabyte total capacity
  • 20" depth 

RSS639 Rugged 6U Storage System

  • Rugged 6U, rack mounted 20" depth
  • Rear I/O offers four (4) SFF-8088 SAS connections
  • Offers maximum airflow with six (6) high speed, high volume low noise fans
  • Versatility with up to thirty-nine (39) 2.5" or 3.5" HDDs
  • All aluminum construction - 160-175 lbs.
  • Easily mounted on Jonathan rails


 ** If you are logged in please click on the Documents tab to view our documentation for this product.

Compact and Powerful
In an industry where 28 chassis depths are common, Crystal Group provides a server that is 20” deep with the latest Intel processing capabilities. With an all-aluminum chassis weighing in at 160-175 lbs., the RSS639 provides high capability. Don’t wait for the next “rugged” Intel architecture when you can make your programs successful now! Be a leader!

Rugged and Dependable
Using our expertise in Avionics design and development, we’ve created the next generation in rugged computing. This game-changing technology provides enhanced compute power in the harshest of environments. We do not just design to these standards, we actually test to them. When we put our name on the RSS639, you can be sure it is both rugged and dependable. Put your trust in us!

High Reliability at a Fraction of the Cost
Innovative packaging techniques and attention to the important details makes our product run cooler and perform at wider temperature extremes. Design approach limits deflection and extends circuit board solder joint life. We provide incredible processing power, in a rugged package, with exceptional life at a fraction of the cost. Unrivaled in the industry!

Testing Standards *register to download for certification reports

Operational Temperature, MIL-STD-810, Method 501,
Procedure I/II

-15°C to +55°C,
-40°C with Solid State Drive

Storage, MIL-STD-810, Method 501, Procedure I/II -55°C to 85°C
Humidity, MIL-STD-810, Method 507 240 hours with humidity kit
Altitude, MIL-STD-810, Method 500 12,500ft operation, 40,000ft transport
Vibration, MIL-STD-810, Method 514, Procedure I 2 GRMS, 5-500Hz, 75 min/axis
MIL-S-901, Grade B, Class 2, Type B Grade A with solid state drives

Mechanical (6U) 


10.5” (26.67cm)


17.75” (45.1cm)


20” (51.12cm) 


160-175 lbs (72.58-79.38 kg)

External Bays (39) 

Thirty-nine (39) top-loading, hot-swappable, rugged 2.5” or 3.5” HDDs


Six (6) High speed, high volume, low noise fans


Jonathan rails

Power Supply

120/240VAC 1350W N+1 W/PFC

* Crystal Group designs all storage systems to meet or exceed the specifications listed herein. Due to the sheer number of models and combinations of components, it is not practical to test every combination of systems offered. Please ask your Crystal Business Development Manager for data on qualification testing for configurations similar to the desired configuration for your application.


Supporting Documentation Download
RSS639 - Spec Sheet download
More Documentation Download
RSS639 Storage System- Outline Installation Drawing download
RSS639 Hardware Guide download