- Cost-effective High-density 3U JBOD chassis solution: Total 28x (16 front + 12 rear) 3.5" Hot-swap HDD bays; 6Gb/s SAS2 Expander Backplane- Cost effective HDD Backplane design: Dual expander chip for front/rear HDDs Dual (E26) expander solution- High-Availability Features: Redundant, Hot-pluggable cooling system, Power Supplies, Hot-swap drives, and Redundant Expander Backplane- Redundant 1620W Platinum Level power supplies- 3x 8cm Hot-swap cooling fans, redundant cooling