For system validation and quality assurance purposes, system configurations require a minimum of 25% of the available drives be populated with validated Supermicro drives. Please contact your Supermicro sales rep for validated HDD. Extreme High Density and High Capacity Storage Chassis support 45 x 3.5" Top Loading SAS/SATA 12Gb/s Hot Swapping HDD/SSD Bays Tool-less HDD tray with HDD LED indicator Single Expander Backplane Boards support SAS3/2 HDDs with 12Gb/s throughput 4 x Mini-SAS HD ports for Internal / External Cascading Expander Combination for high performance, high availability or high redundancy requirements 1x IPMI port for Remote System Power on/off and system monitoring Support NTP for time synchronization & RTC battery backup 1600W (1+1) Redundant High-efficiency Platinum Level Power Supplies Optimized cooling w/ 5x 80x38mm rear hot-swap fans Support front LCD panel for system status & error info (Option) Ideal for Cloud backup, data Replication or High density Archive Storage Applications Qualified SAS HBA / controller: AOC-SAS3-9300-8E - 12Gb/s 2-external ports SAS3 HBA AOC-SAS3-9380-8E - 12Gb/s 2-external ports SAS3 RAID Controller