3x 5.25" to 4x 3.5" 2.5" 12Gb/s HDD SSD Hot-swap Rack Stylish aluminum color handle and heat-sink body Support Hot-Swap & RAID Configuration (need an additional RAID controller) Aluminum Design with Conductive Dissipation Grooves Power, fan and high temperature LED indicators High Performance Transfer Rate up to 12Gb/s Supports Both 2.5" and 3.5" SAS I/II/III & SATA I/II/III HDD/SSD Equipped with Fan Speed Control Switch 14TB Hard Drives Compatible Product Introduction High level Raid and high availability storage in compact design, BPU-340HD series adds extra storage and hot-swap capability to satisfy any application needs. Aluminum body and extra 80mm cooling fan subsystem complete a high end data storage server or workstation. High density multi-disk storage backplane that allows multiple four 3.5" SAS/SATA hard drives to be mounted into three standard 5.25" drive bays. BPU-340HD supports RAID 1/0/1+0/5 configuration for high performance or redundancy data application. Aluminum construction provides best heat dissipation required for high performance SAS/SATA drives, is designed with excellent front to back vent airflow. Applications: Digital Audio Editing,Video Editing (SD or HD), Security System, SOHO SMEs With Limit HDD Tray and Data Protection or Disk-to-Disk Backup.