The TowerRAID TR8M+B is a compact RAID tower utilizing the latest SATA II port multiplier technology where two eSATA cable connects to eight SATA hard drives. Bundled with a high performance PCIe 2.0 x1 RAID controller card RR622, its RAID 5 performance is capable of reaching over 250MB/s. Online expansion is a feature included in the controller card which allows the RAID to be expanded without the need to recreate the storage space or erase the existing data. Advanced monitoring functions include real time hard drives health status and e-mail notification for critical events. Designed with easy installation in mind, the TR8M+B is designed with eight hot-swappable tray modules so that hard drives could be removed and installed with ease. The included dual-port eSATA 6Gb/s PCIe 2.0 x1 RAID controller card allows the connection of eight harddrives using only two cables, while all drives could be configured into a single or multiple RAID arrays, providing over 200MB/s in performance.