The 2.5" Disk Array BPU-128DE-SS, the Disk Array to be set up in various configurations: as RAID 0, RAID 1, RAID 5 or JBOD, as individual drive, or whatever the mix that best fits the application. The Disk Array can start with as little as one hard drive and then expands as needed. Hard Drive can also be removed or added to the system without turning off your system power or restarting your computer.