JBOD (Non-RAID): The two physical disks read as two independent hard drives in a single housing, so that two logical volumes mount on the desktop. Therefore, the computer will show two separate drives.
Note: The failure of one disk will not affect the other disk. Therefore, the data on the working drive will be intact and functioning.
BIG (Concatenation): The two physical drives are combined so that one single yet larger logical volume mounts on the desktop, offering maximum possible capacity (the available capacities of each disk are combined).
Note: If one physical disk fails, the data on both disks will become inaccessible. If you are concerned about data security, we highly recommend using Safe configuration (RAID 1 mode).
Fast (RAID 0 Mode): The two physical drives are stripped together so that one larger logical volume mounts on the desktop, offering the maximum possible capacity like in Big mode (the available capacities of each disk are combined) yet with greater speed than the Big mode (the speed of each disk runs faster to a certain level).
Note: If one drive fails, the data on both disks will become inaccessible.
Safe (RAID 1 Mode): The two physical drives are “mirrored” (RAID 1) so that one single logical volume mounts on the desktop. All of the data on one drive will be recoverable from the other drive (the available capacity of one drive cannot exceed the available capacity of the other drive).
Note: If one physical disk fails, the data can be immediately recovered from the second disk. No data will be lost if one drive fails.