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BIG Mode (JBOD or Spanning):
BIG model, in this mode, 2 hard disks will simply be bound for
one, the merger hard drive performance and literacy speed will
be same as single block of hard disk, the total capacity of the
portable hard disk equal to the sum of 2 hard drives of
capacities. Once writing data, the system specify date and start
storage from the first disk, when the storage space of the first
disk use up, the data will start be stored from the back disk in
turns. If the data in the first disk appears damaged, all of the
data in the two hard disks will be totally lost.
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FAST Mode(Striping):
FAST mode it's also our familiar RAID 0 mode. In RAID 0 state,
data storage is divided into two parts, respectively in two hard
