Fantec MR-35DU3 User Manual page 17

BIG
The BIG storage policy concatenates a series of physical hard drives as a single large
volume; resulting in a seamless expansion of virtual volumes beyond the physical
limitations of singularly connected hard drives. BIG storage policy delivers maximum
storage space without a single large capacity and costly hard drive.
Hard drive A and B are concatenated into a single virtual volume in the Figure below
with a storage capacity that is equal to the sum of each of the physical hard drives A
and B.
JBOD
The JBOD (Just a Bunch of Disks) storage policy enables each hard drive to be seen
separately as one drive. JBOD storage policy is for a standalone (non-cascaded)
Storage Processor or the top-level node of a cascaded configuration, but not for
subordinate nodes. In a JBOD configuration, each physical drive is directly exposed.
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