Jbod Mode：

This mode combines 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. Hard drive A and B are combined 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. It is also possible to create a JBOD volume using only a single hard disk drive connected to Port 0, and then increase the storage capacity of the volume later by adding another hard disk drive to Port 1 and pressing reset button. The new disk blocks of Port 1 will be combined to the end of the disk blocks of Port 0, and any data that is stored on the existing JBOD volume will be preserved. However, it is not possible to expand an existing JBOD volume by adding another hard disk drive to Port 0 and still preserve any existing data on that volume.

( Figure 8-C ), ( Figure 8-D )

JBOD Mode

( Figure 8-C )

	J B O D
	500GB

N S T-400M X -S R
P ort 0	P ort 1

D rive A	D rive A

250G B250G B

Equal hard drives

( Figure 8-D )

JBO D 1000GB

NST- 400M X-SR
Port 0	Port 1
D rive A	D rive A

250G B750G B

U nequal hard drives

RAID Mode Selection