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Server RAID System [ R2-RAID ] User Manua
11
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BIG MODE：It
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. 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.
It is also possible to create a BIG 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 concatenated to the end of the
disk blocks of Port 0, and any data that is stored on the existing BIG volume
will be preserved. However, it is not possible to expand an existing BIG
volume by adding another hard disk drive to Port 0 and still preserve any
existing data on that volume.
Drive A
250GB
HD3206SRD
Port 0 Port 1
Big
500GB
＋
Drive A
250GB
Equal hard drives
Drive A
250GB
HD3206SRD
Port 0 Port 1
Big
1000GB
＋
Drive A
750GB
Unequal hard drives