Fujitsu Eternus DX90 - LUN Concatenation; Figure 1.16 Example for Use LUN Concatenation

Chapter 1 Overview
> 1.3 Functions
ETERNUS DX60/DX80/DX90 Disk storage system User Guide
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1.3.6 LUN Concatenation
LUN concatenation is a function that is used to add new area to a volume and so expand the
volume capacity available to the server. This function enables the reuse of leftover free area in a
RAID group and can be used to solve capacity shortages.
The following example shows the concatenation of an unused area of a different RAID group into
LUN2, in order to expand LUN2's capacity to 900GB.
Figure 1.16 Example for use LUN Concatenation
300GB 300GB 300GB 300GB
LUN0 600GB
LUN2 300GB
RAID5(3+1)
300GB 300GB 300GB 300GB
Unused area 600GB
LUN1 300GB
RAID5(3+1)
300GB 300GB 300GB 300GB
LUN0 600GB
RAID5(3+1)
300GB 300GB 300GB 300GB
LUN1 300GB
RAID5(3+1)
LUN2 900GB