
1.4 Volume relationship diagram
Figure 1.4.1
This is the volume structure Addonics designed. It describes the relationship of
RAID components. One RG (RAID group) consists of a set of VDs (Virtual disk)
and owns one RAID level attribute. Each RG can be divided into several VDs.
The VDs in one RG share the same RAID level, but may have different volume
capacity. Each VD will be associated with one specific CV (Cache Volume) to
execute the data transaction. Each CV can have different cache memor y size by
user’s modification/setting. LUN (Logical Unit Number) is a unique identifier , in
which users can access through SCSI commands.
PD 2 PD 3 DS PD 1
VD 1 VD 2
VD
CV
d CV
Formatted
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