Volume Relationship Diagram - proavio RS16FS User Manual

RS16 FS – Manual v.6.1A

1.4 Volume relationship diagram

LUN 1 LUN 2 LUN 3
Snap
VD 1 VD 2
VD
+
+
+
RG Dedicated
Global CV
CV
PD 1 PD 2 PD 3 DS
RAM
Figure 1.4.1
This is the volume structure of ULTRASTOR 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 memory size by user's modification/setting. LUN (Logical Unit Number) is
a unique identifier, in which users can access through SCSI commands.
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