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1.4 Volume relationship diagram
Figure 1.4.1
This is the volume structure of
Netstor
designed. It describes the relationship
of RAID components. One VG (Volume Group) consists of a set of UDVs
(User Data Volume) and owns one RAID level attribute. Each VG can be
divided into several UDVs. The UDVs in one VG share the same RAID level,
but may have different volume capacity. Each UDV 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.
VG
PD 2
PD 3
DS
PD 1
UDV 1
UDV 2
Snap
UDV
RAM
Global CV
Dedicated
CV
+
LUN 1
LUN 2
LUN 3
+
+
