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iStarUSA’s
iSCSI solution is the most cost-effective disk array controller with
completely integrated high-performance and data-protection capabilities which
meet or exceed the highest industry standards, and
the best data solution
for small/medium business (SMB) users.
1.2 Terminology
The document uses the following terms:
RAID
RAID is the abbreviation of
“R
edundant
A
rray of
I
ndependent
D
isks
”
. There are different RAID levels with different degree
of the data protection, data availability, and performance to
host environment.
PD
The
P
hysical
D
isk belongs to the member disk of one specific
volume group.
VG
V
olume
G
roup. A collection of removable media. One VG
consists of a set of UDVs and owns one RAID level attribute.
UDV
U
ser
D
ata
V
olume. Each VG could be divided into several
UDVs. The UDVs from one VG share the same RAID level,
but may have different volume capacity.
CV
C
ache
V
olume. Controller uses onboard memory as cache.
All RAM (except for the part which is occupied by the
controller) can be used as cache.
LUN
L
ogical
U
nit
N
umber. A logical unit number (LUN) is a unique
identifier which enables it to differentiate among separate
devices (each one is a logical unit).
GUI
G
raphic
U
ser
I
nterface.
RAID width,
RAID copy,
RAID width, copy and row are used to describe one VG.
E.g.:
