- 7 -
users could access by using the SCSI commands.
GUI
G
raphic
U
ser
I
nterface.
RAID width,
RAID copy,
RAID row
(RAID cell in
one row)
RAID width, copy and row are used to describe one VG.
E.g.:
1. One 4-disk RAID 0 volume: RAID width= 4; RAID
copy=1; RAID row=1.
2. One 3-way mirroring volume: RAID width=1; RAID
copy=3; RAID row=1.
3. One RAID 10 volume over 3 4-disk RAID 1 volume:
RAID width=1; RAID copy=4; RAID row=3.
WT
W
rite-
T
hrough cache write policy. Each data is synchronized
in both data cache and the accessed physical disks.
WB
W
rite-
B
ack cache write policy. Will speed up system write
performance but needs to bear the risk where data may be
inconsistent between data cache and the physical disks in one
short time interval.
RO
Set the volume to be
R
ead-
O
nly.
DS
D
edicated
S
pare disks. The spare disks only belong to one
specific VG. Others could not use the spare disks for any
rebuilding purpose.
GS
G
lobal
S
pare disks. If some VGs are using the global spare
disks to do rebuilding, they could get the spare disks out from
the common spare disks pool for such requirement.
DC
D
edicated
C
ache.
GC
G
lobal
C
ache.
DG
D
e
G
rade mode.
S.M.A.R.T.
S
elf-
M
onitoring
A
nalysis and
R
eporting
T
echnology.
WWN
W
orld
W
ide
N
ame.
HBA
H
ost
B
us
A
dapter.
