3PAR InForm® OS 2.3.1 Concepts Guide (320-200112 Rev B, February 2010)

8.7
RAID Types
InForm OS Version 2.3.1 3PAR InForm OS Concepts Guide
The following example shows 2 RAID MP sets in one row, the second set is shown below the
first set. In the first RAID MP set in the following example, p0 is the parity step for data steps F,
L, M, Q, T, V, and X. Figure 8-4 shows a RAID MP logical disk with a set size of 8, and 2 sets in 1
row:
Figure 8-4. Data Striped Across RAID MP Sets on a RAID MP Logical Disk
RAID MP Logical Disk
A
B
Set 1 Row 1
C
p0
= Chunklet
p = Parity step
...W1
X1
Y1
p8
D
E
F
p1
Z1
A2
B2
p9
G
H
I
p2
C2
D2
E2
p10
J
K
L
p3
F2
G2
H2
p11
M
N
O
p4
I2
J2
K2
p12
P
Q
R
p5
L2
M2
N2
p13
S
T
U
p6
O2
P2
Q2
p14
V
W
X
p7...
R2
S2
T2
p15...
...Y
Z
A1
p16
...U2
V2
W2
p24
B1
C1
D1
p17
X2
Y2
Z2
p25
E1
F1
G1
p18
A3
B3
C3
p26
H1
I1
J1
p19
D3
E3
F3
p27
K1
L1
M1
p20
G3
H3
I3
p28
N1
O1
P1
p21
J3
K3
L3
p29
Q1
R1
S1
p22
M3
N3
O3
p30
T1
U1
V1...
p23
P3
Q3
R3
p31...
Set 2 Row 1