● RAID1+0 (Striping of Pairs of Drives for Mirroring)
RAID1+0 combines the high I/O performance of RAID0 (striping) with the reliability of RAID1 (mir-
roring).
Figure 3 RAID1+0 Concept
Drive#3
Drive#7
D
D'
Drive#2
Drive#6
C
C'
Drive#1
Drive#5
B
B'
Dr
ive#0
Drive#4
A
A'
Striping (RAID0)
Mirroring (RAID1)
Data writing request
A B C D
Mirroring
Mirroring
Mirroring
Mirroring
● RAID5 (Striping with Distributed Parity)
Data is divided into blocks and allocated across multiple drives together with parity information
created from the data in order to ensure the redundancy of the data.
Figure 4 RAID5 Concept
A
E
I
M
A
B C D
Data writing request
B
F
J
P M, N, O, P
C
G
P I, J, K, L
N
D
P E, F, G, H
K
O
H
L
P
Create
parity data
P A, B, C, D
A B DC
Drive#0 Drive#1 Drive#2 Drive#3 Drive#4
Parity for data A to D: P A, B, C, D
Parity for data E to H: P E, F, G, H
Parity for data I to L: P I, J, K, L
Parity for data M to P: P M, N, O, P
2. Basic Functions
RAID Functions
18
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems
Design Guide (Basic)
Copyright 2023 Fujitsu Limited
P3AM-7642-32ENZ0
To Next Page
Loading...
