Figure 1 Raid0 Concept; Figure 2 Raid1 Concept - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions
RAID Functions
■
RAID Level Concept
A description of each RAID level is shown below.
●
RAID0 (Striping)
Data is split in unit of blocks and stored across multiple drives.

Figure 1 RAID0 Concept

Data writing request
A
A
C
Drive#0
●
RAID1 (Mirroring)
The data is stored on two duplicated drives at the same time.
If one drive fails, other drive continues operation.

Figure 2 RAID1 Concept

Data writing request
A B
A
B
C
D
Drive#0
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
B C D
B
D
Drive#1
C D
A
B
C
D
Drive#1
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