Figure 1 Raid0 Concept; Figure 2 Raid1 Concept - Fujitsu ETERNUS AF250 Design Manual

1. Function
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
B C D
B
D
Drive#1
C D
A
B
C
D
Drive#1
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
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