Fujitsu ETERNUS DX100 S3 - Figure 55 Multi-Copy (Case 1: When Performing a Cascade Copy for an REC Session in Consistency Mode); Figure 56 Multi-Copy (Case 2: When Performing a Cascade Copy for an REC Session in Consistency Mode)

When performing a Cascade Copy for an REC session in Consistency mode, the copy source of the
session must not be related to another REC session in Consistency mode with the same destination
storage system.
Figure 55 Multi-Copy (Case 1: When Performing a Cascade Copy for an REC Session in Consistency
Mode)
Copy
destination 1
Copy
destination 2
Copy
d
estination 3
ETERNUS DX/AF
Copy source
ETERNUS DX/AF
ETERNUS DX/AF
OPC / QuickOPC / EC
REC
(Consistency)
REC
(Consistency)
REC
(Consistency)
Figure 56 Multi-Copy (Case 2: When Performing a Cascade Copy for an REC Session in Consistency
Mode)
Copy
destination 1
Copy
destination 2
Copy
d
estination 3
ETERNUS DX/AF
Copy source
ETERNUS DX/AF
ETERNUS DX/AF
OPC / QuickOPC / EC
REC
(Consistency)
REC
(Consistency)
REC
(Consistency)
● Cascade Copy
A copy destination with a copy session that is set can be used as the copy source of another copy
session.
A Cascade Copy is performed by combining two copy sessions.
In Figure 57, "Copy session 1" refers to a copy session in which the copy destination area is also
used as the copy source area of another copy session and "Copy session 2" refers to a copy session
in which the copy source area is also used as the copy destination area of another copy session.
2. Basic Functions
Backup (Advanced Copy)
97
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems
Design Guide (Basic)
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