Figure 58 Multi-Copy (Case 1: When Performing A Cascade Copy For An Rec Session In Consistency Mode); Figure 59 Multi-Copy (Case 2: When Performing A Cascade Copy For An Rec Session In Consistency Mode) - Fujitsu ETERNUS AF250 Design Manual

1. Function
Backup (Advanced Copy)
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 58 Multi-Copy (Case 1: When Performing a Cascade Copy for an REC Session in Consistency Mode)

ETERNUS DX/AF
OPC / QuickOPC / EC
Copy source

Figure 59 Multi-Copy (Case 2: When Performing a Cascade Copy for an REC Session in Consistency Mode)

ETERNUS DX/AF
OPC / QuickOPC / EC
Copy source
●
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 60, "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.
For a Cascade Copy, the copy destination area for copy session 1 and the copy source area for copy session 2
must be identical or the entire copy source area for copy session 2 must be included in the copy destination area
for copy session 1.
ETERNUS DX/AF
REC (Consistency)
destination 1
REC (Consistency)
destination 2
ETERNUS DX/AF
REC (Consistency)
destination 3
ETERNUS DX/AF
REC (Consistency)
destination 1
REC (Consistency)
destination 2
ETERNUS DX/AF
REC (Consistency)
destination 3
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
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