Fujitsu ETERNUS AF S3 Series, Design Manual

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Multi-Copy
Multiple copy destinations can be set for a single copy source area to obtain multiple backups.
Even if the beginning and end of the copy source areas for the copy sessions do not match, multi-copy can
be performed for the overlapping copy source area.
In the multi-copy shown in
Figure 52 , the entire range that is copied for copy session 1 will be the target for
the multi-copy function.
When copy sessions 1 and 2 are EC/REC, updates to area A in the copy source (update 1) are copied to both
copy destination 1 and copy destination 2.
Updates to areas other than A in the copy source (update 2) are copied only to copy destination 2.
Figure 52 Targets for the Multi-Copy Function
Copy source
Copy session 1
Copy session 2
Copy destination 1
Copy destination 2 Update 1
Update 2
A
Up to eight OPC, QuickOPC, SnapOPC, EC, or REC sessions can be set for a multi-copy.
Figure 53 Multi-Copy
Copy
destination 1
ETERNUS AF/DX ETERNUS AF/DX
ETERNUS AF/DX
Copy
destination 2
Copy
destination 3
Copy
destination 4
Copy
destination 5
Copy source
Copy
destination 6
Copy
destination 7
Copy
destination 8
2. Basic Functions
Backup (Advanced Copy)
99 Design Guide