Fujitsu ETERNUS DX100 S5 - Figure 59 Cascade Copy (Using Three Copy Sessions)

• If a Cascade Copy performs session 1 before session 2, and copy session 1 is an OPC or QuickOPC
session, the logical data in the intermediate volume when copy session 2 is started (the copy
destination volume for copy session 1) is copied to the copy destination volume for copy session 2. A
logical data copy is shown below.
OPC / QuickOPC
OPC / QuickOPC /
SnapOPC /
SnapOPC+ /
EC / REC
: Copy session 1
: Copy session 2
A Cascade Copy that uses the three copy sessions can be performed with the following configuration.
Figure 59 Cascade Copy (Using Three Copy Sessions)
Copy source Copy destination
and sour
ce
Copy destination
and source
OPC/QuickOPC/EC
REC
(Stack mode)
OPC/QuickOPC/
SnapOPC/SnapOPC+/
EC
Copy destination
: Cop
y session 1
: Copy session 2
: Copy session 3
2. Basic Functions
Backup (Advanced Copy)
119 Design Guide