Figure 61 Cascade Copy (Using Three Copy Sessions); Figure 62 Cascade Copy (Using Four Copy Sessions) - Fujitsu ETERNUS DX500 S4/DX600 S4 Design Manual

2. Basic Functions
Backup (Advanced Copy)
A Cascade Copy that uses the three copy sessions can be performed with the following configuration.

Figure 61 Cascade Copy (Using Three Copy Sessions)

OPC/QuickOPC/EC
Copy source
: Copy session 1
: Copy session 2
: Copy session 3
A Cascade Copy that uses the four copy sessions can be performed with the following configuration.
However, two EC sessions in the copy destination ETERNUS device cannot be "Active" at the same time.

Figure 62 Cascade Copy (Using Four Copy Sessions)

ETERNUS DX/AF
A
EC
ETERNUS DX/AF
A
QuickOPC
: Copy session 1
: Copy session 2
: Copy session 3
: Copy session 4
FUJITSU Storage ETERNUS DX500 S4/DX600 S4, ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Design Guide (Basic)
REC
(Stack mode)
Copy destination Copy destination
and source and source
B
REC
(Stack mode)
B
REC
(Stack mode)
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Copyright 2019 FUJITSU LIMITED
OPC/QuickOPC/
SnapOPC/SnapOPC+/
EC
Copy destination
ETERNUS DX/AF
C D
EC
ETERNUS DX/AF
C D
EC
E
EC
E
EC
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