Figure 60 Cascade Copy (Using Four Copy Sessions) - Fujitsu ETERNUS AF S3 Series Design Manual

2. Basic Functions
Backup (Advanced Copy)
A Cascade Copy that uses the four copy sessions can be performed with the following configuration.
However, two EC sessions in the copy destination storage system cannot be "Active" at the same time.
Figure 60
ETERNUS AF/DX
A
ETERNUS AF/DX
A
: Copy session 1
: Copy session 2
: Copy session 3
: Copy session 4
Cascade Copy (Using Four Copy Sessions)
B
REC
EC
(Stack mode)
B
REC
QuickOPC
(Stack mode)
ETERNUS AF/DX
C
EC
ETERNUS AF/DX
C
EC
106
D E
EC
D E
EC
Design Guide