Fujitsu Eternus DX80 S2 - Figure 6.11 Cascade Copy (Using Three Copy Sessions)

Chapter 6 Optional Functions
6.2 Backup (Advanced Copy)
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
Copyright 2013 FUJITSU LIMITED P3AM-4812-11ENZ0
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*3: A cascade copy cannot be performed when a copy source and destination volume is in an older ETERNUS Disk
storage system model.
*4: When copy session 1 uses the REC Consistency mode, the data transmission sequence of copy session 1 is
guaranteed, but the data transmission sequence of copy session 2 is not guaranteed.
A cascade copy that uses three copy sessions can only be performed with the following configuration.
Figure 6.11 Cascade copy (using three copy sessions)
• A cascade copy can be performed when the copy type for copy session 1 is XCOPY or ODX. The copy
destination area for XCOPY or ODX and the copy source area for copy session 2 do not have to be
completely identical. For example, a cascade copy can be performed when the copy source area for
copy session 2 is only part of the copy destination area for copy session 1.
XCOPY or ODX cannot be set as the copy type for copy session 2 in a cascade copy.
• For more details on XCOPY, refer to "7.2
VMware Linkage" (page 92). For more details on ODX, refer to
"7.3
Microsoft Linkage" (page 94).
• The ETERNUS DX Disk storage system firmware version must be V10L50 or later to use XCOPY or ODX
for a cascade copy. The firmware version can be checked via ETERNUS Web GUI or ETERNUS CLI. When
upgrading firmware is required, contact your sales representative.
Copy source Copy source +
Copy destination
Copy source +
Copy destination
OPC, QuickOPC,
or EC
REC
(Stack mode)
OPC, QuickOPC,
SnapOPC, SnapOPC+,
or EC
Copy destination
: Copy session 1
: Copy session 2
: Copy session 3