• When performing a temporary recovery
Use a Cascade Copy of QuickOPC (copy session 1) and OPC (copy session 2).
• When backing up two generations
Use a multi-copy that is configured with QuickOPC and QuickOPC.
*3: A Cascade Copy cannot be performed when a copy source and destination volume is in an older ETERNUS
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.
Table 36 shows the supported combinations when adding a copy session to a copy source volume where a copy
session has already been configured.
Table 36 Available Cascade Copy Combinations (When a Cascade Copy Performs Session 2 Followed by Session 1)
Copy session
1
Copy session 2
OPC QuickOPC SnapOPC SnapOPC+ EC
REC syn-
chronous
transmis-
sion
REC Stack
mode
REC Consisten-
cy mode
OPC
¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡
QuickOPC
¡ ¡ (*1) ¡ ¡ ¡ ¡ ¡ ¡
SnapOPC
´ ´ ´ ´ ´ ´ ´ ´
SnapOPC+
´ ´ ´ ´ ´ ´ ´ ´
EC
¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡
REC synchro-
nous trans-
mission
¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡
REC Stack
mode
¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡
REC Consis-
tency mode
¡ ¡ ¡ ¡ ¡ ¡ (*2) ¡ ¡ (*2)
¡: Possible, ´: Not possible
*1: This combination is supported only if the copy size in both the copy source volume and the copy destina-
tion volume is less than 2TB.
If the copy size is 2TB or larger, perform the following operations instead.
• When performing a temporary recovery
Use a Cascade Copy of QuickOPC (copy session 1) and OPC (copy session 2).
• When backing up two generations
Use a multi-copy that is configured with QuickOPC and QuickOPC.
*2: 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.
1. Function
Backup (Advanced Copy)
98
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays
Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
P3AG-1822-09ENZ0
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