•
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.
shows the supported combinations when adding a copy session to a copy source volume where a copy
session has already been configured.
Table 34 Available Cascade Copy Combinations (When a Cascade Copy Performs Session 2 Followed by Session 1)
Copy session
1
Copy session 2
OPC
QuickOPC
SnapOPC
EC
REC syn-
chronous
transmis-
sion
REC Stack
mode
REC Consisten-
cy mode
OPC
¡
¡
¡
¡
¡
¡
¡
¡
QuickOPC
¡
¡
(*1)
¡
¡
¡
¡
¡
¡
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.
2. Basic Functions
Backup (Advanced Copy)
101
FUJITSU Storage ETERNUS DX500 S4/DX600 S4, ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
P3AM-7722-25ENZ0
Summary of Contents for ETERNUS DX500 S3/DX600 S3
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