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ETERNUS SF AdvancedCopy Manager V16.9A Operation Guide
FUJITSU Storage

9.1.5 Notes on Snapshot Replication

9.1.5.1 Notes on Combining Cascade Copy and Concurrent OPC in Operation

If you specify a volume used in cascade copy as the copy source and then execute a Concurrent OPC by the swsrpmake command, it may not be possible to preserve the sequence of data updates across multiple volumes.
In this case, an error message is displayed and the command terminates in an error.

If the error cannot be resolved by responding to the message, we recommend you change the operating method of Advanced Copy or reconfigure the system.

If you cannot change the operating method of Advanced Copy or reconfigure the system, create a file (check.ini) that sets the sequence of data updates across multiple volumes. Then, disable sequence preservation before you retry Concurrent OPC. The sequence of data updates is not preserved across multiple volumes.

Create check.ini in the following path of the server on which to execute the swsrpmake command:

/etc/opt/FJSVswsrp/data/DEFAULT
Table 9.3 File Format of check.ini

Section Name

Key Name

Value

[check]

ConcurOPCCascade

Set preservation of the sequence of data updates across multiple volumes.
By setting "No", preservation of the sequence is disabled.
By setting any value other than "No", preservation of the sequence is enabled.

[Example for disabling sequence preservation]

[check]
ConcurOPCCascade=No

Point

For any of the below ETERNUS Disk storage systems, Concurrent OPC can be executed regardless of sequence preservation of data updates. However, the sequence of data updates is not preserved across multiple volumes.

  • ETERNUS DX80 S2 (for earlier than V10L30 firmware)

  • ETERNUS DX90 S2 (for earlier than V10L30 firmware)

  • ETERNUS DX400 S2 series (for earlier than V10L30 firmware)

  • ETERNUS DX8000 S2 series (for earlier than V10L30 firmware)