ETERNUS SF AdvancedCopy Manager V16.1 Operation Guide for Copy Control Module

6.3 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 acopc start or acsnap start command, it may not be possible to preserve the sequence of data updates across multiple volumes. In this case, an error message will be displayed and the command terminates in an error.

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

If you cannot change the operation method of AdvancedCopy or reconfigure the system, create a file (user.properties) that sets the sequence of data updates across multiple volumes. Then, disable sequence preservation before you retry Concurrent OPC.

Create user.properties on the following path of the server on which to execute the acopc start or acsnap start command:

• In a non-cluster environment

  OS	Location of File Creation
  Windows	$INS_DIR\etc\prop
  Solaris Linux	/etc/opt/FJSVccm/prop

  $INS_DIR is the "Program Directory" as specified during AdvancedCopy Manager CCM installation.

• In cluster environment

  OS	Location of File Creation
  Windows	$SHARE_DL:$SHARE_TOP\etc\prop
  Solaris Linux	$SHARE_MNT/etc/opt/FJSVccm

  $SHARE_DL is the drive letter of the shared disk for AdvancedCopy Manager CCM shared data.
  $SHARE_TOP is the directory that contains "Environment Directory" and "Work Directory" of the shared disk for AdvancedCopy Manager CCM shared data.

  $SHARE_MNT is the mount point of the shared disk for AdvancedCopy Manager CCM shared data.

Table 6.1 File Format of user.properties File

Key Name	Description
concurOPC.cascade	Set preservation of the sequence of data updates across multiple volumes. By setting "off", preservation of the sequence will be disabled. By setting any value other than "off", preservation of the sequence will be enabled.

[Example for disabling sequence preservation]

concurOPC.cascade=off

Point

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

• ETERNUS DX80/DX80 S2 (for firmware version numbers before V10L30)

• ETERNUS DX90/DX90 S2 (for firmware version numbers before V10L30)

• ETERNUS DX400/DX400 S2 series (for firmware version numbers before V10L30)

• ETERNUS DX8000/DX8000 S2 series (for firmware version numbers before V10L30)