The ON-ERROR operand of /MODIFY-REMOTE-COPY-PARAMETER controls how the storage system responds. The initial settings of the operands are made by customer support. In concurrent SRDF configurations the settings apply for both remote copy pairs because the same ON-ERROR setting is mandatory for both remote copy pairs.
The following applies for an unprotected source unit: data is only lost in ADAPTIVE-COPY processing mode when WRITE-BUFFER=*DISK is set.
If both the source unit and target unit fail, operation cannot be maintained. The output of /SHOW-REMOTE-COPY-STATUS shows the value NONE for TARGET-ACCESS.
The setting for the ON-ERROR operand determines what happens in this case.
/MODIFY-REMOTE-COPY-PARAMETER ...,ON-ERROR=*CONTINUE
In the event of a failure, operation continues with the remaining unit only; the applications are not stopped. If the target unit fails, a subsequent switch to the target unit is not possible.
/MODIFY-REMOTE-COPY-PARAMETER ...,ON-ERROR=*HOLD
The storage system with the source units rejects all subsequent trquests; the applications are stopped and wait for a response. The source unit assumes the REMOUNT status.A decision can then be made (automatically or by the user) as to whether to continue with the source unit alone or to suspend operation in order to preserve data consistency. The ON-ERROR=*HOLD setting may not be specified for paging units because it might then be the case that no more SHC-OSD commands can be executed. In the case of concurrent SDRF configurations processing continues if only one of the two SDRF links fails.The following commands must be issued to resume operation:
/MODIFY-REMOTE-COPY-PARAMETER ...,ON-ERROR=*CONTINUE /SET-REMOTE-COPY-ACCESS ...,TARGET-ACCESS=*BY-SOURCE