This topic describes the cause of the "S8_* An error occurred in the preparation for data synchronization of the disk partition." error message that is reported when you use Server Migration Center (SMC) to run a migration job. This topic also describes how to resolve the error.
Problem description
During an SMC migration job, the "S8_* An error occurred in the preparation for data synchronization of the disk partition." error message is reported. The following S8_* error codes may be reported:
S8_U28
S8_U7
S8_U56
S8_U6
Cause
The error may occur during the preparation to synchronize data stored in disk partitions due to the following causes:
An exception occurs on port 8080 that is used by the intermediate service of the destination instance.
The source server cannot access the IP address of the destination instance by using port 8080.
Solution
For more information, see What do I do if I receive an S11 error code indicating an error in the network connection to the intermediate service of the destination instance?
After the error is resolved, run the SMC client and retry the migration job. For more information, see Run the SMC client.