Use the following information as a guide for determining when to use the direct copy method to migrate data for a UNIX operating system.
This method suffers from the same drawback as using the cplv and splitlvcopy commands on logical volumes. You can use this method on active file systems, but data consistency between the original and new copies cannot be guaranteed. Use the cpio -p command only on file systems that are in a quiescent state to guarantee consistency between the copy and the original. This will cause some disruption of service to users to occur.