Prakash,
Recent version of Postgresql (9.3.11+, 9.4.6+, 9.5+) have changed the implementation of checksums for TAR files that are used during the copy. This has caused some versions of the Delphix Engine to incorrectly report data corruption.
The problem has been fixed in Delphix Engines 5.0.2+ and 5.1+.
Can you indicate which versions of the Delphix Engine and Postgresql database you are using?
Eyal