Hi,
As per the system copy guide, it says that it is possible to restore the DB if the system is ABAP or JAVA or ABAP + JAVA.
However, if the system is ABAP, It is possible. that we are sure of it.
In case of ABAP + JAVA or JAVA alone , durnig the system copy installation, you will be prompted for JAVA Export location which will be the export of JAVA DB . So we need to take an export of the JAVA system first and try to restore the DB of JAVA. Secondly, apart from /usr/sap/SID backup, there are many other locations that are dependent . So it is not possible to do it. You have to do export/ import method or use SAPINST to restore the DB in the target system.
So in short,
ABAP => possible
ABAP + JAVA or JAVA => Not possible directly . Use SAPISNT
Thanks and Regards,
Vimal