Is it possible to restore the backup of DB2 Ver 9.5 in to DB2 Ver 9.1

No, you can't:
IBM DB2 9.5 Information Center for Linux, UNIX, and Windows


"The target system must have the same (or later) version of the DB2 database product as the source system. You cannot restore a backup created on one version of the database product to a system running an earlier version of the database product. For example, you can restore a DB2 UDB V8 backup on a DB2 V9 database system, but you cannot restore a DB2 V9 backup on a DB2 UDB V8 database system."

db2move is the option left

other way is
1) db2 -x "select 'EXPORT TO SCHNAME.'||TABNAME||'.IXF OF IXF SELECT * FROM SCHNAME.'||TABNAME||';' from syscat.tables where tabschema = 'SCHNAME' and TYPE = 'T' " > export.sql
2) db2 -x "select 'IMPORT FROM SCHNAME.'||TABNAME||'.IXF OF IXF CREATE INTO SCHNAME.'||TABNAME||';' from syscat.tables where tabschema = 'SCHNAME' AND TYPE = 'T' " > import.sql

export.sql > export.txt in the newer version of db
import.sql > import.txt in the older version of db
regds
Paul

Unless you have a small database, you better have a COMMITCOUNT in the those import statements.