Reg: HP-UX os EhP5Upgrade

Hi Everybody,

     This is my upgrade project.

     My current Server Running SAP ECC6.0 My OS is: HP-UX, Database is: 9.1, my doubt is.My operating system10.3 and Database9.1 is low version still is running any update is required or not about SAP EHP5 upgrade purpose.

Please give  upgrade related notes and documents its very useful, I having some douments, pls give your suggestions also. its very use full this project.