mksysb with the flag ( ipemX )

mksysb -ipemX  /tmp/mksysb.image


-m
            Calls the mkszfile command, with the -m flag to generate map files. Note: The use of the -m flag causes the functions of the -i flag to
            be executed also.


  -p
            Disables software packing of the files as they are backed up. Some tape drives use their own packing or compression algorithms.





# smitty lsmksysb

While running lsmksysb, if the mksysb is not good, it will ask for 

Mount volume 2 on eprdmt4.mksysb.01.15.12.
        Press the Enter key to continue.

In that case, use -p flag and take a new mksysb... Now, the mksysb will be run fully and will not skip any binary files which are in larger size.