You can use the below script to find out whether you can able to perform a multibos with current space available on the same disk (rootvg).

free=`lsvg rootvg |grep "FREE PPs" |awk '{print $6}'`
req=`lsvg -l rootvg |egrep -e "hd2|hd4|hd5|hd9|hd10" |awk '{s+=$3} END {print s}'`
expr "$free" - "$req"

If value of script shows negative, then you need to free up some space and run this script again. Until you reach the positive number.