I have seen that in AIX whenever you have to change kernel like from
32 to 64 bit then its required to do
#ln -s /usr/lib/boot/unix_64 /usr/lib/boot/unix
#ls -s /usr/lib/boot/unix_64 /unix
#bosboot -ad hdisk0

Why its required to link both /unix and /usr/lib/boot/unix?
Why not just /unix. On my system I just linked /unix and everything
seemed to be working fine.
Can anyone explain why we need to link both /unix and
/usr/lib/boot/unix