Technote (FAQ)
Question
How to switch the 32 bit AIX OS to 64 bit Mode.
Answer
Switching From 32 to 64 Bit Mode
To switch from 32-bit mode to 64-bit mode run the following commands, in the given order:
1.ln -sf /usr/lib/boot/unix_64 /unix
2.ln -sf /usr/lib/boot/unix_64 /usr/lib/boot/unix
3.bosboot -ad /dev/ipldevice
4.shutdown -Fr
5.bootinfo -K (should now show 64)
Switching From 64 To 32-Bit Mode
To switch from 64-bit mode to 32-bit mode run the following commands, in the given order:
1.ln -sf /usr/lib/boot/unix_mp /unix
2.ln -sf /usr/lib/boot/unix_mp /usr/lib/boot/unix
3.bosboot -ad /dev/ipldevice
4.shutdown -Fr
5.bootinfo -K (should now show 32)
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