IBM Support

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)

Document information

More support for: Informix Servers

Software version: 9.4, 10.0

Operating system(s): AIX

Reference #: 1621253

Modified date: 2012-12-26