How to Change AIX to a 64 Bit Kernel

IBM distributes AIX (Advanced Interactive eXecutive) as a series of operating systems that are based on certain versions of UNIX. AIX is compatible with both 32-bit and 64-bit PowerPC systems. This means that, to run AIX, you need a computer with a PowerPC processor or its instruction set will not be recognized. As of 2010, the latest version of AIX is 6.3, released on November 2007.

Instructions

1. Start up AIX and wait until you get to the command screen.

2. Type the command: "ln --sf /usr/lib/boot/unix_64 /unix" and "ln -sf /usr/lib/boot/unix_64 /usr/lib/boot/unix" to link the 64-bit files.

3. Type in: "lslv --m hd5".

4. Create a boot image by entering: "bosboot -ad /dev/ipldevice".

5. Reboot the system using a fast shutdown with instructions to boot up again immediately by typing: "shutdown --Fr".

Tips & Warnings

• If you experience any problems following setup, check if your version of AIX supports using a 64-bit kernel. Such versions go from AIX 5.1 upward.

References

• IBM: Alpahbetical List of Commands in AIX

Resources

• SysSunConfig: 64-bit mode on AIX Version 4.3.3 to 5.1.0