Hi
AIO is a feature of the OS. In
AIX case, you need to check if AIO is enabled:
root@localhost /root >lsdev -C | grep aio
aio0 Available Asynchronous I/O (Legacy)
posix_aio0 Defined Posix Asynchronous I/O
root@localhost /root >
If aio0 is not available you need to make it configured,
smitty aio
Hope this helps