To setup Asynchronous I/O on AIX 5.3

To set up asynchronous I/O:

1.As root, enter the following command to check the current status of AIO support:
# lsdev -Cc aio
The status should be Available.
2.If the status shown is Defined, change the STATE to be configured at system restart option to Available by entering the following command:
# smit chaio
3.Reboot the system.
4.Re-enter the following command to check the current status of AIO support:
# lsdev -Cc aio
Verify that the status is set to Available.