Configure/Enable AIO on AIX7.1

[AIXLogician]

Hello,
I need to enable AIO on my DB2 server, I tried to change it using the below command

root@XXXXX:/root# ioo -a | grep aio_active
aio_active = 0
posix_aio_active = 0

root@XXXXX:/root# ioo -p -o aio_active=1
ioo: 1485-114 Static tunable aio_active cannot be changed

Irony is that I was able to change teh parameter on my development box few months ago.

FYI,
On both system we used same media AIX7.1TL01SP04

SARFARAZ AHMED SYED,
Sr. Systems Engineer