Migration and compatibility
When machines are migrated from a previous release of AIX®, the tuning commands are automatically set to run in compatibility mode.
Most of the information in this section does not apply to compatibility mode. For more information, see compatibility mode in Files Reference.
When a machine is initially installed with AIX, it is automatically set to run in the tuning mode, which is described in this chapter. The tuning mode is controlled by the sys0 attribute called pre520tune, which can be set to enable to run in compatibility mode and disable to run in the tuning mode.
To retrieve the current setting of the pre520tune attribute,
run the following command:
lsattr -E -l sys0 chdev -l sys0 -a pre520tune=enableuse SMIT panel.