dchunk_enable does not get set through vxtunefs in AIX (3551030)

Last published : Sep 09, 2026
The vxtunefs command uses the oslevel -s command to get OS TL level, but the OS level reports the lowest level of any installed AIX fileset on a system. Therefore, the oslevel command provides inaccurate OS level which may break the conditional logic inside VxFS.
Related information
Veritas File System known issues

Workaround:

To check which fileset is at a lower level and upgrade it to the recommended level
  1. This command shows which fileset is at a lower SP level:
    \#oslevel -s -l `oslevel -sq 2>/dev/null | sed -n '1p'`

1.  This command shows which fileset is at a lower TL level :```txt

    \#oslevel -r -l `oslevel -rq 2>/dev/null | sed -n '1p'`

    ```

1.  Upgrade the lower TL level fileset.

See [Supported AIX operating systems](../../../requirements/supported-aix-operating-systems.md).