CMMVC9190E The pool specified is a data reduction pool, creating thin or compressed volumes from this type of pool must have autoexpand on.

not

Explanation
You must enable the autoexpand option for all thin-provisioned or compressed volumes in data
reduction pools.

User response
For the mkvdisk command, make sure that the -autoexpand
parameter is set to on.

For the mkvolume command, make sure that the
-noautoexpand parameter is not included.

Retry the command.