CMMVC9245E The pool specified is a data reduction pool and the IO group selected already contains compressed volumes within a regular pool. An IO group using software compression can not contain compressed volumes from regular and data reduction pools at the same time.

Explanation

An attempt was made to add a compressed volume from a data reduction pool to an I/O group that already contains at least one compressed volume from a regular pool. I/O groups that use software compression can contain compressed volumes from data reduction pools or regular pools, but not both.