The following maps the I/O configuration change element which is only contained in an ACTIVATE record event (SMF22IND=9) for processors that support dynamic I/O. You can perform software-only configuration changes that write type 22 records on processors not supporting dynamic I/O, but the configuration change elements only contain software entries. In that case, the device (except SMF22DVN), physical control unit, and CHPID entries all contain zeros.
The I/O configuration change element consists of a header section, followed by an array containing a variable number of entries. Each entry identifies an I/O component (device, control unit, or CHPID) that has been added, deleted, or modified.