If you are using an IBM System Storage device, you must install the latest
versions of the Subsystem Device Driver Path Control Module (SDDPCM) and the
Host Attachment for SDDPCM on AIX for the version of AIX and IBM System
Storage device you are using. Downloaded these directly from the IBM Web
site.
Note: IBM DS8000 storage series requires SDDPCM 2.4.0.4 or higher.