On AIX the disk seem to be mostly on the first adapter?
nmon now collects the adapter data from AIX libperfstat. This is the addition of the disk stats added up by knowning which disk is conected to which adapter. This of course, is complex for mutlipath IO disks. AIX seems to build this map from the order in which disks are discovered rather than used. Depending on your initial setup it can often mean that most disks are assigned the first one or two adapters. Sorry, there is nothing that nmon can do about this.
