Solution : https://service.sap.com/sap/support/notes/626614 (SAP Service marketplace login required)
Key words : 
xx yy/mm/dd xxx - aix v4, 11 xx-xx bit yymmddthis note serves, terms st06 os06 solution, sap service marketplace, expected beginning jun '03, utilizing disk filtering, $ saposcol -vsaposcol version, aix saposcol, incorrect disk, symptom saposcol
Related Notes : 
       
| 635931 | saposcol on AIX causes high utilization on rootvg disks | 
| 498112 | SAPOSCOL: Disk and file system filter |