Onbar/Informix Storage Manager question

Forgive me this stupid question, but I don't know where can I find so called "Informix Primitive Storage Manager"? I can't use onbar because it requires XBSA library for my UNIX (I use SCO v5.0.2 and Informix ODS v 7.22) - ibsad001.so. Of course I haven't it, but Informix tells that onbar is bandled with primitive storage manager, so I think, it should be somewhere... But where exactly? Any information would be greatly appriciated. -- Alex Dron IDS, Lviv, Ukraine