Hi Eric,
This is a tricky question with a tricky answer. The above answer is correct, provided that all of the kit was applied. (*This discussion is for anything before V5.1B PK4, which is an 'all or nothing' kit.)
You can apply PKn and not really have a tru[e] PKn baseline. For example, if you have a conflict and certain patches do not get installed, it will still appear to dupatch that PKn is installed but ALL of PKn is not installed since the [unresolved] conflicting patches have not been applied.
At the Support center, we take your kernel and compare it against the RCS versions of the actual kit to see if you are truly at PKn or not. Of course this doesn't take into consideration non-kernel patches, but is a pretty good approximation.
You can look at the dupatch log files (/var/adm/patch/log) to see if there were any individual patches in the aggregate kit that failed to install. BTW, if there were problems, you probably want to resolve those. The log file usually tells you the reason it didn't 'pass'. For example, it may not have been able to identify a patch that it was planning to replace/update.
*As of PK4 for V5.1B, the patch kit is 'all or nothing'. So this won't be an issue (or shouldn't be) in the V5.1B future patch kits. :)
Greg
