Thanks Hein/Volker for the responses! I have attached the Clue listing from the 7.1-2 system. My apologies, the other system is 7.2-1 (bad typing :-( ). My site has never had this bugcheck at times of mount verification, just once (on the 7.2-1) did someone log out and "trigger" the bugcheck. For either version, the bugchecks seen had the current process be a job in the Sys$Batch Queue. By the way, the listing attached is from a scheduled shutdown of the applications running on the node. All other times the bugcheck occurred during "normal" runtime conditions. We are looking into upgrades and ECO's, but previous searches for resolutions didn't seem to match our problem.
I appreciate any tips for troubleshooting or analysis of this problem. Let me know if you desire further info. Thanks