Kernel panic -supervisor read, page not present

[Doug Hardie]

I have a system that is almost a year old.  It started rebooting last 
week several times each day with the message "supervisor read, page not 
present".   A search of the archives indicates this is most likely a 
hardware failure, but there is no indication of what might have failed. 
  The only messages preceeding the panic have been a gzip that failed, 
several crons and atruns that failed.  Most of the panics show nothing 
unusual preceeding them in console.log or messages.  The machine is an 
archive server.  Its role in life is to do an rsync every 5 minutes for 
off-site archival storage.  Nothing else is running on it.  Any ideas 
how to determine the failure as its still under warrantee for a few 
more weeks.