Still chasing a hang that has dogged me for quite some time. This time I noticed the console logging output showed that processing stopped right on the five-minute interval when cron would have kicked off bsdsar, which in turn ran vmstat. The system is a Supermicro P4PDE motherboard with dual Xeons and hyperthreading enabled. Kernel debugging results are available at http://www.palisadesys.com/~ghelmer/crash-20090220.txt If anyone cares to take a look, I would be grateful. Guy Helmer