I will check the OS log files/event logs for errors:
AIX: errpt -a
Windows: event logs
Solaris: /var/adm/messages
linux: /var/log/messages
HPUX: /var/adm/syslog/syslog.log
Tru64: /var/adm/syslog
SGI Irix: /var/adm/SYSLOG
ESX: /var/log/vmkernel
ESXi: /var/log/messages