Yesterday I got problem, suddenly the solaris server was rebooting without any message left in /var/adm/messages. Usually all information related with system log exists inside. I also checked some log files in /var/log/sulog, /var/crash/, mail, using last command but none of those gave something.
But when I look at system messages when it's booting up then I found that some messages retrieve from LOM. Finally I got clue, I did show log message from ALOM directly with following steps :
1. Connect via ALOM
2. Type #. to change in ALOM mode
3. Type showlogs
Then the messages that I want appeared. It shows that something happen with system board therefore the server reboot abnormally.
But when I look at system messages when it's booting up then I found that some messages retrieve from LOM. Finally I got clue, I did show log message from ALOM directly with following steps :
1. Connect via ALOM
2. Type #. to change in ALOM mode
3. Type showlogs
Then the messages that I want appeared. It shows that something happen with system board therefore the server reboot abnormally.