With the Solaris OS running on the server, you have the full complement of Solaris OS files and commands available for collecting information and for troubleshooting.
If POST, service processor, or the Solaris PSH features do not indicate the source of a fault, check the message buffer and log files for notifications for faults. Hard drive faults are usually captured by the Solaris message files.
Use the dmesg command to view the most recent system message. To view the system messages log file, view the contents of the /var/adm/messages file.