All RAC Nodes reboot without log-entry


I'm facing the problem, that all my RAC nodes (2 Node Cluster on Solaris 10, Oracle CRS + ASM) reboot at the same time without any log entries in /var/etc/messages, /var/log/syslog and all log files under $ORACLE_CRS_HOME/log/...

The cluster is a fresh installation. Any suggestions? Where can I look further?

Kind regards,

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