aix 53--07，rac环境10.2.0.4.0，其中一台主机经常重启？？

aix 53--07，rac环境10.2.0.4.0，其中一台主机经常重启，数据库层面没有查到任何报错信息，errpt里面也仅有一些报错，如下：

AA8AB241   0921074211 T O clstrmgrES     OPERATOR NOTIFICATION
AFA89905   0921074211 I O grpsvcs        Group Services daemon started
97419D60   0921074211 I O topsvcs        Topology Services daemon started
A6DF45AA   0920205211 I O RMCdaemon      The daemon is started.
67145A39   0920205111 U S SYSDUMP        SYSTEM DUMP
F48137AC   0920205011 U O minidump       COMPRESSED MINIMAL DUMP
C69F5C9B   0920205011 P S SYSPROC        SOFTWARE PROGRAM ABNORMALLY TERMINATED
9DBCFDEE   0920205111 T O errdemon       ERROR LOGGING TURNED ON
C69F5C9B   0920204611 P S SYSPROC        SOFTWARE PROGRAM ABNORMALLY TERMINATED
AA8AB241   0918084611 T O clstrmgrES     OPERATOR NOTIFICATION
AFA89905   0918084611 I O grpsvcs        Group Services daemon started
97419D60   0918084611 I O topsvcs        Topology Services daemon started
A6DF45AA   0917195911 I O RMCdaemon      The daemon is started.
67145A39   0917195711 U S SYSDUMP        SYSTEM DUMP
F48137AC   0917195711 U O minidump       COMPRESSED MINIMAL DUMP
C69F5C9B   0917195711 P S SYSPROC        SOFTWARE PROGRAM ABNORMALLY TERMINATED
9DBCFDEE   0917195811 T O errdemon       ERROR LOGGING TURNED ON
C69F5C9B   0917195211 P S SYSPROC        SOFTWARE PROGRAM ABNORMALLY TERMINATED
C69F5C9B   0917114311 P S SYSPROC        SOFTWARE PROGRAM ABNORMALLY TERM


真的没有头绪，无从查找，望高手指点迷津~~

什么时间重启的你总得说一下吧？按时间查找总是应该的吧？