10M1、排除环境变量问题，之前都没问题的，今天早上突然出现的故障
2、排除磁盘空间问题
3、检查看到是ASM服务没正常启动，重启后也是不行
故障截图如下：
4、查看/u01/app/11.2.0/grid/log/rfdb1/alertrfdb1.log日志，提示如下：
再查看/u01/app/11.2.0/grid/log/rfdb1/cssd/ocssd.log日志，提示如下：
重启后也是未自动启动
先检查磁盘，磁盘映射，多路径服务，链路情况，昨晚2021-08-04 23:04:表决盘断了之后就一直重启，ASM 和 DB 不要动，CRS起来之后也就解决了
[cssd(6243)]CRS-1615:No I/O has completed after 50% of the maximum interval. Voting file /dev/dm-3 will be considered not functional in 99930 milliseconds
2021-08-04 23:04:28.902:
[cssd(6243)]CRS-1614:No I/O has completed after 75% of the maximum interval. Voting file /dev/dm-3 will be considered not functional in 49930 milliseconds
2021-08-04 23:04:58.909:
[cssd(6243)]CRS-1613:No I/O has completed after 90% of the maximum interval. Voting file /dev/dm-3 will be considered not functional in 19920 milliseconds
2021-08-04 23:05:18.924:
[cssd(6243)]CRS-1604:CSSD voting file is offline: /dev/dm-3; details at (:CSSNM00058:) in /u01/app/11.2.0/grid/log/rfdb1/cssd/ocssd.log.
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