最近在客户现场实施oracle 11.2.0.4 RAC，遇到CRS无法启动的问题：
[cssd(12879)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /u01/grid/product/11.2.0/crs_1/log/rac1/cssd/ocssd.log
[cssd(12879)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /u01/grid/product/11.2.0/crs_1/log/rac1/cssd/ocssd.log
[cssd(12879)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in /u01/grid/product/11.2.0/crs_1/log/rac1/cssd/ocssd.log
.....
查看ocssd.log日志，可以看到如下信息：
2014-12-10 22:00:02.033: [   SKGFD][2385581824]running stat on disk:/dev/raw/raw4
2014-12-10 22:00:02.033: [   SKGFD][2385581824]running stat on disk:/dev/raw/raw1
2014-12-10 22:00:02.034: [   SKGFD][2385581824]running stat on disk:/dev/raw/raw3
2014-12-10 22:00:02.035: [   SKGFD][2385581824]running stat on disk:/dev/raw/raw2
2014-12-10 22:00:02.035: [   SKGFD][2385581824]running stat on disk:/dev/raw/rawctl
2014-12-10 22:00:02.035: [   SKGFD][2385581824]Fetching UFS disk :/dev/raw/rawctl:
2014-12-10 22:00:02.035: [   SKGFD][2385581824]Fetching UFS disk :/dev/raw/raw2:
2014-12-10 22:00:02.035: [   SKGFD][2385581824]Fetching UFS disk :/dev/raw/raw3:
2014-12-10 22:00:02.035: [   SKGFD][2385581824]Fetching UFS disk :/dev/raw/raw1:
2014-12-10 22:00:02.035: [   SKGFD][2385581824]Fetching UFS disk :/dev/raw/raw4:
从以上信息可以看出，在查看所有有权限的raw的状态，找到votedisk的磁盘，就可以启动了。找不到，再15s进行发现，直到超时。