When you install Oracle infrastructure on Oracle Linux Version 7.5, exactly when ran script: /u01/app/grid/product/11.2.0/grid/root.sh you got the message:
CRS-4123: Oracle High Availability Services has been started. ohasd is starting ADVM/ACFS is not supported on oraclelinux-release-5-7.0.2 .... 'UpdateNodeList' was successful.
Create a file /tmp/.linux_release before run install grid infrastructure:
[root@oel57 ~]# cd /tmp [root@oel57 tmp]# echo "enterprise-release-5-7.0.2" > .linux_release [root@oel57 tmp]# cat .linux_release enterprise-release-5-7.0.2
See: How Oracle compare the release to decide which OS to support:
Run the grid install again!
Check after install grid
[root@oel57 ~]# cd /u01/app/grid/product/11.2.0/grid/bin [root@oel57 bin]# ./acfsdriverstate -orahome /u01/app/grid/product/11.2.0/grid version ACFS-9205: OS/ADVM,ACFS installed version = 2.6.18-8.el5(i386)/090715.1 [root@oel57 ~]# lsmod | grep oracle oracleacfs 787460 0
oracleadvm 177792 0 oracleoks 226656 2 oracleacfs,oracleadvm oracleasm 46356 1
ADVM/ACFS seen correct installed!