DBCA 日志 路径
[root@oracle73 ~]# cd /u01/app/oracle/cfgtoollogs/dbca/
[root@oracle73 dbca]# ll
total 1700
-rw-r----- 1 oracle oinstall 1740250 Jul 24 10:31 trace.log_2018-07-24_09-31-27-AM
-rw-r----- 1 oracle oinstall 0 Jul 24 09:31 trace.log_2018-07-24_09-31-27-AM.lck

DBCA LOG 有发现ASM 磁盘组
[DBStorageOption.flowWorker] [ 2018-07-24 09:35:52.924 CST ] [VerificationUtil.traceAndLogInternal:15712] [StorageDataHandler.getStorageDataForACFS:557] Discovered '0' ACFS storage from node 'oracle74'
[DBStorageOption.flowWorker] [ 2018-07-24 09:35:52.924 CST ] [VerificationUtil.traceAndLogInternal:15712] [StorageDataHandler.discoverStorageData:201] Storage of type 'ACFS' was successfully discovered[count of storage found = '0']
[DBStorageOption.flowWorker] [ 2018-07-24 09:35:52.924 CST ] [StorageDataHandler.discoverStorageData:211] stType ACFS potentialMatchList size 0
[DBStorageOption.flowWorker] [ 2018-07-24 09:35:52.925 CST ] [VerificationUtil.traceAndLogInternal:15712] [StorageDataHandler.traceDiscoveredSet:2415]

Discovery details for storage type 'ASMDG' ...
Count of devices = 3

1. OCRVOTE [1 nodes: oracle74]
2. ORADATA [1 nodes: oracle74]
3. MGMT [1 nodes: oracle74]

参考http://qxm0411.blog.163.com/blog/static/13721454820137193352451/

对比用户的组发现oracle 确认asmoper 和 asmadmin 添加上即可

[root@oracle73 ~]# id grid
uid=54322(grid) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54327(asmdba),54328(asmoper),54329(asmadmin)
[root@oracle73 ~]# id oracle
uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54323(oper),54324(backupdba),54325(dgdba),54326(kmdba),54327(asmdba),54329(asmadmin),54330(racdba)
[root@oracle73 ~]# usermod -u 54321 -g oinstall -G dba,asmdba,backupdba,dgdba,kmdba,racdba,asmoper oracle
[root@oracle73 ~]#
[root@oracle73 ~]#
[root@oracle73 ~]# id oracle
uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54324(backupdba),54325(dgdba),54326(kmdba),54327(asmdba),54328(asmoper),54330(racdba)
[root@oracle73 ~]# id grid
uid=54322(grid) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54327(asmdba),54328(asmoper),54329(asmadmin)
[root@oracle73 ~]# id oracle
uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54324(backupdba),54325(dgdba),54326(kmdba),54327(asmdba),54328(asmoper),54330(racdba)
[root@oracle73 ~]# usermod -u 54321 -g oinstall -G dba,asmdba,backupdba,dgdba,kmdba,racdba,asmoper,asmadmin,oper oracle
[root@oracle73 ~]# id oracle
uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54324(backupdba),54325(dgdba),54326(kmdba),54327(asmdba),54328(asmoper),54329(asmadmin),54330(racdba)

重新刷新即可发现 ASM DISKGROUP

参考其他链接：
http://www.itpub.net/forum.php?mod=viewthread&tid=1906331&page=1
http://www.itpub.net/thread-1783419-2-1.html
https://support.oracle.com/knowledge/Oracle%20Database%20Products/1952685_1.html