[INS-30502] No ASM disk group found.
在安装GI的时候检查不到节点，通过修改/u01/app/oraInventory.xml 的CRS=true参数得以解决，安装GI正常。但是在安装database的时候，检测不到asm磁盘组，
查看日志：
SEVERE: [FATAL] [INS-30502] No ASM disk group found.
CAUSE: There were no disk groups managed by the ASM instance +ASM1.
ACTION: Use Automatic Storage Management Configuration Assistant to add disk groups.
查看节点服务都正常
[grid@node1$]crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
ora.ARCH.dg ora....up.type 0/5 0/ ONLINE ONLINE node1
ora.BACKUP.dg ora....up.type 0/5 0/ ONLINE ONLINE node1
ora.DATA.dg ora....up.type 0/5 0/ ONLINE ONLINE node1
ora....N1.lsnr ora....er.type 0/5 0/0 ONLINE ONLINE node2
ora.asm ora.asm.type 0/5 0/ ONLINE ONLINE node1
ora.cvu ora.cvu.type 0/5 0/0 ONLINE ONLINE node2
ora.gsd ora.gsd.type 0/5 0/ OFFLINE OFFLINE
ora....network ora....rk.type 0/5 0/ ONLINE ONLINE node1
ora....SM1.asm application 0/5 0/0 ONLINE ONLINE node1
ora.node1.gsd application 0/5 0/0 OFFLINE OFFLINE
ora.node1.ons application 0/3 0/0 ONLINE ONLINE node1
ora.node1.vip ora....t1.type 0/0 0/0 ONLINE ONLINE node1
ora....SM2.asm application 0/5 0/0 ONLINE ONLINE node2
ora.node2.gsd application 0/5 0/0 OFFLINE OFFLINE
ora.node2.ons application 0/3 0/0 ONLINE ONLINE node2
ora.node2.vip ora....t1.type 0/0 0/0 ONLINE ONLINE node2
ora.oc4j ora.oc4j.type 0/1 0/2 ONLINE ONLINE node2
ora.ons ora.ons.type 0/3 0/ ONLINE ONLINE node1
ora.scan1.vip ora....ip.type 0/0 0/0 ONLINE ONLINE node2查看磁盘权限
[root@node2 ~]# ls -l /dev/oracleasm/disks/
total 0
brw-rw---- 1 grid oinstall 8, 17 Oct 11 09:28 VOL1
brw-rw---- 1 grid oinstall 8, 33 Oct 11 09:25 VOL2
brw-rw---- 1 grid oinstall 8, 49 Oct 11 09:25 VOL3查看asm实例磁盘组参数：
SQL> show parameter disk_NAME TYPE
------------------------------------ ---------------------------------
VALUE
------------------------------
asm_diskgroups string
ARCH, BACKUP
asm_diskstring string
/dev/oracleasm/disks/VOL*可以看到asm-diskgroups没有DATA磁盘，CRS也存放在DATA磁盘组中的，所以需要把DATA添加到asm_diskgroups参数中。
查看初始化进程状态：
[grid@node2$] crsctl status res -t -init
--------------------------------------------------------------------------------
NAME TARGET STATE SERVER STATE_DETAILS
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.asm
1 ONLINE ONLINE node2 Started
ora.cluster_interconnect.haip1 ONLINE ONLINE node2
ora.crf1 ONLINE ONLINE node2
ora.crsd1 ONLINE ONLINE node2
ora.cssd1 ONLINE ONLINE node2
ora.cssdmonitor1 ONLINE ONLINE node2
ora.ctssd1 ONLINE ONLINE node2 ACTIVE:0
ora.diskmon1 OFFLINE OFFLINE
ora.evmd1 ONLINE ONLINE node2
ora.gipcd1 ONLINE ONLINE node2
ora.gpnpd1 ONLINE ONLINE node2
ora.mdnsd1 ONLINE ONLINE node2 发现ora.diskmon资源没有启动，查看diskmon日志，发现diskmon日志没有生成，查看crs 日志
ASM Error Stack : ORA-15077: could not locate ASM instance serving a required diskgroup
[1136805664]proprasmo: kgfoCheckMount returned [7]
[1136805664]proprasmo: The ASM instance is down
proprioo: Failed to open [+DATA]. Returned proprasmo() with [26]. Marking location as UNAVAILABLE.
proprioo: No OCR/OLR devices are usable
[1136805664]proprasmcl: asmhandle is NULL
[1136805664]clsvactversion:4: Retrieving Active Version from local storage.
[1136805664]clssgsgrppubdata: group (ocr_node-cluster) not found
[1136805664]proprio_repairconf: Failed to retrieve the group public data. CSS ret code [20]
[1136805664]proprioo: Failed to auto repair the OCR configuration.
[1136805664]proprinit: Could not open raw device
[1136805664]proprasmcl: asmhandle is NULL
[1136805664]a_init:16!: Backend init unsuccessful : [26]
[1136805664] OCR context init failure. Error: PROC-26: Error while accessing the physical storage
ORA-15077: could not locate ASM instance serving a required diskgroup
[1136805664] Created alert : (:CRSD00111:) : Could not init OCR, error: PROC-26: Error while accessing the physical storage
ORA-15077: could not locate ASM instance serving a required diskgroup
[1136805664][PANIC] CRSD exiting: Could not init OCR, code: 26
可见，创建ASM磁盘出了问题。
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