ASM实例启动报错：ORA-29701、ORA-15110解决方案
通过对于联机文档的解读，我了解到是没有添加CSS服务的原因，好，下面我们在root用户下执行/u01/app/oracle/product/10.2/db_1/b
在手动写ASM参数文件后启动ASM遇到一个问题,在启动asm实例的时候提示:
ORA-29701 :unable to connect to Cluster Manager
通过对于联机文档的解读，我了解到是没有添加CSS服务的原因，好，下面我们在root用户下执行/u01/app/Oracle/product/10.2/db_1/bin/localconfig add命令去添加CSS服务，好！问题解决，，但是在启动asm实例却报了ORA-15110: nodiskgroups mounted 错误（启动实例的时候出现ORA-15110错误非常正常，因为我之前还没有创建diskgroup）
SQL>select path,mount_status from v$asm_disk order by disk_number;
PATH MOUNT_S
-------------------------------------------------- -------
ORCL:VOL01 CLOSED
ORCL:VOL02 CLOSED
查看磁盘的状态，如果没有看到，则是设置的asm_diskstring参数不正确，需要调整。
PATH MOUNT_S
---------------------------------------------------------
ORCL:VOL01 CACHED
ORCL:VOL02 CACHED
创建磁盘组
SQL>create diskgroup syasm normal redundancy disk 'ORCL:VOL01';
SQL> alterdiskgroup syasm add disk 'ORCL:VOL02';
Diskgroupcreated.
创建磁盘组后，再次查询v$asm_disk视图，发现ASM磁盘的状态由closed变成cached
SQL>select path,mount_status from v$asm_disk order by disk_number;
PATH MOUNT_S
-------------------------------------------------- -------
ORCL:VOL01 CACHED
ORCL:VOL02 CACHED
创建spfile，重启实例
SQL>create spfile from pfile;
File created.
SQL>shutdown immediate
ASM diskgroups dismounted
ASM instance shutdown
SQL> startup
ASM instance started
Total System Global Area 92274688 bytes
Fixed Size 1217884 bytes
Variable Size 65890980 bytes
ASM Cache 25165824 bytes
ORA-15110: no diskgroups mounted
无法启动磁盘组，并报ORA-15110错误，决定通过手动方式启动磁盘组
SQL> alterdiskgroup all mount;
alterdiskgroup all mount
*
ERROR at line1:
ORA-15110: nodiskgroups mounted
手动也无法启动，是什么问题呢~
通过SQL>show paramter asm;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
asm_diskgroups string
asm_diskstring string
asm_power_limit integer 1
asm_diskgroups后面的值竟然是空置，难怪磁盘组会起不来，手动加上！
SQL>altersystem set asm_diskgroups=SHIYUEASM scope=both;
好！再次启动磁盘组！
SQL> alterdiskgroup all mount;
SQL>startup
ASM instance started
Total System Global Area 92274688 bytes
Fixed Size 1217884 bytes
Variable Size 65890980 bytes
ASM Cache 25165824 bytes
ASM diskgroups mounted
磁盘组起来了，手动创建ASM磁盘组完成！