ASM磁盘组丢失，ORA-15180，ORA-01115，ORA-01110，ORA-15081，ORA-00202，ORA-15081，ORA-15097

启动数据库，提示ORA-01115: IO error reading block from file，可能是asm出问题，关闭asm，提示ORA-15097: cannot SHUTDOWN ASM instance with connected client

# oracleasm status
Checking if ASM is loaded: yes
Checking if /dev/oracleasm is mounted: yes

# oracleasm listdisks
VOL01
VOL02
VOL03
VOL04
VOL05
VOL06

asm磁盘正常

切换到grid用户

# su - grid

$ asmca

磁盘组是空的，asm磁盘组丢失

查看alert日志

ORA-15180: could not open dynamic library ASM Library - Generic Linux, version 2.0.4 (KABI_V2), error [open]
ORA-01115: IO error reading block from file  (block # )
ORA-01110: data file 2: '+DG01/ora10/datafile/sysaux.257.846843789'
ORA-15081: failed to submit an I/O operation to a disk
ERROR: error ORA-15180 caught in ASM I/O path 
Errors in file /u01/app/oracle/diag/rdbms/ora10/ora10/trace/ora10_j001_1438.trc:

ORA-00202: control file: '+DG01/ora10/controlfile/current.260.846843997'
ORA-15081: failed to submit an I/O operation to a disk

一大堆的错误，关键是磁盘组动态库无法加载，查看动态库位置，发现文件被删除了，重新安装动态磁盘库

# rpm -ivh --force oracleasm*

因为我的动态库安装包在opt目录，所以，安装完后，会有动态库的目录oracle生成

# ll
总计 2444696
drwxr-xr-x 3 root root       4096 05-09 14:09 oracle
-rw-r--r-- 1 root root     136910 05-05 13:34 oracleasm-2.6.18-164.el5-2.0.5-1.el5.x86_64.rpm
-rw-r--r-- 1 root root      14176 05-05 13:29 oracleasmlib-2.0.4-1.el5.x86_64.rpm
-rw-r--r-- 1 root root      90225 05-05 13:29 oracleasm-support-2.1.8-1.el5.x86_64.rpm

重启下，系统，错误消失。