[root@oracle log]# more /var/log/oracleasm
Disk "VOL1" does not exist or is not instantiated
Writing disk header: done
Instantiating disk: oracleasm-instantiate-disk: Unable to open manager: No such file or directory
failed
Clearing disk header: done
Disk "VOL1" does not exist or is not instantiated
Writing disk header: done
Instantiating disk: oracleasm-instantiate-disk: Unable to open manager: No such file or directory
failed
Clearing disk header: done
Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module "oracleasm": failed
Unable to load module "oracleasm"
Loading module "oracleasm": failed
Unable to load module "oracleasm"
Mounting ASMlib driver filesystem: /dev/oracleasm
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
Disk "VOL1" does not exist or is not instantiated
原来是找不到ASM组件oracleasm.ko
在文件系统中查找
[root@oracle log]# find / -name oracleasm.ko
/lib/modules/2.6.18-53.1.21.el5/kernel/drivers/addon/oracleasm/oracleasm.ko
手工安装ASM组件
[root@oracle log]# /sbin/insmod /lib/modules/2.6.18-53.1.21.el5/kernel/drivers/addon/oracleasm/oracleasm.ko
重新执行
/etc/init.d/oracleasm enable执行成功。