oracleasm deletedisk - Clearing disk header failed 的解决方法
在虚拟机上搭建 Oracle 11gR2 的 RAC 。 安装 Clusterware 的时候出了一点错误。 所以强行把 Clusterware 给删除了。 清除了相关的目录和文件。 因为 11gr2 的 OCR 是存放在 ASM 上的，所以需要清除这部分信息。
[root@rac2 ~]# oracleasm listdisks
CRS
DATA
FRA
[root@rac2 ~]# oracleasm deletedisk CRS
Clearing disk header: failed
Unable to clear disk "CRS"
[root@rac2 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
[root@rac2 ~]# oracleasm listdisks
CRS
DATA
FRA
可是删除报 Clearing disk header: failed 错误。 尝试把另一个节点的 ASM 停止掉删除，还是不行。
看了一下 oracleasm 的 log ：
[root@rac1 mapper]# tail -20 /var/log/oracleasm
Cleaning disk "DATA"
Validating disk "FRA"
Unmounting ASMlib driver filesystem: /dev/oracleasm
Unloading module "oracleasm": oracleasm
Disk "CRS" does not exist or is not instantiated
Clearing disk header: done
Loading module "oracleasm": oracleasm
Mounting ASMlib driver filesystem: /dev/oracleasm
Reloading disk partitions: done
Cleaning any stale ASM disks...
Scanning system for ASM disks...
Disk "FRA" does not exist or is not instantiated
Instantiating disk "FRA"
oracleasm-read-label: Unable to read device "/dev/sdb": Input/output error
oracleasm-read-label: Unable to read device "/dev/sdf": Input/output error
Disk "DATA" does not exist or is not instantiated
Instantiating disk "DATA"
oracleasm-read-label: Unable to read device "/dev/sdd": Input/output error
Disk "FRA" is a valid ASM disk
Disk "DATA" is a valid ASM disk
google 了一下。 在 Oracle 论坛上找到了解决方法：
http://forums.oracle.com/forums/thread.jspa?threadID=969534
Same problem with 11.2.0.1 on x86-64 RH Linux 5.4.
Had to :
1. shutdown CRS on all nodes of the cluster (# ./crsctl stop crs)
2. disable CRS from starting on reboot (# ./crsctl disable crs)
3. Reboot all the servers (# shutdown -r now)
4. After reboot, stop ASMLIB (# service oracleasm stop)
5. Remove the disk using physical name rather than logical name (service oracleasm deletedisk /dev/mapper/mpath01p1)
6. Restart ASMLIB (# service oracleasm start)
7. Enable CRS on re-boot (# ./crsctl disable crs)
因为我之前的 Cluster 已经删除，所以直接停 ASM server 。 删除就可以了。
[root@rac1 mapper]# service oracleasm stop
Dropping Oracle ASMLib disks: [ OK ]
Shutting down the Oracle ASMLib driver: [ OK ]
[root@rac1 mapper]# ls
control crs crsp1 data datap1 fra frap1
[root@rac1 mapper]# service oracleasm deletedisk /dev/mapper/crsp1
Removing ASM disk "/dev/mapper/crsp1": [ OK ]
[root@rac1 mapper]# service oracleasm start
Initializing the Oracle ASMLib driver: [ OK ]
Scanning the system for Oracle ASMLib disks: [ OK ]
[root@rac1 mapper]# oracleasm listdisks
DATA
FRA
搞定。 到另一个节点查看：
[root@rac2 ~]# oracleasm listdisks
CRS
DATA
FRA
[root@rac2 ~]# oracleasm scandisks
Reloading disk partitions: done
Cleaning any stale ASM disks...
Cleaning disk "CRS"
Scanning system for ASM disks...
[root@rac2 ~]# oracleasm listdisks
DATA
FRA
也同步了。 看来 ASM 11 在 Linux 5.4 上还是有点问题。
参考至：http://blog.csdn.net/tianlesoftware/archive/2010/11/13/6007437.aspx
如有错误，欢迎指正