ASM装载磁盘组时ORA-15063错误处理

一次重启LINUX后，启动ASM实例时，发生了这个错误：

SQL> startup

ASM instance started

Total System Global Area 130023424 bytes

Fixed Size 2071000 bytes

Variable Size 102786600 bytes

ASM Cache 25165824 bytes

ORA-15032: not all alterations performed

ORA-15063: ASM discovered an insufficient number of disks for diskgroup

"DWDATA"

查看错误信息：

15063, 00000, "ASM discovered an insufficient number of disks for diskgroup \"%s\""

// *Cause: ASM was unable to find a sufficient number of disks belonging to the

// diskgroup to continue the operation.

// *Action: Check that the disks in the diskgroup are present and functioning,

// that the owner of the ORACLE binary has read/write permission to

// the disks, and that the ASM_DISKSTRING initialization parameter

// has been set correctly. Verify that ASM discovers the appropriate

// disks by querying V$ASM_DISK from the ASM instance.

可以看到这个错误是由于ASM实例无法装载硬盘组的所有磁盘而引起的，有可能是权限问题。马上想到是否是由于OS重启后?设备的用户、权限是否变更，导致ORACLE用户没有权限访问?设备。将?设备的权限更改完后，果然ASM能够正常启动。其实这个问题还是很简单的，LINUX启动后默认会把?设备的拥有者改为root用户，只需把/etc/udev/permissions.d/50-udev.permissions 这个文件中的行“raw/*:root:disk:0660”注释掉，添加新行“raw/*:oracle:dba:0660”，这样系统启动后?设备的拥有者就变为ORACLE用户了，当然如果?设备还有其他用户的话，那么就需要针对不同的?设备进行更改了。