oracle asm disk被格式化为ntfs文件系统

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数据库实例日志：

Tue Mar 01 12:18:12 2016

SUCCESS: diskgroup ORADISKGRP1 was dismounted

Errors in file C:\APP\ORACLE\PRODUCT\\diag\rdbms\bflex\bflex1\trace\bflex1_ckpt_:

ORA-00206: error in writing (block 3, # blocks 1) of control file

ORA-00202: control file: '+ORADISKGRP1/bflex/controlfile/'

ORA-15078: ASM diskgroup was forcibly dismounted

再看asm日志

Tue Mar 01 12:18:12 2016

ASM Health Checker found 1 new failures

Dirty Detach Reconfiguration complete

Tue Nov 01 12:18:12 2016

WARNING: dirty detached from domain 1

NOTE: cache dismounted group 1/0x5DD073B7 (ORADISKGRP1)

SQL> alter diskgroup ORADISKGRP1 dismount force /* ASM SERVER:1573942199 */

Tue Nov 01 12:18:12 2016

NOTE: cache deleting context for group ORADISKGRP1 1/0x5dd073b7

GMON dismounting group 1 at 6 for pid 30, osid 7684

NOTE: Disk ORADISKGRP1_0000 in mode 0x7f marked for de-assignment

NOTE: Disk ORADISKGRP1_0001 in mode 0x7f marked for de-assignment

NOTE: Disk ORADISKGRP1_0002 in mode 0x7f marked for de-assignment

SUCCESS: diskgroup ORADISKGRP1 was dismounted

SUCCESS: alter diskgroup ORADISKGRP1 dismount force /* ASM SERVER:1573942199 */

SUCCESS: ASM-initiated MANDATORY DISMOUNT of group ORADISKGRP1

这里的asm日志很明显由于asm disk无法正常访问,报ORA-27072错误,磁盘组被强制dismount. 一般出现这样故障的原因大多都是人为误操作造成的，比如挂到A机的裸盘被挂至B机，然后被误格式化。

处理办法：

先用kfed恢复磁盘头

C:\Users\Administrator> kfed repair '\\.\J:'

C:\Users\Administrator>kfedread'\\.\J:'

:                          1 ; 0x000: 0x01

:                          130 ; 0x001: 0x82

kfbh.type:                            1 ; 0x002: KFBTYP_DISKHEAD

:                          1 ; 0x003: 0x01

:                     254 ; 0x004: T=0 NUMB=0xfe

:              2147483654 ; 0x008: TYPE=0x8 NUMB=0x6

:                   717599272 ; 0x00c: 0x2ac5b228

:                        0 ; 0x010: 0x00000000

:                        0 ; 0x014: 0x00000000

:                          0 ; 0x018: 0x00000000

:                          0 ; 0x01c: 0x00000000

:    ORCLDISKDATA6 ; 0x000: length=13

[0]:   1096040772 ; 0x008: 0x41544144

[1]:           54 ; 0x00c: 0x00000036

[2]:            0 ; 0x010: 0x00000000

[3]:            0 ; 0x014: 0x00000000

[4]:            0 ; 0x018: 0x00000000

[5]:            0 ; 0x01c: 0x00000000

使用asmtool -list查看相关磁盘信息

然后用dbv检测是否有坏块，没有就好办了。幸好asm有备份，用备份恢复即可。

SQL> recover database;

完成介质恢复。

SQL>alterdatabase open;

数据库已更改。

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