ORACLE誤刪除ASM磁盤修復

　　在數據庫運維中，總會遇到一些粗枝大葉的DBA，一不當心刪除一些東西，這裏舉例講解在誤刪除ASM磁盤以後，若是用KFED工具進行恢復：

[grid@RAC1 ~]$ sqlplus / as sysasm

SQL*Plus: Release 11.2.0.4.0 Production on Thu Jan 5 00:06:04 2017

Copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options

SQL> col path format a30
SQL> select name,path,header_status from v$asm_disk;

NAME                           PATH                           HEADER_STATU
------------------------------ ------------------------------ ------------
DATA_0001                      /dev/mapper/mpathc             MEMBER
DATA_0004                      /dev/mapper/mpathd             MEMBER
DATA_0003                      /dev/mapper/mpathf             MEMBER
DATA_0000                      /dev/mapper/mpathb             MEMBER
DATA1_0001                     /dev/mapper/mpathh             MEMBER
DATA_0002                      /dev/mapper/mpathg             MEMBER
DATA1_0002                     /dev/mapper/mpathi             MEMBER
DATA1_0000                     /dev/mapper/mpathe             MEMBER

8 rows selected.

SQL> drop diskgroup DATA;
drop diskgroup DATA
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15053: diskgroup "DATA" contains existing files

SQL> drop diskgroup DATA including contents;                                     
drop diskgroup DATA including contents
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15027: active use of diskgroup "DATA" precludes its dismount


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 關閉數據鏈接：

SQL> alter diskgroup DATA dismount force;

Diskgroup altered.

SQL> drop diskgroup DATA force including contents;
drop diskgroup DATA force including contents
*
ERROR at line 1:
ORA-15039: diskgroup not dropped
ORA-15073: diskgroup DATA is mounted by another ASM instance

dismount 須要兩邊都dismount 

SQL> drop diskgroup DATA force including contents;

Diskgroup dropped.

SQL> select name,path,header_status from v$asm_disk;

NAME                           PATH                           HEADER_STATU
------------------------------ ------------------------------ ------------
                               /dev/mapper/mpathc             FORMER
                               /dev/mapper/mpathd             FORMER
                               /dev/mapper/mpathf             FORMER
                               /dev/mapper/mpathb             FORMER
                               /dev/mapper/mpathg             FORMER
DATA1_0001                     /dev/mapper/mpathh             MEMBER
DATA1_0002                     /dev/mapper/mpathi             MEMBER
DATA1_0000                     /dev/mapper/mpathe             MEMBER

8 rows selected.


[grid@RAC1 ~]$ crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.

###############################################################################################################


使用kfed進行恢復 [grid@RAC1 ~]$ kfed read /dev/mapper/mpathc > /tmp/mpathc-meta
[root@RAC1 tmp]# vi mpathc-meta 

用vi打開生成的文件，修改下面一行數據
kfdhdb.hdrsts:                        4 ; 0x027: KFDHDR_FORMER
修改成：
kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER
[grid@RAC1 ~]$ kfed merge /dev/mapper/mpathc text=/tmp/mpathc-meta

將全部5塊磁盤進行一樣的操做。

SQL> select name,path,header_status from v$asm_disk;

NAME                           PATH                           HEADER_STATU
------------------------------ ------------------------------ ------------
                               /dev/mapper/mpathc             MEMBER
                               /dev/mapper/mpathd             MEMBER
                               /dev/mapper/mpathf             MEMBER
                               /dev/mapper/mpathb             MEMBER
                               /dev/mapper/mpathg             MEMBER
DATA1_0001                     /dev/mapper/mpathh             MEMBER
DATA1_0002                     /dev/mapper/mpathi             MEMBER
DATA1_0000                     /dev/mapper/mpathe             MEMBER

SQL> alter diskgroup DATA mount;

Diskgroup altered.

兩個節點都須要進行mount。

SQL> select name,path,header_status from v$asm_disk;

NAME                           PATH                           HEADER_STATU
------------------------------ ------------------------------ ------------
DATA_0001                      /dev/mapper/mpathc             MEMBER
DATA_0004                      /dev/mapper/mpathd             MEMBER
DATA_0003                      /dev/mapper/mpathf             MEMBER
DATA_0000                      /dev/mapper/mpathb             MEMBER
DATA1_0001                     /dev/mapper/mpathh             MEMBER
DATA_0002                      /dev/mapper/mpathg             MEMBER
DATA1_0002                     /dev/mapper/mpathi             MEMBER
DATA1_0000                     /dev/mapper/mpathe             MEMBER

8 rows selected.

[grid@RAC1 ~]$ crs_stat -tName           Type           Target    State     Host        ------------------------------------------------------------ora.DATA.dg    ora....up.type ONLINE    ONLINE    rac1        ora.DATA1.dg   ora....up.type ONLINE    ONLINE    rac1        ora....ER.lsnr ora....er.type ONLINE    ONLINE    rac1        ora....N1.lsnr ora....er.type ONLINE    ONLINE    rac1        ora.asm        ora.asm.type   ONLINE    ONLINE    rac1        ora.cvu        ora.cvu.type   ONLINE    OFFLINE               ora.gsd        ora.gsd.type   OFFLINE   OFFLINE               ora....network ora....rk.type ONLINE    ONLINE    rac1        ora.oc4j       ora.oc4j.type  ONLINE    OFFLINE               ora.ons        ora.ons.type   ONLINE    ONLINE    rac1        ora....SM1.asm application    ONLINE    ONLINE    rac1        ora....C1.lsnr application    ONLINE    ONLINE    rac1        ora.rac1.gsd   application    OFFLINE   OFFLINE               ora.rac1.ons   application    ONLINE    ONLINE    rac1        ora.rac1.vip   ora....t1.type ONLINE    ONLINE    rac1        ora.rac2.vip   ora....t1.type ONLINE    OFFLINE               ora....ry.acfs ora....fs.type ONLINE    ONLINE    rac1        ora.scan1.vip  ora....ip.type ONLINE    ONLINE    rac1