ORA-15196: invalid ASM block header [kfc.c:26368] [endian_kfbh]故障处理

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标题：ORA-15196: invalid ASM block header [kfc.c:26368] [endian_kfbh]故障处理

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客户对asm进行扩容,由于配置不恰当,在使用asmca增加asm disk的时候直接选中了已经被用作文件系统的vg中的磁盘

Tue Nov 19 09:48:48 2019
Non critical error ORA-48180 cFri Nov 22 12:47:48 2019
SQL> ALTER DISKGROUP XIFENFEI ADD  DISK '/dev/rhdisk29' SIZE 491520M ,
'/dev/rhdisk30' SIZE 491520M ,
'/dev/rhdisk31' SIZE 491520M /* ASMCA */
NOTE: GroupBlock outside rolling migration privileged region
NOTE: Assigning number (4,15) to disk (/dev/rhdisk29)
NOTE: Assigning number (4,16) to disk (/dev/rhdisk30)
NOTE: Assigning number (4,17) to disk (/dev/rhdisk31)
NOTE: requesting all-instance membership refresh for group=4
NOTE: initializing header on grp 4 disk XIFENFEI_0015
NOTE: initializing header on grp 4 disk XIFENFEI_0016
NOTE: initializing header on grp 4 disk XIFENFEI_0017
NOTE: requesting all-instance disk validation for group=4
Fri Nov 22 12:47:51 2019
NOTE: skipping rediscovery for group 4/0xb08c40b (XIFENFEI) on local instance.
NOTE: requesting all-instance disk validation for group=4
NOTE: skipping rediscovery for group 4/0xb08c40b (XIFENFEI) on local instance.
Fri Nov 22 12:47:59 2019
NOTE: initiating PST update: grp = 4
Fri Nov 22 12:47:59 2019
GMON updating group 4 at 12 for pid 27, osid 12649908
NOTE: PST update grp = 4 completed successfully
NOTE: membership refresh pending for group 4/0xb08c40b (XIFENFEI)
GMON querying group 4 at 13 for pid 18, osid 39912680
Fri Nov 22 12:48:01 2019
NOTE: cache opening disk 15 of grp 4: XIFENFEI_0015 path:/dev/rhdisk29
NOTE: cache opening disk 16 of grp 4: XIFENFEI_0016 path:/dev/rhdisk30
NOTE: cache opening disk 17 of grp 4: XIFENFEI_0017 path:/dev/rhdisk31
NOTE: Attempting voting file refresh on diskgroup XIFENFEI
NOTE: Refresh completed on diskgroup XIFENFEI. No voting file found.
GMON querying group 4 at 14 for pid 18, osid 39912680
SUCCESS: refreshed membership for 4/0xb08c40b (XIFENFEI)
SUCCESS: ALTER DISKGROUP XIFENFEI ADD  DISK '/dev/rhdisk29' SIZE 491520M ,
'/dev/rhdisk30' SIZE 491520M ,
'/dev/rhdisk31' SIZE 491520M /* ASMCA */

发现增加错磁盘之后,从vg里面强制踢掉被asm使用的磁盘,并且尝试在asm中删除这些磁盘,并加入新磁盘

Fri Nov 22 12:52:03 2019
SQL> ALTER DISKGROUP XIFENFEI DROP  DISK 'XIFENFEI_0015','XIFENFEI_0016','XIFENFEI_0017' /* ASMCA */
NOTE: GroupBlock outside rolling migration privileged region
Fri Nov 22 12:52:03 2019
NOTE: stopping process ARB0
NOTE: rebalance interrupted for group 4/0xb08c40b (XIFENFEI)
NOTE: requesting all-instance membership refresh for group=4
NOTE: membership refresh pending for group 4/0xb08c40b (XIFENFEI)
Fri Nov 22 12:52:12 2019
GMON querying group 4 at 15 for pid 18, osid 39912680
SUCCESS: refreshed membership for 4/0xb08c40b (XIFENFEI)
SUCCESS: ALTER DISKGROUP XIFENFEI DROP  DISK 'XIFENFEI_0015','XIFENFEI_0016','XIFENFEI_0017' /* ASMCA */
NOTE: starting rebalance of group 4/0xb08c40b (XIFENFEI) at power 1
Starting background process ARB0
…………
Fri Nov 22 12:58:26 2019
SQL> ALTER DISKGROUP XIFENFEI ADD  DISK '/dev/rhdisk7' SIZE 491520M /* ASMCA */
NOTE: GroupBlock outside rolling migration privileged region
Fri Nov 22 12:58:26 2019
NOTE: stopping process ARB0
NOTE: rebalance interrupted for group 4/0xb08c40b (XIFENFEI)
NOTE: ASM did background COD recovery for group 4/0xb08c40b (XIFENFEI)
NOTE: Assigning number (4,18) to disk (/dev/rhdisk7)
NOTE: requesting all-instance membership refresh for group=4
NOTE: initializing header on grp 4 disk XIFENFEI_0018
NOTE: requesting all-instance disk validation for group=4
NOTE: skipping rediscovery for group 4/0xb08c40b (XIFENFEI) on local instance.
NOTE: requesting all-instance disk validation for group=4
NOTE: skipping rediscovery for group 4/0xb08c40b (XIFENFEI) on local instance.
Fri Nov 22 12:58:41 2019
NOTE: initiating PST update: grp = 4
Fri Nov 22 12:58:41 2019
GMON updating group 4 at 16 for pid 27, osid 12649908
NOTE: PST update grp = 4 completed successfully
Fri Nov 22 12:58:41 2019
NOTE: membership refresh pending for group 4/0xb08c40b (XIFENFEI)
GMON querying group 4 at 17 for pid 18, osid 39912680
NOTE: cache opening disk 18 of grp 4: XIFENFEI_0018 path:/dev/rhdisk7
NOTE: Attempting voting file refresh on diskgroup XIFENFEI
NOTE: Refresh completed on diskgroup XIFENFEI. No voting file found.
GMON querying group 4 at 18 for pid 18, osid 39912680
SUCCESS: refreshed membership for 4/0xb08c40b (XIFENFEI)
NOTE: starting rebalance of group 4/0xb08c40b (XIFENFEI) at power 1
SUCCESS: ALTER DISKGROUP XIFENFEI ADD  DISK '/dev/rhdisk7' SIZE 491520M /* ASMCA */
Starting background process ARB0
Fri Nov 22 12:58:46 2019
ARB0 started with pid=44, OS id=54460432
…………
Fri Nov 22 12:59:57 2019
SQL> ALTER DISKGROUP XIFENFEI ADD  DISK '/dev/rhdisk10' SIZE 491520M ,
'/dev/rhdisk11' SIZE 491520M ,
'/dev/rhdisk8' SIZE 491520M ,
'/dev/rhdisk9' SIZE 491520M /* ASMCA */
NOTE: GroupBlock outside rolling migration privileged region
Fri Nov 22 12:59:57 2019
NOTE: stopping process ARB0
NOTE: rebalance interrupted for group 4/0xb08c40b (XIFENFEI)
NOTE: ASM did background COD recovery for group 4/0xb08c40b (XIFENFEI)
NOTE: Assigning number (4,19) to disk (/dev/rhdisk10)
NOTE: Assigning number (4,20) to disk (/dev/rhdisk11)
NOTE: Assigning number (4,21) to disk (/dev/rhdisk8)
NOTE: Assigning number (4,22) to disk (/dev/rhdisk9)
NOTE: requesting all-instance membership refresh for group=4
NOTE: initializing header on grp 4 disk XIFENFEI_0019
NOTE: initializing header on grp 4 disk XIFENFEI_0020
NOTE: initializing header on grp 4 disk XIFENFEI_0021
NOTE: initializing header on grp 4 disk XIFENFEI_0022
NOTE: requesting all-instance disk validation for group=4
NOTE: skipping rediscovery for group 4/0xb08c40b (XIFENFEI) on local instance.
Fri Nov 22 13:00:08 2019
NOTE: requesting all-instance disk validation for group=4
Fri Nov 22 13:00:08 2019
NOTE: skipping rediscovery for group 4/0xb08c40b (XIFENFEI) on local instance.
NOTE: initiating PST update: grp = 4
Fri Nov 22 13:00:13 2019
GMON updating group 4 at 19 for pid 27, osid 12649908
NOTE: PST update grp = 4 completed successfully
NOTE: membership refresh pending for group 4/0xb08c40b (XIFENFEI)
GMON querying group 4 at 20 for pid 18, osid 39912680
NOTE: cache opening disk 19 of grp 4: XIFENFEI_0019 path:/dev/rhdisk10
NOTE: cache opening disk 20 of grp 4: XIFENFEI_0020 path:/dev/rhdisk11
NOTE: cache opening disk 21 of grp 4: XIFENFEI_0021 path:/dev/rhdisk8
NOTE: cache opening disk 22 of grp 4: XIFENFEI_0022 path:/dev/rhdisk9
NOTE: Attempting voting file refresh on diskgroup XIFENFEI
NOTE: Refresh completed on diskgroup XIFENFEI. No voting file found.
GMON querying group 4 at 21 for pid 18, osid 39912680
SUCCESS: refreshed membership for 4/0xb08c40b (XIFENFEI)
SUCCESS: ALTER DISKGROUP XIFENFEI ADD  DISK '/dev/rhdisk10' SIZE 491520M ,
'/dev/rhdisk11' SIZE 491520M ,
'/dev/rhdisk8' SIZE 491520M ,
'/dev/rhdisk9' SIZE 491520M /* ASMCA */
NOTE: starting rebalance of group 4/0xb08c40b (XIFENFEI) at power 1
Starting background process ARB0

asm在做着reblance的过程中遭遇到坏块,直接导致磁盘组dismount

Sun Nov 24 04:42:27 2019
NOTE: group 4 PST updated.
WARNING: cache read  a corrupt block: group=4(XIFENFEI) dsk=15 blk=258 disk=15
 (XIFENFEI_0015) incarn=1717056824 au=113792 blk=2 count=254
Errors in file /u01/app/oracle/diag/asm/+asm/+ASM2/trace/+ASM2_x000_28639240.trc:
ORA-15196: invalid ASM block header [kfc.c:26368] [endian_kfbh] [2147483663] [258] [56 != 0]
NOTE: a corrupted block from group XIFENFEI was dumped to
   /u01/app/oracle/diag/asm/+asm/+ASM2/trace/+ASM2_x000_28639240.trc
WARNING: cache read (retry) a corrupt block: group=4(XIFENFEI)
 dsk=15 blk=258 disk=15 (XIFENFEI_0015) incarn=1717056824 au=113792 blk=2 count=1
Errors in file /u01/app/oracle/diag/asm/+asm/+ASM2/trace/+ASM2_x000_28639240.trc:
ORA-15196: invalid ASM block header [kfc.c:26368] [endian_kfbh] [2147483663] [258] [56 != 0]
ORA-15196: invalid ASM block header [kfc.c:26368] [endian_kfbh] [2147483663] [258] [56 != 0]
ERROR: cache failed to read group=4(XIFENFEI) dsk=15 blk=258 from disk(s): 15(XIFENFEI_0015)
ORA-15196: invalid ASM block header [kfc.c:26368] [endian_kfbh] [2147483663] [258] [56 != 0]
ORA-15196: invalid ASM block header [kfc.c:26368] [endian_kfbh] [2147483663] [258] [56 != 0]
NOTE: cache initiating offline of disk 15 group XIFENFEI
NOTE: process _x000_+asm2 (28639240) initiating offline of disk
    15.1717056824 (XIFENFEI_0015) with mask 0x7e in group 4
NOTE: initiating PST update: grp = 4, dsk = 15/0x66583538, mask = 0x6a, op = clear
GMON updating disk modes for group 4 at 23 for pid 28, osid 28639240
ERROR: Disk 15 cannot be offlined, since diskgroup has external redundancy.
ERROR: too many offline disks in PST (grp 4)
Sun Nov 24 04:42:27 2019
NOTE: cache dismounting (not clean) group 4/0x0B08C40B (XIFENFEI)
WARNING: Offline for disk XIFENFEI_0015 in mode 0x7f failed.
Sun Nov 24 04:42:27 2019
NOTE: halting all I/Os to diskgroup 4 (XIFENFEI)
NOTE: messaging CKPT to quiesce pins Unix process pid: 59441780, image: oracle@xifenfei2 (B000)
Sun Nov 24 04:42:27 2019
ERROR: ORA-15130 thrown in ARB0 for group number 4
Errors in file /u01/app/oracle/diag/asm/+asm/+ASM2/trace/+ASM2_arb0_50856926.trc:
ORA-15130: diskgroup "XIFENFEI" is being dismounted

至此两个节点的该磁盘组就陷入了不停的mount，然后dismount的轮流循环中.这里我们可以大概的分析出来,由于vg的磁盘组被写入了数据或者强制剔除的时候导致asm写入该文件的数据被破坏,导致后续的asm reblance遭遇坏块,然后直接dismount.对于该问题的解决方案,通过对对该磁盘组的acd和cod进行patch,让其不进行reblance,保持该磁盘组现在,稳定的mount状态,然后对其数据进行备份和重建该磁盘组.这个客户运气不错,vg中的asm disk磁盘写入较少,数据库运行正常.
对于这种情况,如果发生极端损坏,比如asm磁盘组无法mount,可以参考:找回ASM中数据文件
如果是asm的元数据大量损坏,无法通过asm字典级别恢复,可以通过参考:asm disk header 彻底损坏恢复

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