【ASM数据恢复】ORA-15196: 无效的 ASM 块标头 [:] [] [] [] [ != ] ORA-15196 invalid ASM block header [kfc.c] [check_kfbh]错误解析

Posted by PDSERVICE on May 28, 2016 In

ORA-15196: invalid ASM block header [kfc.c] [check_kfbh] [325] [2147483650] [2170461157 != 2170461165]

ORA-15196: 无效的 ASM 块标头 [:] [] [] [] [ != ]

oerr ora 15196

15196, 00000, "invalid ASM block header [%s:%s] [%s] [%s] [%s] [%s != %s]"

// *Cause: ASM encountered an invalid metadata block.

// *Action: Contact Oracle Support Services.

如果自己搞不定可以找诗檀软件专业ORACLE数据库修复团队成员帮您恢复!

诗檀软件专业数据库修复团队

服务热线： 13764045638 QQ号:47079569 邮箱：service@parnassusdata.com

是当ASM读取到无效的asm block header时的报错，相关的BUG NOTE如下：

check_kfbh的存在时为了检验块的一致性，会对整个块做一个32 bit xor 来对比现有check_kfbh，有点象block的checksum

The field check_kfbh is adjusted to ensure that a 32 bit xor of the whole block will be zero. Check values are always calculated before writing a
block to disk, but may not be accurate for a block in the buffer cache. In this example the check value is “8A 8B D0 AE” but since this is little
endian the actual value is “0xAED08B8A

BUG 13010760 – ORA-15196: INVALID ASM BLOCK HEADER [KFC.C:9133] [CHECK_KFBH] [2147483649] [8] 11.1.0.7.0

BUG 13829821 – ORA-15196 [KFC.C:25210] [CHECK_KFBH] [2147483649] [8] [2170839822 != 2170840087] 11.2.0.2.2

BUG 13978640 – LNX64-12.1-ASM:HIT ORA-15196:INVALID ASM BLOCK HEADER [KFC.C:27990] [CHECK_KFBH] 12.1

BUG 14827224 – PS:WIN64:ORA-15196:INVALID ASM BLOCK HEADER[KFC.C:28261] ON DB CREATE ON VMS 12.1

BUG 16025504 – ASM METADATA CORRUPTION DURING OAM SYSTEM TESTING 12.1

BUG 14020529 – RAC CLUSTER CRASH WITH ORA-15196 ERROR 10.2.0.4

BUG 14109859 – DISKGROUP ASM NOT POSSIBLE MOUNT – INSTANCE CRASH AND NOT OPEN 11.2.0.2

BUG 14740185 – ASM REPORTED CORRUPTED AT BLOCKS : ORA-15196: INVALID ASM BLOCK HEADER [KFC.C:23 11.2.0.1

BUG 13591322 – ORA-15196 AT BLOCK CORRUPTION 11.1.0.7

BUG 14676017 – NOT ABLE TO MOUNT ASM DISKGROUP ORA-15040 ORA-15042 11.2.0.3

BUG 14771123 – ORA-15335: ASM METADATA CORRUPTION DETECTED IN DISK GROUP 11.2.0.4

BUG 13952321 – ALL DBS DOWN DUE TO INVALID ASM BLOCK HEADER 11.2.0.1

BUG 14728558 – ASM REPORTED CORRUPTED METADATA & AT BLOCKS 11.1.0.7.0

对于该问题建议：

1、首先要检查 OS是否存在IO丢失的问题，例如 AIX上执行 errpt ，Linux查看os log 和dmesg

2、检查RAC的多个节点上存储设备名是否一致

3、考虑执行 ‘ alter diskgroup check norepair’来检查ASM diskgroup

4、11.2中如果遇到上述情况会自动使用amdu工具dump ASM disk其trace一般在ASM对应的user dump下，如NOTE: AMDU dump of disk group MAC created at /oracle/diag/asm/+asm/+ASM3/trace，整个AMDU trace里包含了很有用的信息，如果存在大量的AMDU-00209: Corrupt block found: Disk N0072 AU [26127] block [94] type [0]信息，和看到 Corrupt metadata blocks: 320 大量损坏的元数据块，则说明该问题一般是由于 OS层或者磁盘/存储硬件层引起的，因为不太可能有ASM的bug 会造成这么大量的损坏，解释成丢失更新 Lost Update也不合理

5、实际上如果你和我一样检阅过上面全部的BUG Note，你会发现没有个BUG note是最终定位为real bug的，这些SR/Bug Note最终要么不了了之，要么查出来确实是OS或者硬盘/存储有问题；所以对于这个问题提交SR的效率很低，往往找OS和存储厂商一起检查更有效率

6、如果你真的遇到了该问题，那么如果坏掉的元数据块(metadata block)比较少的话，可以请相关的ASM专家手工帮你修复，具体也可以找ASKMACLEAN专业数据库修复团队成员帮您恢复。切记不要在无备份ASM header的情况下操作，否则可能丢失恢复数据的最后一线希望。

You are here

【ASM数据恢复】ORA-15196: 无效的 ASM 块标头 [:] [] [] [] [ != ] ORA-15196 invalid ASM block header [kfc.c] [check_kfbh]错误解析