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OCSSD Reports "clssnmvDiskVerify: TOC format mismatch expected(0x634c7373 0x546f636b), found(0x0000 0x0000) " on ASMLIB With 4K Sector Size Disks (Doc ID 2508243.1)

Last updated on JANUARY 06, 2020

Applies to:

Oracle Database - Standard Edition - Version and later
Information in this document applies to any platform.



o Two node cluster, One node is up and running but the second node fails to start

o Environment is having 512e disks, and originally the ASM diskgroups were created with 4k sector size.

o Dumping the Voting File (VF) signature using kfed and dd confirms the VF structures are found in the voting files.

o ASMLIB was configured properly with ORACLEASM_USE_LOGICAL_BLOCK_SIZE=true

o ocssd log (inside <ORACLE_BASE>/diag/crs/<HOSTNAME>/crs/trace location) is reporting:

CLSF:3780790016: Opened hdl:0x7f8da42b1d00 for dev:/dev/oracleasm/disks/<DISK>: 


CSSD:3401393920: clssnmvDiskVerify: TOC format mismatch expected(0x634c7373 0x546f636b), found(0x0000 0x0000)


CSSD:3401393920: clssnmCompleteInitVFDiscovery: Completing initial voting file discovery

CSSD:3401393920: clssnmvFindInitialConfigs: No voting files found


Second node was bounced


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