Oracle ASM unable to find ASM disk header in some disks

Posted by PDSERVICE on Feb 05, 2016 In

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ASM unable to find ASM disk header in some disks.These headers (at least

5MB+) is zero filled in each disk (mpath218p1, mpath217).

I tried to see if disk start, end is relocated and these header can be found

in different offset of the same disk. But, it doesn't seem so. These data is not relocated. They are corrupted.

It is not issue at ASM/RDBMS level.

FURTHER PLANS:

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-ASM/RDBMS doesn't do zero fill. It is not issue at ASM/RDBMS level.

Given that 5mb+ is corrupted, it should have caused external to ORACLE.

-Please ask ct to check for following

-any manual error. someone inadvertently does dd if=/dev/zero' on these

disks

-any tools, scripts, 3rd party tools that might do such writes. If

there is no known applications/tool, please suggest ct to run some

monitoring tools that does write on the disks (something like fuser command

should help to list pid that have opened the disks.)

-Given that corruption occurred in same storage (ETL420), it might be

issue at storage level. please involve storage support to see if something

wrong at storage level.