SUMMARY: Solaris/Veritas Not Reporting Bad Blocks

Solaris/Veritas did not report any bad block errors because the problem
was not with the disk but with the ORACLE database.

fsck is the tool to use to check the disk itself.

Thanks to all who responded!

Mark



Original Question:
-----------------

> 
> I have a situation where our ORACLE database reported corrupt data
> block on a particular file system, but Solaris and Veritas reported
> nothing.
> 
> This is the error from ORACLE:
> 
> Reread of blocknum=10348, file=/optp06/oradata/optp/users01.dbf. found same
> corrupt data 
> The trace file generated today, does indicate corruption: 
> Corrupt block relative dba: 0x004009cf (file 1, block 2511)
> Bad check value found during buffer read  Data in bad block - type: 6
> format: 2 rdba: 0x004009cf
> last change scn: 0x0000.00028efe seq: 0x1 flg: 0x04 consistency value in
> tail: 0x8efe0601
> check value in block header: 0xca7e, computed block checksum: 0x304 spare1:
> 0x0, spare2: 0x0, spare3: 0x0
> ***
> Reread of rdba: 0x004009cf (file 1, block 2511) found same corrupted data
> 
> I ran a fsck from Veritas VM on the file system in question and it
> reported no errors.  ORACLE's response to the problem was to build another
> file system and move the data, which did correct the problem.
> -------------------------------------------------------------------------
> Questions:
> ---------
> 
> 1. Why didn't Veritas VM or FS report any bad block problems?
> 
> 2. Is there a tool/utility that will do a more through checkout of
>    the file system?
> -------------------------------------------------------------------------
> 
> System/Software info:
> 
> H/W: TATUNG E450
> Solaris: 2.8 with latest patches
> Veritas VM: 3.1
> 
> Thanks,
> 
> Mark
> 
> -----------------------------------------------------
> Mark Hargrave, Sr. Unix Systems Administrator
> Lockheed Martin Space Systems Co. - Michoud Operations
> New Orleans, LA
> 
> E-Mail: hargrme@wisdom.maf.nasa.gov
> -----------------------------------------------------
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