Re: Help with database corruption issue
- From: Steve Montgomerie <stmontgo@xxxxxxxxx>
- To: pjhoraclel@xxxxxxxxx
- Date: Sat, 4 Aug 2012 23:24:11 -0400
Thanks List!
Dennis and Peter,
We could start 19 of 20 databases. When we tried to start database X,
it would lock up the mount point,
would not open, and would hang all of the other 19 databases.
The actual error points to software corruption. Something like running
fsck against a mounted file system.
SA swears he did not do that we believe him.
In regards to the error it points to s system utility that detects a
bad block and then tries to fix it which ends
up with the header information being zeroed out of some blocks.
The only thing that makes sense to me, is that the CP command somehow
rebuilt the header information
of the bad blocks. Is that possible?
On Fri, Aug 3, 2012 at 6:49 AM, Peter Hitchman <pjhoraclel@xxxxxxxxx> wrote:
> Hi,
> Well for some reason the ext4 file system had errors, leading to lost
> data. That impacts the undo tablespace data file and Oracle could not
> recover. All I can think is that at some point in time the ext4 file
> system was not 100% OK and then when you made the data file copy is
> had been fixed. What sort of disk layout do you have, maybe the error
> was corrected by way of a disk mirror or some other RAID set-up
> protection?
>
> Regards
> Pete
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>
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