Last updated on MAY 13, 2013
Applies to:Oracle Server - Enterprise Edition - Version: 188.8.131.52 to 10.2.0.4
- When RAC is used, O_DIRECT is the default option to open files in NFS. However, there are some cases where O_DIRECT is not used and the database may lose a write. For this case the NFS mount point options are in accordance with <<Note 359515.1>>
- There is another case that is specific to HP when NFS is used without the forcedirectio IO option where the database may end up losing IO.
- Lost IO may cause different errors like:
ORA-600  in a media recovery
ORA-1499 on "analyze table validate structure cascade"
ORA-8102 on delete/update
- Some of these errors are signs of logical corruptions on undo segments, redo log files and inconsistencies between tables and indexes.
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