Oracle : Ошибка ORA-01221

"data file %s is not the same file to a background process"
*Cause: When the database writer opens the data file, it is accessing a
different physical file than the foreground doing the recovery.
The timestamp set in the file header by the foreground was not
found by the background. It may be that the background process
could not read the file at all.
*Action: Look in the DBWR trace file for the error it recieved when
attempting to read the file header. Reconfigure the operating
system as needed to have the file name successfully access the
same file when opened by a background process.

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