OSD-04008: WriteFile() failure, unable to write to file

http://www.shutdownabort.com/errors/OSD-04008.php

ORA-00221: error on write to controlfile
ORA-00206: error in writing (block 3, # blocks 1) of controlfile
ORA-00202: controlfile: 'file_path'
ORA-27072: skgfdisp: I/O error
OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 33) The process cannot access the file because another process has
locked a portion of the file.

CKPT: terminating instance due to error 221
ORA-00221: error on write to controlfile

Instance terminated by LGWR, pid = 1376

And here is how to set the Oracle Agent from Symantec Backup Exec correctly:



During a backup of an on-line Oracle Database, one or more Datafiles are locked and subsequently corrupted.
http://seer.entsupport.symantec.com/docs/231519.htm