ORA-27072

[Shibu]

Hi all..........   My database is going down frequently  showing this error in alertfile . This  is happening to different datafiles and controlfiles. What are the possibilities that cause this error ? How can i avoid this error ?   oracle 8.1.7 in win2k     Errors in file C:\oracle\admin\acusis\bdump\acusisCKPT.TRC: ORA-00206: error in writing (block 3, # blocks 1) of controlfile ORA-00202: controlfile: 'D:\ORADATA\CONTROL01.CTL' 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.   regards,   shibu