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1954309 - Oracle cannot read the controlfile during the startup


You start the OracleService<SID> in the Windows Service Manager but the database is still not up. When trying to start it in the command line with you get the following:

SQL> startup
ORACLE instance started.

Total System Global Area 4175720448 bytes
Fixed Size                  2261720 bytes
Variable Size            2097155368 bytes
Database Buffers         2063597568 bytes
Redo Buffers               12705792 bytes
ORA-00221: error on write to control file
ORA-00206: error in writing (block 1, # blocks 1) of control file
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 5) Access is denied.



  • SAP any version
  • Oracle any version
  • Windows Platforms


microsoft windows nt 2012 services startup fails error oracle database sysdba sqlplus crash , KBA , BC-DB-ORA , Oracle , Problem

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