ORA-27086: skgfglk: unable to lock file - already in use

1. remove */dbs/lkORACLE_SID file
2. You will get an error like this
ORA-00202: controlfile: '/oebs200/u01/oracle/PROD/testdata/cntrl01.dbf' ORA-27086: skgfglk: unable to lock file - already in use IBM AIX RISC System/6000 Error: 13: Permission denied on controlfiles and datafiles
3. Copy (not move) controlfile and datafiles to new path
4. Remove old files
5. Restore old files from copied on step 3.