some strange: oracle 9i 9.2.0.6 fujitsu primecluster solaris 9 on node 2, i could not online file 24, due to file not found, but it really there (i'm using softlink to /dev/rdsk) ORA-01157: cannot identify/lock data file 24 - see DBWR trace file ORA-01110: data file 24: '/oradata/PRSMA/prsma_raw_system_10g' ORA-27041: unable to open file SVR4 Error: 6: No such device or address Additional information: 2 ORA-01186: file 24 failed verification tests ORA-01157: cannot identify/lock data file 24 - see DBWR trace file ORA-01110: data file 24: '/oradata/PRSMA/prsma_raw_system_10g' from node 1, it is OK. node 2 SQL> select status,error,format from v$datafile_header where file#=24; STATUS ERROR FORMAT ------- -------------------- ---------- ONLINE FILE NOT FOUND 0 node 1: SQL> select status,error,format from v$datafile_header where file#=24; STATUS ERROR FORMAT ------- -------------------- ---------- ONLINE 8 -- regards ujang -- //www.freelists.org/webpage/oracle-l