Guys, redolog errors appeared in alert.log and lgwr trace with "STALE" but = "CURRENT" redo log group. I did an alter system switch logfile which = switch to a different online log and since there is a checkpoint then = maybe things aren't so bad. However, there is a dbwr trace with the following: KCF: write/open error block=3D0x7d94 online=3D1 file=3D14 /u04/CSTAT/cstat_bidx01.dbf error=3D27063 txt: 'SVR4 Error: 5: I/O error Additional information: -1 Additional information: 4096' Automatic datafile offline due to write error on file 14: /u04/CSTAT/cstat_bidx01.dbf Looks like a datafile (ndx) went offline due to I/O error. However, is = this a corruption error or something else? Also, what is the quickest = way to check the status on my other files - it has been a long time. Thanks, Paula ---------------------------------------------------------------- Please see the official ORACLE-L FAQ: http://www.orafaq.com ---------------------------------------------------------------- To unsubscribe send email to: oracle-l-request@xxxxxxxxxxxxx put 'unsubscribe' in the subject line. -- Archives are at //www.freelists.org/archives/oracle-l/ FAQ is at //www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------