Dear Gurus, I have been running my database in noarchive mode and I want to switch to Archivelog mode. I am running Oracle 7.3.4. I have three groups of redo logs that are 20MB each. My question is what happens to filled online redo logs during a hot/online backup?? My fear is my database could hang when all redo logs fill up before my backup completes because it usually takes 2-3 hours (backup) to complete? and my log switches occur in 15-20 mins. TIA Regards --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.742 / Virus Database: 495 - Release Date: 2004-08-19 -- //www.freelists.org/webpage/oracle-l