Has any DBA lost their database due to any kind of failure?

Just to know
Has anyone lost the database or any data in the database so far due to any kind
of failure?
Anybody invloved in Mission critical Database recovery..
Share your thoughts and experience ...May be helpful for guys like me

I hope no one did so..
A DBA's primary responsibility is the availability of his database, if someone looses data that will be a black spot following you during your entire career I guess.
So better to study these resources;
http://download.oracle.com/docs/cd/B19306_01/server.102/b25159/toc.htm
Oracle® Database High Availability Best Practices 10g Release 2 (10.2) Guide
http://download.oracle.com/docs/cd/B19306_01/backup.102/b14191/toc.htm
Oracle® Database Backup and Recovery Advanced User's Guide 10g Release 2 (10.2) Guide
All practices mentioned in above resources affect the availability, performance and mean time to recover(MTTR) of your database.

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