OT: disaster recovery

[Richard D. Williams]

In a Red Hat Enterprise environment, what would be the best disaster 
recovery configuration?  Money is no object.

Duplicate server?

Rsync?

Edge Backup and Recovery?

How can you reduce the size of the data loss window between backups or 
rsync?

Will rsync work when users are updating records?

Is there a way  to make sure files are not corrupted?

I am looking for any good ideas?

Thanks,

Richard D. Williams
The Applications Group