[iconoclast]

zemlin,

Hello. I understand what you mean by backing up on all accounts and am guilty myself. Sadly the ways to guard against human error are few and imperfect.. haha
However mirrored RAID arrays safeguard against disk failure, of which there is much. Esp nowadays it seems to me, disks are more prone to failure. Data recovery on a failed disk is very expensive, more so than buying an extra drive for mirroring. The thing I like best about mirrored RAID is that it dosn't rely on human interaction.
Ofcourse this method dosn't protect against human error, fire or theft of ones computer, that's why multiple strategies of back up and redundance should be taken at different steps of the workflow.