Source: InformationWeek
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Few people need to be convinced of how important it is to back up their data. However, the way that data is backed up -- and how reliable the backup is -- is just as vital. Imagine trying to restore the one backup copy you have of that irreplaceable Word document or spreadsheet only to find the disk you burned it to can't be read anymore.
In my case, I don't have to imagine that particular scenario: it happened to me. I lost over 5 GB of images that I had stored on a hard drive, and my one DVD-R backup couldn't be read at all. Thankfully the missing data was also backed up to another computer -- in itself an argument for the usefulness of remote backup.