There can never be enough talk about backups...(I learned my lesson 22 years ago when a coworker was formating a floppy drive and mistakenly reformated my enormous 10mb HD).
UR does not contain all the important information I wish to protect- like my financial information in Quicken/Quickbooks and stuff I have chosen to link UR to. So I need a comprehensive solution to data protection. I prefer to buy specialized backup software that allows me to easily address all of this data as well as backup across the net. (FYI - I use SyncbackSE)
From a data integrity standpoint, UR itself has been very reliable. The undo and recycle bin have protected me from myself. I have developed a good deal of confidence in it.
After reading Google's HD failure experience I became more worried about my desktop. The failures were not predictable and much worse than I expected from the manufacturer's MTBF specs. My portable computer is at high risk so I expect failure (or loss) and plan accordingly.
In my experience Windows on a given system always becomes less reliable with time and benefits from a reinstallation. So as my system ages, I increase the frequency of backup.
I too am considering backing up "online" vs my monthly trip with my USB HD to the bank's vault. Today's muse is Amazons S3 storage using JungleDisk's maped drive.
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