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Good question! I assume a kind of hierachy of risk and backup accordingly. I assess my risks as follows:
- risk of bad crash, silly mistake, etc wiping out UR database quite high
- risk of hard disk malfunctioning or being stolen. Much less high, but still appreciable.
- risk of losing all backups around the place - much smaller still.
So I deal with the first level risk by backing up UR to the SAME hard disk at least daily and retaining copies for 20 days so that I have 20 earlier versions.
The second level risk I counter with a weekly backup to rotating external disks. That includes backing up the daily backups.
The third risk I counter by having (sometimes rather old) data offsite.
Much of my data is in fact duplicated in Gmail and that also provides a form of backup externally.
I have thought about backing up UR online, but am not sure if that is really the way to go.
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So, the "hole" in my backup strategy is anything shorter than a day. At least, I hope that's the only hole!
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