Two safety nets are better than one

You regularly back up your important data. That’s good. You keep the backup at a separate location from the original data. Smart. You’ve even tested your procedures to make sure they’re reliable should you ever lose your original files. That’s great. You have a fail-proof system, right?

Not quite. What would you do if, after a data-deleting computer crash, you went to your backup only to find out that it, too, had suffered a serious malfunction?

There’s an easy way to prevent this scenario. Use two discs, tapes, or whatever your backup medium, and alternate between them. For example, if you back up weekly to CD, use the first CD in week one, the second CD in week two, the first CD in week three, and so on. Then you will always have two copies of your files, and the information will never be more than two weeks old.

Illustration © Digital Vision.

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