19.9. Backup Strategies

Original work by Lowell Gilbert.

The first requirement in devising a backup plan is to make sure that all of the following problems are covered:

Some systems will be best served by having each of these problems covered by a completely different technique. Except for strictly personal systems with low-value data, it is unlikely that one technique will cover all of them.

Some possible techniques include:

It is quite easy to come up with more techniques, many of them variations on the ones listed above. Specialized requirements usually lead to specialized techniques. For example, backing up a live database usually requires a method particular to the database software as an intermediate step. The important thing is to know which dangers should be protected against, and how each will be handled.

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