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Degaussers are rated based on the type (i.e., low energy or high energy) of magnetic media they can erase. Degaussers have two different mechanisms: strong magnet and electromagnetic. Degaussing can be an effective method for sanitizing damaged media, for sanitizing media with exceptionally large storage capacities, or for quickly sanitizing diskettes. Degaussing is not effective for sanitizing nonmagnetic media, such as optical media.
- NIST Special Publication 800-36, at 44.