Data Destroyer
Section 6: Listing files and estimating purge time

After the files to be purged, and the type of purge, have been specified an estimate of how long the operation will take is given by the List files, estimate time facility. When subfolders are not included the files to be purged are listed.

The sum of the file sizes is reported, and an estimate is made of the time that the purge will require, based on the total of the file sizes, the number of files (one large file is purged more quickly than many small files) and the number of overwrites of each file (which is implied by the type of purge currently selected). An estimate can be provided only after the purge speed has been tested (as described in Testing purge speed). Once this has been done, the Estimate time facility will make use of this information, calculating estimated times for various numbers of overwrites (up to 30).

When subfolders are included then there is an option to display the names of the folders or not. When there are very many subfolders then it is advisable not to display folder names so that the report buffer does not fill up (if this happens then the listing stops and the estimate cannot be made properly).

Next: Refining and confirming the purge operation
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