About wiping if the device provides internal ATA commands Secure Erase and/or Sanitize, use them.
It will be faster(and approved by NIST).
See:
http://csrc.nist.gov/publications/nistpubs/800-88/NISTSP800-88_with-errata.pdf
http://csrc.nist.gov/publications/drafts/800-88-rev1/sp800_88_r1_draft.pdf
I doubt that NIST can/will (ever) "certify" or "approve" a software write blocker <img src="images/smiles/icon_eek.gif" alt="Shocked" title="Shocked" /> or that it will do so in a timely fashiion:
http://www.cftt.nist.gov/software_write_block.htm
at the most it will test it and publish the result, with a disclaimer such as:
Quote::
It documents results against four top-level tool requirements identified by the specification and several test assertions related to those requirements, describes the testing environment, provides an interpretation of the test results, and includes test results summary log files for numerous test cases. The results provide the information necessary for developers to improve tools, users to make informed choices, and the legal community and others to understand the tools' capabilities.
jaclaz
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