As a side note - and to be picky - degaussers are AFAIK not really-really "certified" by NSA, they are only listed:
https://www.nsa.gov/Portals/70/documents/resources/everyone/...
With what looks like a disclaimer: > The Degausser EPL (Evaluated Products List) specifies the current models of commercial equipment that satisfy NSA/ CSS requirements for erasure of magnetic storage devices retaining any level of classifed or sensitive data. Listing on the Degausser EPL does not constitute endorsement of the product by the USG or NSA/CSS; it only states that the evaluated degausser has met the applicable NSA/CSS performance requirements. Neither does the listing guarantee continued performance; customers should have their equipment re-tested periodically according to the manufacturer’s recommendations.
https://en.wikipedia.org/wiki/CBL_Data_Shredder
From 2007, still senselessly using unneded algorithms/methods.
Assuming that they are recent enough disks (like built in the last - say - 20 years) all you need is to initiate an ATA Secure Erase, i.e. essentially use hdparm:
https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase
or any small live distro making use of it, a suggested one is RIP Linux (now abandoned, but usually just good enough): https://tinyapps.org/docs/wipe_drives_hdparm.html https://archiveos.org/rip/
Initiating the ATA command will be faster than any 00 or random pattern writing tool such as dd (which is however, single pass, good enough according to NIST):
https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.S...
(page 32)