NIST SP 800-88
The US guideline for sanitizing storage media. It names three levels: Clear (overwrite the drive using normal write commands), Purge (stronger methods, such as the drive's own erase command), and Destroy (physical destruction). IQValidate overwrites drives today, so its wipes are recorded as Clear. A wipe is recorded as Purge only when the agent runs the drive's own erase command and the checks afterwards pass. That is rolling out with agent support.
