Read more to learn about how the DoD data overwriting standard applies today. This “3-pass” procedure is designed to prevent data from being recovered by commercially available processes.īut is the DoD 5220.22-M standard ((or, the longer DoD 5220.22-M ECE standard) the best wiping method for your organization? It must then be followed by verification. Destroy renders Target Data recovery infeasible using state-of-the-art laboratory techniques and results in the subsequent inability to use the media for storage of data.When vendors state that their solutions meet the DoD 5220.22-M “standard,” it typically means that their software will write to all addressable hard drive locations with a character, its complement and a random character.Purge applies physical or logical techniques that render Target Data recovery infeasible using state-of-the-art laboratory techniques. For protection against simple non-invasive data recovery techniques typically applied through the standard Read and Write commands to the storage device, such as by rewriting with a new value or using a menu option to reset the device to the factory state (where rewriting is not supported). The sanitization categories are defined as:Ĭlear applies logical techniques to sanitize data in all user-addressable storage locations. NIST 800-88r1 guideline: NIST Special Publication 800-88 - Guidelines for Media Sanitization states the following:Ĭlear, Purge, and Destroy are actions that can be taken to sanitize media.
The result will be a Purge, or a Clear, depending on the media type (rotating hard drive, or solid state drive (SSD)) ( Table 1). The BIOS does not control the drive behavior once the wipe commands are issued to the drive.ĭepending on the media, different commands are issued. The BIOS is only issuing the command, and not directly telling the drive how to perform the command. The drive manufacturer will implement the wipe behavior to meet the National Institute of Standards and Technology (NIST) specification. Dell Data wipe issues the commands in the table below to the hard drive. In general, the sanitize requirements that are pasted below are manufacture implementation requirements.
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