DoD 5220.22-M

How to erase hard drive? Windows7 logo   How to erase hard drive? Intel logo

Standard DoD 5220.22-M, US DoD 5220.22-M (ECE)

US Department of Defense in the clearing and sanitizing standard DoD 5220.22-M recommends the approach "Overwrite all addressable locations with a character, its complement, then a random character and verify" (see table with comments) for clearing and sanitizing information on a writable media.

To conform this security standard in Active@ KillDisk Professional version this approach has been implemented, i.e. triple data overwriting for the destruction of remains of sensitive data.

US Department of Defense 5220.22-M Clearing and Sanitization Matrix

Media Clear Sanitize
Magnetic Tape1
Type I a or b a, b, or m
Type II a or b b or m
Type III a or b m
Magnetic Disk
Bernoullis a, b, or c m
USBs(floppys) a or b b or m
Non-Removable Rigid Disk c a, b, d , or m
Removable Rigid Disk a, b, or c a, b, d , or m
Optical Disk
Read Many, Write Many c m
Read Only   m,n
Write Once, Read Many (Worm)   m, n
Dynamic Random Access memory (DRAM) c or g c, g, or m
Electronically Alterable PROM (EAPROM) i j or m
Electronically Erasable PROM (EEPROM) i h or m
Erasable Programmable (ROM (EPROM) k l, then c, or m
Flash EPROM (FEPROM) i c then i, or m
Programmable ROM (PROM) c m
Magnetic Bubble Memory c a, b, c, or m
Magnetic Core Memory c a, b, e, or m
Magnetic Plated Wire c c and f, or m
Magnetic Resistive Memory c m
Nonvolatile RAM (NOVRAM) c or g c, g, or m
Read Only Memory ROM   m
Static Random Access Memory (SRAM) c or g c and f, g, or m
Cathode Ray Tube (CRT) g q
Impact g p then g
Laser g o then g

a. Degauss with a Type I degausser

b. Degauss with a Type II degausser.

c. Overwrite all addressable locations with a single character.

d. Overwrite all addressable locations with a character, its complement, then a random character and verify.

e. Overwrite all addressable locations with a character, its complement, then a random character.

f. Each overwrite must reside in memory for a period longer than the classified data resided.

g. Remove all power to include battery power.

h. Overwrite all locations with a random pattern, all locations with binary zeros, all locations with binary ones.

i. Perform a full chip erase as per manufacturer's data sheets.

j. Perform i above, then c above, a total of three times.

k. Perform an ultraviolet erase according to manufacturer's recommendation.

l. Perform k above, but increase time by a factor of three.

m. Destroy - Disintegrate, incinerate, pulverize, shred, or melt.

n. Destruction required only if classified information is contained.

o. Run five pages of unclassified text (font test acceptable).

p. Ribbons must be destroyed. Platens must be cleaned.

q. Inspect and/or test screen surface for evidence of burned-in information. If present, the cathode ray tube must be destroyed.

This document is available in PDF format, which requires Adobe® Acrobat® Reader
(Free download):

Size: 494 KB

Size: 714 KB

USER'S GUIDE (for Linux)
Size: 683 KB

KillDisk Datasheet
Size: 2,44 MB

Data Recovery

Data Utility

Data Security

Data Backup

CD/DVD Tools

sales @
+1 (877) 477-3553
+1 (905) 812-8434

LSoft Technologies Inc.
2550 Argentia Road, Suite 218
Mississauga, Ontario
L5N 5R1

© 2017 LSoft Technologies Inc.