146 Chapter 4 Service Tests and Utilities
Tests and Utilities
Secure Disk Erase provides three different levels of security:
• Non-Secure Fast Erase: all pointers to the information are erased. The information itself
remains on the hard disk until the disk space it occupies is needed for other purposes, and it is
then overwritten. While it remains on the disk, it is difficult for most people to access, but may
be accessed using software designed for the purpose. This is the normal method in which files
are erased on most computer systems; it is the fastest method but the least secure. This is the
default security level when using Secure Disk Erase.
• Secure Fast Erase: all pointers to the information are erased, and the information itself is
also overwritten with a fixed character pattern. This method is slower than Non-Secure Fast
Erase, but more secure. It may still be possible to access fragments of the erased information by
using special tools to detect residual magnetic traces.
• Secure Sanitizing Erase: all pointers to the information are erased, and the information
itself is repetitively overwritten using an algorithm designed to eliminate any residual traces.
This is the slowest method, but the most secure. Secure Sanitizing Erase meets the US Depart-
ment of Defense 5220-22.m requirements for clearing and sanitization of disk media.
Perform the Disk Wipe DoD 5330.22-M utility as follows:
1. In the Service Utilities submenu, scroll to “Disk Wipe DoD 5330.22-M” and press Enter.
2. In the Disk Wipe DoD 5330.22-M submenu, scroll to “Secure Sanitize Level” and press Enter.
3. In the Secure Sanitize Level submenu, scroll to the required Secure Sanitize Level and press Enter.
4. Press Back to return to the Disk Wipe DoD 5330.22-M submenu.
NOTE: Erasing the Hard Disk drive using either of the Secure Sanitize Levels is a very slow
process, 6 hours for the Secure Fast Erase mode and 40 hours for the Secure Sanitizing Erase
mode.
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