Symantec GHOST IMAGING FOUNDATION 7.1, Manual

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Table A-1 is an extract from Section 8-306 of the NISPOM.
Table A-1
Clearing and sanitizing a hard disk
Sanitize Clear Magnetic disk type
m a, b, c Bernoullis
m a, b, c Floppy disk
a,b,d,m c Non-removable rigid disk
a,b,d,m a,b,c Removable rigid disk
Where Clear is as follows:
Degauss with a Type I degausser a
Degauss with a Type II degausser b
Overwrite all addressable locations with a single character c
Overwrite all addressable locations with a character, its complement,
then a random character and verify
Note:
This method is not approved for sanitizing media that contains
Top Secret information.
d
Destroy (disintegrate, incinerate, pulverize, shred, or melt) m
Table A-2 lists the GDisk operations for clearing, sanitizing, or viewing a disk.
Table A-2
GDisk clearing, sanitizing or viewing operations
Description Operation
GDisk performs a clear operation, as defined by action c, as the
default disk-wipe operation. All addressable locations are
overwritten with 0x00. Clearing a disk
GDisk disk-wipe specifications
Clearing, sanitizing, and viewing hard disks
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