Symantec GHOST IMAGING FOUNDATION 7.1 - V1.0 Manual page 126

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