SUMMARY : diskscan

From: Steve Franks (
Date: Thu Aug 21 1997 - 18:35:37 CDT

Fellow Sun Managers,

Thanks for the feedback on wiping my hard disks for return to vendor.

If I want GUARANTEED data destruction then military standard techniques
are :
* touch platter with iron-core magnet
* degause the surface in a degaussing oven
* have an accident with the drive

Also, professional data destoyers are available to those who want

For the rest :
* Format - perform (multiple) surface analysis at purge level followed
by repartitioning in standard configuration

* Diskscan has a destructive switch (-W) but it seems to be for x86
only. This is similar to the format option

* dd if=/dev/null of=/dev/dsk/mydisk

In general people felt that anyone with the technolgy and resources to
recover data from a formatted (or whatever disk) could compromise the
security of my company by other methods if they felt so inclined.

Thanks to :

Karl E. Vogel
Jim Harmon
Andrew Moffat
Marc S. Gibian
Tim Evans
Michael Zimmerman
Glenn Satchell
Birger A. Wathne
Ian TCollins
Danny Lee


Steve Franks
National Australia Bank, Midrange Services

1/216 Victoria Pde ph : (03) 9208-5794 E Melbourne, Victoria fax : (03) 9208-5023 Australia 3150 email : =================================================

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