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midrange.com
To be even more effective you need to write more bit patterns:
01010101
10101010
And just for fun:
00110011
11001100
etc. etc. I think the DOD requirements include bit patterns and a
number of over-writes. Or a sledge hammer or drill!
As I understand the problem with erasing disks, it's the thermal expansion and contraction that causes incomplete erasure of the edges of the tracks-- because the heads aren't perfectly aligned with the track. And those 'fringes' are the bits (: that can be read under extremely special circumstances.
So maybe you need to chill the computer room to near-freezing, run the program, then let it creep up to 100 degrees or so and repeat, just to get the fringes!
In any event:
Write
etirW
repeat
--Paul E Musselman
PaulMmn@xxxxxxxxxxxxxxxxxxxx
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