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Posted by MassiveProng on 04/22/07 05:11
On Sun, 22 Apr 2007 03:39:49 GMT, "john smith"
<the_johnsmith@ntlworld.com> Gave us:
>
>"Jan B" <nospam@nospam.se> wrote in message
>news:mcfj23d1rctdhle906piu3e8b4hv0gkss7@4ax.com...
>>I think I have found a way to fully erase DVD+RW discs.
>> I haven't tried DVD-RW, but maybe you can try that Ron.
>>
>> I get, now and then, problems at or after erasing DVD+RW that results
>> i an unusable disc. The drives don't recognise it etc.
>>
>> The solution ?
>> I put the disc in the oven at 100 deg Celcius for 15 minutes!
>> (Just to be clear, NOT a microwave oven. Also note that 150 degC
>> destroys the disc.)
>>
>> After that, also the standalone recorder sees the disc "as new".
>>
>> I have so far tried only 3 discs, but it seems to be a systematically
>> working method (and yes new recordings work).
>> Both unsuccessful erases and discs with working content are "fully
>> erased" by this method.
>> /Jan
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>How the hell did you even come up with this bizarre "solution"?
>
It has actually been known about since the re-recordable disc was
invented by Tandy Corp.
The laser doesn't "burn" pits in the disc record layer. It merely
"impinges" on it. Heat relaxes the impingement. That's how the
"erase" mode works. The laser just stays on, and heats the entire
track evenly, relaxing the recorded data back to even. Formal
erasures, however, don't erase everything, just the data area, which
is why other readers/writers have problems with previously recorded
discs. The "heat 'em up" method relaxes the entire disc, rendering it
as if it had never had any data written to it.
It's actually old knowledge.
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