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To leave Commie, hyper to
http://commie.oy.com/commie_leaving.html
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Evan Tuer wrote on Wed, 10 Oct 2001 about following:
> This type of copy-protection is not new. The CD-info is recorded
> with crc-errors. Audio CD players have routines to skip or guess
> the bad info (so that they can deal with scratches or dirt on the
> CD), so you hardly notice it in the audio. From what I have read it
> seems that computer CD-Rom players don't have that feature, so
> they don't play, and can't read or copy the CD.
i still haven't had the time to check how it works, but there is
somewhat interesting copy protecting scheme on pc-cdrom games; they put
broken datatracks on cd and then do checks for bad tracks; this means
that pc-cdrom devices can handle somesort of bad info.
> But it's hardly a big deal against real CD pirates, or even the
> public once people write software to get around it. (I doubt it's
> difficult, just a matter of convincing the player to send raw data -
> the old SCSI CDROM in my Amiga could do it, at least.)
for copy protected games i described above i've been told that there is
software that can make copies of such disk, called clonecd. haven't had
any experience on that yet. and cdrwin can read raw data easily if the
drive supports it (at least most of the older drives do, even the
ide-drives should) and i have no idea how would unix utility dd behave
with such tracks.
> Still, who buys music on little plastic discs anymore? All the more
> reason to use Gnutella - thanks for the incentive, recording industry!
yeah, but i don't value mp3's as much as original records. i've been a
record collector for years and mp3's just aren't collectable the same
way.. :)
sakke
--
"The number of Unix installations has grown to 10, with more expected."
--The Unix Programmer's Manual, 2nd Edition, June, 1972
