Quote:
Originally posted by gh0sth@cker
If you read here it shows that when using the BWA no emulation is needed. If i remember it's to do with the Twinsector technique (Twinpeaks). But it invariably is not a 1:1 copy due to the linear density not being replicated.
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OK thx 4 the info checked out the thread, indeed it is confirmed, when burning a BW image+BWA file (using Litey), no further emulation is needed. I wonder if Alcohol 120 with MDS file would works likewise, though...
As far as I remember, 'twin-sectors' has nothing to do with the Securom protection. Twin-sectors are used only by the Tagès scheme, which is a purely "software" protection involving modified subchannels. Like Securom, Tagès is difficult to read (but not for the same reason), if not impossible with standard software, however unlike Securom, it is extremely easy to write, as explained in this very interesting
discussion 
So mystery remains whole, for the thread U refered to doesn't explain
how this works.
- No emulator whatsoever running in the background
- The CD-R backup has a
constant linear density
Unless... unless Blindwrite
writes twin-sectors (identical sectors, including Q subchannel) to trick the game into thinking that the "virtual density" being thus read on the backup corresponds to that of the original CD. So it's as though BW were actually writing a Tagès scheme on the disk! Hmm, that's clever
