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For godsakes, listen to Cirkutz. ALL drives have had EFM since the first cdwriter was developed, it's part of the specification for how data is written/read. Safedisc 2 tries to feed the EFM mechanism a byte pattern that overflows a certain buffer, making the results deviate from what they should be. The protection checks for these results and complains if they differ. If I recall correctly, the trick is a kind of repeating pattern that would never occur in 'normal' data and that would cause the EFM to overflow and give back a different result. Now the fact is that each cdwriter has EFM, but some writers have a better EFM mechanism than others, those writers will give the correct result even when the copy protection patterns are used. In other words, those drives are immune to the bad patterns used in safedisc 2. Since what safedisc 2 does is essentially illegal (against the specifications of cdrom), it's no wonder that a lot of writers succumb to this. The writers that succeed are the two sheep drives you can find on CloneCD's webpage. The other drives also contain EFM only they fail when they get invalid data fed.
Now try to understand once and for all : ALL writers contain either a working EFM or a working EFM that can also survive the nasty data that safedisc 2 uses.
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