Should I read at lower speeds?

[IceBreaker]

Originally posted by Machina
Seems like I know what is going now...
Well, going to try BlindWrite
But then, how is it that other people created perfect images of BF1942 with Alcohl 120%? Is it ever going to support the pregap thing?
...

I Xplained it! The backups created using only Whisky 120%, although they were NOT 1:1, worked only because the drives they were tested in did not support pregap reading (that's the only reason I can think of) -> games sees that drive can't read pregap -> game can't check pregap -> game skips pregap check.

...
I am so confused about all this copying...
Its 0s and 1s, used as gaps - why is it so hard to make something that can read 0s and 1s and copy them in the exact same order and position?

I'm more of a newbie in the matter, but as far as I know:
Unlike RAW writing, which really IS raw (ie. drive writes without bothering about the data it is writing), RAW reading cannot be 100% raw since the reader HAS to "understand" to a small extent what is being read, mainly to tell the difference between real read errors due to scratches etc.. (which can sometimes be corrected by the reader thanks to EFM modulation) and deliberate (C2) errors which must be copied 'as are', without correction. Part of the subchannel data must also be interpreted by the reader (thus not read in RAW fashion), such as sector position on CD - and Tagès scheme makes use of this

So U C, the closest on can get real RAW-reading is perhaps by switching off reader's hardware error-correction (if it allows it) - but in doing so, unless you have a CD-ROM in PERFECT state AND you read at 1x, you're bound to end up with a sh*tload of errors in your image file...