Speed problem?



I have a 40125W drive.When I try to backup a Safe Disk 2 game with clonecd,the speed is about 0.63X for bad sectors and then when the bad sectors are skipped the reading speed is only 12X.Is this normal?
(PS:I use the game profile)


When the drive is forced to read at slow speeds(when there is bad sectors and such) it may sometimes have problems speeding up to more than 12X afterwards.


Thank for the answer OC-Freak.
Another strange thing:when I try to backup a SD 2.51 game with blindread without sub Pw, the speed could go up to 48X but when I do the same with Pw the speed goes up to only 12X.
Any idea how to remain this?