Very slow reading audio from SCSI CD/DVD drive

Hi, For some reason ripping audio from my SCSI DVD drive (Toshiba SM-1401) is painfully slow. I would have imagined that CD-DA extraction would be well up there, but it's clearly below 1x speed taking roughly 1.5 hrs to rip a 74min CD. I tried it under windows and everything ran smoothly at 8x speed. Anyone know of any reasons, or preferably solutions?! TIA RikD.