IDE DVD, SCSI Emulation and DMA

I have an IDE DVDRW drive and am trying to improve the speed of reading CD when ripping with Grip.
My system seems to see the drive as if it were SCSI using Yast Hardware Information (/dev/sg4). I can see nothing about DMA and am not even sure this will be relevant with the driver being used.
Could somebody please advise. Also what speed should I expect when ripping? Grip is reporting from 4x to 7x as it progresses through the tracks. I am sure I had achieved much faster than this in an older machine.

4x to 7x is fairly good actually. It’s drive model dependent, apparently.