It actually is depending on what burning software you use. I have DVDXCopy Platinum. Not the best or easiest to use, but it definitely requires that you do not put the DVDRW on the same IDE as the HDD. We (the Platinum users community) found this out the hard way after a lot of trouble shooting.
Don't know if Shrink is that buggy or concerned.
But, isn't it true that even with today's controlers, the optical drive will bring the speed down on the HDD?
Pavelow
Dell 8250, i850e, 4xAGP, 2.4ghzCPU, 512mbPC1066RDRAM, 120gbATA, GeF4MX420, SBL5.1, SamSung 48xCDRW, LiteOn 851S DVDRW
RJ-45 to Compaq 9660, 233mhzCPU, 104mbFPRAM, 12mbVoodoo2, Win95a