In Vista these two worked as expected but once in W7, they've been acting up since. Since using W7, looking in Nero 9 InfoTool showed the first drive - Read Speed 48x and Write Speed 16x while the second drive showed up as Read Speed 12x and Write Speed N/A. I've flashed them both to the latest firmware 1.06 and no change. I can't copy CD/DVD's or make a CD/DVD on the fly. Only thing worked was making the image file first then burning it separately after. In the meantime, to see if it makes a difference, I've ordered two new Samsung SH-S223L's (SATA) from eBay after reading numerous reviews.