DRW 1004 and UDMA 66

I never notice this until recently.

When my pc is booting up, my MB says that DRW 1004 is running at UDMA 66, instead of UDMA 33 in the spec sheet.

Now I’m wondering if it’s normal and if it affects the write quality in anyway.

This is quite normal. The BTC burner is an UDMA66 device - the spec sheet is wrong!