Dear Kevin and Connie,

Thanks for your tender advices.
After getting info about nodma mode from you, I tried x10 burning today.
Then, new Disc2 passed CD test successfully!
Last time my writing software chose x32 automatically.
x10 is the lowest speed in my case.

I'm ashamed of my poor trouble-shooting procedure.
I appreciate your replies.
I'd also like to try nodma mode writing for my learning.

nihno.com