Ok, i have a 1213s@1653s using the CS0M firmware with omnipatcher. It refuses to burn "-" media. It starts to burn and then stops within less then a minute. Nero says "recording error". On toast in Linux it says "record procedure failed". And Again this happens within less then a minute after recording.
Next i have a 1673s@1693s using the KS04 firmware with omnipatcher. I have the same problem as with my 1213s but with this burner its with "+" media. Exactly the same.
I have not tried the factory firmwares for my drives, but they both worked fine with the 1213s@1653s with CSTJ and 1673s with JS05. Nothing is overclocked. I just use omnipatcher to enable crossflashing.
The media for both are ridata brand. the - is RITEKG04-R and the + is RITEKR03-02+R.