As per the link i posted above, you can see your code means 5 / 21 / 02 INVALID ADDRESS FOR WRITE"
Searching the WWW for this shows it can be bad media. You have tried some different brands, though an old / dieing burner can show these signs as well.
Would suggest researching the above error code and your optical drive model name. Some common exmaples,
- You might need a firmware upgrade -
- Your power supply could be on the way out
- Try putting the optical drive on the IDE primary channel
- Try using a demo version of Nero for troubleshooting
Hope this helps
M