[Theoden]

C2 Fehler sollten 0 sein.

C1 Fehler schwanken je nach Rohlingqualität und Brenngeschwindigkeit, bei den Tevions sinds zb. über 30.000,
50 Fehler Durchschnitt (avg)

Edit:

Q: What are errors?

A: Errors, for the purposes of this discussion, refers to "read errors". They occur as a result of a problem in the process of reading those pits and lands. In one sense, the errors do not exist on the disc, but occur in the reading process. How a drive responds to those errors can vary a bit, and the result is that some drives are better at reading than others. Thus, a disc that causes read errors on one drive may not on another. Or the amount of errors may vary from one drive to another with the same disc. There are different types of errors, the most common of which are referred to as C1 and C2. A discussion of what these really are, how they are measured, etc. is not relevant here. In very general terms, C1 errors are the most common, and all discs cause them. They are corrected by the drive and do not generally cause any trouble. One measurement of a disc's quality can be the level of C1 errors that are occurring, less is better. However, even relatively high C1 rates are not usually the cause of any problems.

C2 errors can best be described as the next level of error. With these, a drive may have to re-read that sector to correct the error, slow down to read it, etc. Again, drives may differ in how they respond to this level of errors. If the drive slows, it may read a section with no C2 errors where it would report many C2 errors at full speed. So with some marginal discs, one drive may slow down and show no errors, another drive may read it at full speed with some errors, or another may read it at full speed with LOTS of errors. And again, here we are looking at a disc that may be unreadable in some drives. Most of us here feel that there is no acceptable amount of C2 errors on a disc, and the drive should be able to read a disc at full speed. It's also important to note that these are also corrected errors, and you should not see data corruption or failures in the reading process.

There is another level of error , (uncorrectable), that results in an unreadable sector. This produces corrupted data, possible read failures and maybe even a "coaster" that cannot be read at all. These are bad, and the worst part is that if you aren't testing your burns, you may not even know it's a bad disc or data has been corrupted. Again, there are many different designations and classifications of errors, but for our purposes, these 3 types are more than adequate to describe the situation and provide a means of comparing one disc to another.

Rohling Faq:
http://club.cdfreaks.com/showthread.php?t=61943