Home News Reviews Forums Shop


Verifying burn integrity

Burn baby burn!

Verifying burn integrity

Postby Tonearm on Wed Apr 02, 2003 8:36 pm

What is the best way to find out how accurate an audio image burned onto a CD-R turned out compared to the original image file? Should an image of the burned CD-R be extracted and compared to the original file in EAC, or is there a better/easier test available in some software?
Tonearm
Buffer Underrun
 
Posts: 41
Joined: Mon Mar 17, 2003 1:40 am

Postby Tonearm on Thu Apr 03, 2003 7:00 pm

C'mon now. This has to be something you guys know about. :)
Tonearm
Buffer Underrun
 
Posts: 41
Joined: Mon Mar 17, 2003 1:40 am

Postby cfitz on Thu Apr 03, 2003 9:06 pm

If you really want to be sure, and don't trust the C2 error reporting capability of the drive with which you are testing the burned CD-R, then extracting the burned data with EAC and comparing it against the original data you extracted is probably the best choice for you.

For me, I am satisified if a pass through CD Speed or CD Doctor reports no C2 errors.

cfitz
cfitz
CD-RW Curmudgeon
 
Posts: 4572
Joined: Sat Jul 27, 2002 10:44 am

Postby Tonearm on Fri Apr 04, 2003 7:13 pm

I guess I just don't understand the difference between C1 and C2 errors. I tried the glossary at cdrinfo.com but that was no help at all.

What is the difference between the two, and why would you only be concerned with C2 errors?

Don't burning programs have some kind of a burn and verify option that should take care of figuring out if the copy is perfect or not?
Tonearm
Buffer Underrun
 
Posts: 41
Joined: Mon Mar 17, 2003 1:40 am

Postby cfitz on Fri Apr 04, 2003 7:58 pm

Tonearm wrote:I guess I just don't understand the difference between C1 and C2 errors. I tried the glossary at cdrinfo.com but that was no help at all.

Well, consulting cdrinfo was your first mistake... :wink:

Tonearm wrote:What is the difference between the two, and why would you only be concerned with C2 errors?

Here is some reading material:

http://www.cdrlabs.com/phpBB/viewtopic. ... 9056#59056

One should not only be concerned with C2 errors, but they are more of a concern since they represent a more serious error, and, in a CD-DA disc, errors can be audible if not corrected at the C2 level. C1 errors are never audible directly, since the C2 layer gets a chance to correct anything the C1 level could not.

Tonearm wrote:Don't burning programs have some kind of a burn and verify option that should take care of figuring out if the copy is perfect or not?

Such features typically apply only to ISO 9660 data discs. And even that type of testing doesn't tell the whole picture if you are concerned about the lower-level burn quality, because many low-level problems can be corrected by the three levels of error correction on a data disc. Why should you be concerned about the lower-level burn quality if the error correction successfully corrects all the errors? Because the more work the error correction has to do to correct the errors of the freshly burned disc, the less margin there is to correct additional errors that may show up as the disc ages and becomes scratched.

cfitz
cfitz
CD-RW Curmudgeon
 
Posts: 4572
Joined: Sat Jul 27, 2002 10:44 am

Postby Tonearm on Sat Apr 05, 2003 12:29 am

Thanks for the info. That's a great link.
Tonearm
Buffer Underrun
 
Posts: 41
Joined: Mon Mar 17, 2003 1:40 am

Postby cfitz on Sat Apr 05, 2003 1:18 am

You're welcome.

cfitz
cfitz
CD-RW Curmudgeon
 
Posts: 4572
Joined: Sat Jul 27, 2002 10:44 am


Return to CD-R/CD-RW Drives

Who is online

Users browsing this forum: No registered users and 1 guest

All Content is Copyright (c) 2001-2017 CDRLabs Inc.