pranav81 wrote: The writer is not capable of returning C2 errors,but according to CD Speed Read Test the CD was readable with no problems.
If the writer doesn't return C2 errors, then CD Speed ScanDisc has nothing to work with to evaluate the quality of the disc. The only thing that might be useful is to try the CD Quality Test and note whether the drive slows down when reading. C2 errors will not be measured, but if the drive slows down while reading this is an indication that they are present.
When you state that the discs burn perfectly, this is no guarantee that they may not have a high error rate revealed when tested with a device that returns C2 errors.