Read Performance Part III - Scratched CDs
To check the drive's error correction, we use an original CD that we specially prepared by making a V-shaped scratch across it.
Quite a few drives will simply throw up their hands in horror at a scratch like this.
We test the surface of the disk for damage or unreadable sectors using Nero CD Speed's scan function.
All sectors are read without errors. Only 7.05% are reported as damaged. The GCE-8400B provides a slightly better result. Both drives therefore have a good error correction capability.
|Error-CD||Good Sectors||Damaged Sectors||Unreadable Sectors|
|Waitec Frisby II||91,44%||8,56%||0,00%|
The "CD Quality Check" graph shows that the drive takes the "problem area" in its stride.
The vertical, yellow lines indicate areas with damaged sectors. The transfer rate drops when the faulty sectors are read but it recovers quickly and continues to read the CD.