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Reading Damaged CD-ROM Discs

I am going to finish the CD-related part of the review by checking the error correction mechanisms of the drives. The compact disc is a delicate data medium, so the optical drive always has something to correct. Let’s check out how good the tested drives are at that.

Damaged CD read graphs

 
AOpen COM5232/AAH (firmware 1.05)

 
AOpen COM5232/AAH (firmware 1.09)

 
Samsung SM-352N

 
Samsung TS-H492A

The firmware update does not affect the error correction capabilities of the AOpen drive. It performs reading in the same manner as before, and the number of unread blocks remains the same – 5 in both cases. The only difference is that version 1.09 took half a minute more to read the disc (5min10sec instead of 4min41sec). Both drives from Samsung use the same reading algorithm, and the TS-H492A handles the task faster than its predecessor: 4min56sec against 5min38sec. The number of unread blocks is 3 and 4, respectively.

Overall, the drives were all successful in this test. The new device from Samsung, the TS-H492A model, handled the damaged CD-ROM best of all – in the least time and with fewest errors – although the AOpen seems to be accelerating faster at first sight.

 
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