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Home > Hardware Reviews > Optical Storage > 40x CD-RW

Friday, November 22, 2002
AOpen EHW4048U CD-RW

3. CloneCD Reading Tests

AOpen EHW-4048U CD-RW - Page 3

Error Correction Tests

In the following tests we examine the reading error correction capabilities of AOpen EHW-4048U.

- EAC CD-R Test Disc

- Test Results (Max Reading)

Errors total
Num: 26320
Errors (Loudness) dB(A)
Num: 8649
Avg:-83.6 dB(A)
Max: -13.0 dB(A)
Error Muting Samples
Num: 122
Avg:1.7 Samples
Max: 5 Samples
Skips Samples
Num: 0
Avg: 0 Samples
Max:0 Samples
Total Test Result
81.2 points (of 100.0 maximum)

Despite the fact that the drive did not corrected the data from neither the black triangle defect nor the five scratched areas, the amount of total errors is not very high and the average error level is only -83.6dB(A). The drive also didn't skip any samples resulting to an overall score of 81.2 out of 100 (perfect), which is quite good.

- ABEX TCD-721R

- Test Results (Max speed)

Errors total
Num: 75364191
Errors (Loudness) dB(A)
Num: 391474
Avg:-28.5 dB(A)
Max: -1.6 dB(A)
Error Muting Samples
Num: 199092
Avg: 19.8 Samples
Max: 3584 Samples
Skips Samples
Num: 2
Avg: 2939.0 Samples
Max: 2939 Samples
Total Test Result
51.2 points (of 100.0 maximum)

The ABEX 721R test disc is very hard to read for almost all the drives. The AOpen EHW-4048U showed a bad behavior since it started reporting errors before the artificially defected area begin. The error spikes reached -1.6 dB(a) in several areas and many skipped samples occurred. The performance is low (51.2 points).

- ABEX TCD-726

- Test Results (Max Speed)

Errors total
Num: 140018342
Errors (Loudness) dB(A)
Num: 654784
Avg:-23.7 dB(A)
Max: -5.5 dB(A)
Error Muting Samples
Num: 288703
Avg: 4.0 Samples
Max: 3584
Skips Samples
Num: 1
Avg: 409 Samples
Max: 409 Samples
Total Test Result
57.4 points (of 100.0 maximum)

The AOpen drive didn't perform well, giving many errors especially by the end of the process and got a 57.4 score.

- Conclusion

Test Disc
Reading Speed
AOpen EHW-4048U
EAC CD-R
Max
81.2
ABEX TCD-721R
Max
51.2
ABEX TCD-726
Max
57.4
Average Score
63.26

The AOpen EHW-4048U got a less than medium overall score of 63.26.

- C2 Information accuracy

- Test Results (MAX Speed)

The C2 accuracy of the AOpen EHW-4048U is very low according to the CDSpeed. The drive got an 38.31% score. The quality is also very low due to high number of sync errors. The EAC analyzer software reported the following C2 %. The different results in C2% accuracy between the CDSpeed and EAC are due to different calculation method, but both tests indicate that the drive cannot be used safely for DAE when using C2 error information.

Test Disc
Reading Speed
AOpen CRW5224
Score
EAC CD-R
Max
66.9
ABEX TCD-721R
Max
51.6
ABEX TCD-726
Max
50.0
Average Score
67.0




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