Now, what about 32x rewritable CDs?

There are no changes whatsoever as to the burn process proper. The graphs and the speed are almost identical. The written disc was read without errors.

Applause repeated: they have solved this problem, too. The total of C1 errors is very small (443,358), considering the type of the medium, while C2 errors are missing altogether. The asymmetry is good, but the jitter rate is too high at the beginning of the disc. This didn’t prevent the resulting disc from being read by each of the ten optical drives we had tested earlier. So again we see a positive effect from the new firmware: the DW1620 now successfully burns 24x as well as not supported officially 32x CD-RW discs. So, we have no complains left about the DW1620’s quality of writing CD-RWs, especially 24x ones. It has no problems with this media format thanks to firmware B7T9.

Before going over to DVD discs let’s see if there are any changes in the error-correction algorithms. Of course, the firmware cannot correct the defects of the drive’s optical system, if there are any, but the ECC mechanism can really be improved upon.

We can’t see any changes here. The total read time and the number of the errors committed is the same. Well, the drive is anyway good in this test, so we have tried it again just of pure curiosity. But let’s deal with DVDs now.