YAMAHA CRW-F1DX CDR-W - Page 9

RW Writing Tests

The F1 series support 24X writing with the use of Ultra HS-RW media. The drive can write at 10X, 16X and 24X with Ultra HS-RW. With 4X-10X HS-RW media, the supported rewriting speeds are 4X, 8X, 10X and 12X (CLV). The CRW-F1DX support 12X re-writing with 4-10X HS-RW only with few media.

With Ultra HS-RW media, the CRW-F1DX drive starts writing at 19.31X and reaches 24.15X at 10mins. The average theoretical re-writing speed is 23.83X:

Using Nero, we saw two different performances, either with OWSC enabled:

or with OWSC disabled:

As it seems, OWSC function does affect the re-writing speed of the drive. When it's enabled, will write almost to 20X (P-CAV) and when is disabled will write up to 24X (P-CAV). Below are the test results, by using either OWSC on/off:

24X writing (OWSC on): 4:16mins
24X writing (OWSC off): 3:46mins
16X writing (OWSC on): 5:30mins
16X writing (OWSC off): 6:02mins

- Packet Writing Tests

We used Ahead InCD v3.37 for the packet writing tests with the 24X Ultra HS-RW media. The formatted disc had 534 MB of free space. We copied a 403 MB file (403.147 kbs) from a Hard Disk (on the same PC as the writers) to the formatted RW media using Windows Explorer (we dragged and dropped) and we completed the test twice to eliminate any possible time measurement faults and user errors:

The external drive was slower in the writing part by 2X, and the reading performance was exactly the same as with the CRW-F1DX.