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Writing Performance Part II - Packet Writing To CD-RW

Speedomania: 48x/16x/48x-Burner from LG
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We carry out a number of tests to check the writing performance in packet writing mode. First, we measure how long it takes to completely format a disk. Then we copy a 447 MB folder (using drag and drop) from the hard disk to the CD and back again. We clock both times using a stopwatch. The size of the files within the folder varies from one kiloByte to several megaBytes, which makes the exercise something of a real-world test. We then quickly erase the media with CloneCD and then copy the same folder in TAO mode using Nero. Finally, we erase the disk completely with CloneCD.

Each test is repeated at least twice to check the accuracy of the measured results. These are summarized in the table below.

HS-CD-RW Format 650 MB w InCD Copy 447 MB w InCD Read 447 MB w InCD Fast Erase w Clone CD Burn 447 MB w Nero Complete Erase w CloneCD
24x10x40x
Liteon LXR24101A
15:10 06:16 03:57 00:26 06:02 08:36
40x12x40x
Waitec Frisby II
11:16 05:13 02:13 00:24 05:01 07:12
44x24x44x
Yamaha CRW-F1UX
07:18 02:41 02:32 00:22 02:55 03:34
48x16x48x
LG GCE-8480B
11:57 05:15 02:34 00:27 05:04 07:13
40x12x40x
LG GCE-8400B
11:52 05:13 02:24 00:25 05:03 07:11

For the reasons already stated, we had to use 12x media here as well. The difference between both LG Electronics drives is less than the margin of error we apply to our measurements.

Writing Quality And Media Compatibility

Getting data onto a CD fast is one thing. No less important, however, is making sure that the data is written accurately. After all, you want to be sure you can play your CDs in any drive. Writing quality is therefore an extremely important factor.

We used six different writable and three different rewritable media in order to reach our verdict as to how dependent writing quality is on which CD is used.

We copied 717758 kBytes to a 700 MB CDR and 660152 kBytes to a 650 MB CD-RW. Writing method is DAO or TAO. We enabled the "Superlink" buffer under-run protection for each test. The GCE-84810B's "Fail-Free-Burning" feature selects the maximum write speed. In theory, this should produce the best possible results. After burning, we checked the surface of the CD for errors using the Scandisk function in Nero CD Speed (damaged or illegible sectors).

Tested Media
CDR
Size Certified Speed Write Speed Strategy Manuf. Good Sectors Damag- ed Sectors Un- readable Sectors Write Time
Octron 700 MB 24X 24X Short Ritek Co. 100,00% 0,00% 0,00% 04:00
Verbatim 700 MB 24X 32X Long Mitsubishi Chemicals Corp. 100,00% 0,10% 0,00% 05:07
Tevion 700 MB 32X 32X Short Ricoh Company Ltd. 100,00% 0,00% 0,00% 03:20
TDK 700 MB 40X 40X Short Ritek Co. 100,00% 0,00% 0,00% 03:11
48X 100,00% 0,00% 0,00% 03:06
Traxdata 700 MB 48X 32X Long Disc ID not allowed 100,00% 0,00% 0,00% 05:33
Traxdata 700 MB 40x 40X Short Ritek Co. 100% 0% 0% 03:12
48x 100% 0% 0% 02:55

All in all, the "Fail-Free-Burning" mechanism proved to be a very effective system. Although it did not allow all media to be burned at its maximum rated speed, it did produce flawless CDs.

Here is a summary of our tests using three different RW media.

Tested Media
CDRW
Size Certified Speed Write Speed Strategy Manuf. Good Sectors Damag- ed Sectors Un- readable Sectors Write Time
Fuji 650 MB 10X 12X Phase change Disc ID not allowed 100,00% 0,00% 0,00% 06:44
10X 100,00% 0,00% 0,00% 08:04
LiteOn 650 MB 12X 12x Phase change Disc ID not allowed 100,00% 0,00% 0,00% 06:50
10X 100,00% 0,00% 0,00% 08:12
Ricoh 650 MB 10x 12X Phase change Mitsubishi Chemicals Corp. 98,41% 1,59% 0,00% 06:44
10X 100,00% 0,00% 0,00% 08:04
GCE-8489B writing quality DAO mode

Apart from a small hiccup when run in conjunction with the Ricoh 10x RW media, the writing quality of the GCE-8480B is very good with RW media.

When the TAO write mode is selected, something very interesting happens:

Tested Media
CDRW
Size Certified Speed Write Speed Strategy Manuf. Good Sectors Damag- ed Sectors Un- readable Sectors Write Time
Fuji 650 MB 10X 12X Phase change Disc ID not allowed 99,89% 0,00% 0,11% 06:50
LiteOn 650 MB 12X 12x Phase change NAN-YA Plastics Corp. 99,89% 0,00% 0,11% 06:55
Ricoh 650 MB 10x 12x Phase change Disc ID not allowed 99,89% 0,00% 0,11% 06:51
GCE-8480B writing quality TAO mode

The last sectors of the TAO data CD-RW are unreadable. We found the same thing with data CD-Rs that were written in TAO mode.

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