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Mitsumi CR-485FTE CD-RW

Jun 22,2003 0

9. Rewriting Tests

 

Review Pages

1. Introduction
2. Error Correction Tests
3. Data CD Reading Tests
4. Protected Data Disc Tests
5. DAE Tests
6. Recording Tests
7. Writing Quality Tests - Page 1
8. Writing Quality Tests - Page 2
9. Rewriting Tests
10. Conclusion

 

Mitsumi CR-485FTE - Page 9

RW Writing Tests

The drive supports the 10x CLV recording method when using HS-RW media and is able to rewrite at 24x P-CAV and 32x US-RW speeds. We used new 32x US-RW media by Mitsubishi Chemicals. Unfortunately the drive could not recognize them and we used for writing 24x US-RW media. With these particular discs, a user can record at 12x and 24x.

As you can see from the CDSpeed writing simulation graph, Mitsumi CR-48XFTE started writing at 19.15x and reached the 24x by the 12min address of the disc, keeping it fixed until the end of the writing process. The average writing speed is 23.79x.

For the recording tests, we burned a full 74mins disc with all the drives. The results are showed in the following chart. We used the maximum supported speed for each drive.

Mitsumi CR-48XFTE finished the task in 3:41min (24x). The Plextor drive gave the same writing time while the Optorite CW5201 was faster due to the 32x rewriting speed. The Mitsumi drive needed 23sec to perform a "quick erase" task.

Below you can see a screenshot from Nero Burning Rom after a successful writing at 24x.

- Packet Writing Tests

We used Ahead InCD for the packet writing tests. The formatted disc had 534 MB of free space. We copied a 403 MB file (403.147 KB) from a Hard Disk (on the same PC as the writers) to the formatted RW media using Windows Explorer (we dragged and dropped). The following charts illustrated the results with 24x US-RW media.

In the following table there are the packet writing results using US-RW media

Drive
Mitsumi CR-48XFTE
24x
10x
Write
20.2X
7.95X
Read
20.51x
15.27X
- Mt. Rainier Tests

For testing the Mt. Rainier performance we used InCD UDF writing /reading software by Ahead Software. After the format process, we immediately started the recording process (drag & drop). The opposite process gave us the reading speed.

Drive
Average Writing Speed (X)
Average Reading Speed (X)
Mitsumi CR-48XFTE
24X US-RW
5.42X
15.53X
HS-RW
2.68X
15.44X

While the background formatting process was in progress, the drive recorded the file to the 24x CD-RW at only 5.42x. At the same time, the reading speed was 15.53x. The same slow writing speed was also noticed when using the 10x CD-RW disc, while reading was again faster.

 

Review Pages

1. Introduction
2. Error Correction Tests
3. Data CD Reading Tests
4. Protected Data Disc Tests
5. DAE Tests
6. Recording Tests
7. Writing Quality Tests - Page 1
8. Writing Quality Tests - Page 2
9. Rewriting Tests
10. Conclusion

 

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