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Posted by Dennis
Posted on 13/10/03 12:39
Number of views 5755
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Re Write Tests
 

Besides supporting 4x DVD+R recording the AOpen drive can also write DVD+RW media at 4x. On this page of our review we'll see what these speeds mean when writing normal data compilations and when using the packet writing method.

Re-Writing Data:


For our CD-RW data re-writing tests we set up a new compilation of 650MB using the Nero Burning Rom 5.5 software. We used the DAO (Disc At Once) writing method. In the screenshot below you can see the burn process completed successfully:

As you can see our data compilation was written in 8 minutes and 14 seconds. This was about 7 seconds slower than the Sanyo CRD-BPDV2 drive. For our next DVD+RW test we set up a new DVD-ROM compilation of about 4.4GB. We again used the DAO writing method and started the write process:

The total compilation was written in just under 15 minutes. This recording time is about 9 to 10 minutes shorter than when recording at 2.4x (which is what most DVD+RW drives currently support). When we compare the AOpen write time to the Plextor PX-708A which also supports 4x DVD+RW recording, the AOpen again needs a bit more time, about 17 seconds, to complete the compilation.

Packet Writing:


For our packet writing tests we used Ahead's InCD 4 software and tested both the AOpen's CD-RW and DVD+RW performance. For our first test we set-up a test folder with random data measuring roughly 400MB in size. After formatting was complete we measured the time it took for the drive to write the test data. In the table below we've summed up our results:

CD-RW
Packet
Writing
InCD 4
Formatting
650MB
InCD 4
Copying
400MB
Average
Write
Speed
AOpen
DRW4410
8m:55s 10m:26s 5.11x

If you've read some of our previous reviews where we used the InCD 4 software you'll know that we have often seen strange results when looking at the recording times and speeds. The AOpen drive can re-write data at 10x but with InCD 4 we only achieved an average packet writing speed of 5.11x. So, to check if the InCD 4 software was the problem we simply uninstalled InCD 4 and replaced it with Ahead's InCD 3 software. In the table below you can see the new results:

CD-RW
Packet
Writing
InCD 3
Formatting
650MB
InCD 3
Copying
400MB
Average
Write
Speed
AOpen
DRW4410
12m:20s 6m:03s 7.53x

As you can see from the results the AOpen DRW4410 now achieved an average packet writing speed of 7.53x but strangely enough, the formatting of the CD-RW disc took (much) more time. Let's continue with the drive's DVD+RW packet writing performance. We've included the write times when using InCD 3 and 4:

DVD+RW
Packet
Writing
InCD
Formatting
4.4GB
InCD
Copying
4.4GB
Average
Write
Speed
AOpen
DRW4410
InCD 4
0m:39s 25m:47s 2.2x
AOpen
DRW4410
InCD 3
1m:10s 19m:28s 2.9x
Sanyo
CRD-BPDV2
InCD 3
1m:02s 25m:28s 2.2x

And again we can see quite a big difference when using InCD 3 or 4. When using InCD 4 the DVD+RW disc is formatted faster but writing to it takes more time. When using InCD 3 it's the other way around although an average packet writing speed of 2.9x when using InCD 3, is not very fast for a 4x DVD+RW drive. Because the AOpen drive does not support the Mount Rainier format this concludes our re-write tests.

Now that we've finished our normal tests, it's time for some advanced testing...
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Reactions on this item
Did you use a pressed or CD-R disc for your DAE tests? The reason I'm asking is because I've seen a number of slow down problems with pressed discs. Part way through the session, the speed drops off for no reason. This is the same problem Ricoh's first and second gen drives had.
Hi Ian,

I used a pressed CD for the DAE test (the advanced tests with Nero CD-DVD Speed were of course done with a CD-R disc). I always use the same discs for my reviews so because there were no problems I of course didn't do extra testing. I can check if there are read problems with other audio discs?
If you want. It didn't happen all the time either. Very sporadic. Some discs were worse than others too.
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