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DVD Read Tests
As I do in all our DVD read tests, I will be testing both single layer and
dual layer DVD's. For the dual layer tests, we will look at both PTP and OTP
disks. For those who are unfamiliar with these methods, I will briefly try to
describe them each of them.
Dual layer discs are more than 4.38GB in size. There are two ways in which
they write these discs. One is PTP, which stands for parallel track path, and
the other is OTP which stands for opposite track path. In PTP discs, both
layers read from the inside of the disc to the outside while OTP discs read
from the inside to out and then back in for the inner layer. This allows the
drive to read both layers almost continuously, with only a short pause to
refocus the pickup lens. This is particularly useful for movies, where long
play time without interruption is required.
1. CD-DVD Speed - Single Layer DVD
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Test Results |
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Transfer Speed
Average:
3.91x
Start:
2.18x
End: 5.23x |
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Seek
Times
Random:
129ms
1/3: 158ms
Full:
320ms |
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CPU
Usage
1X: 5%
2X: 9%
4X: 15%
8X: N/A |
The results here were not good at all. The
transfer rates were super low, the lowest I've come across. Also, the
seek times were substantially high as well. Transfer speed started at
only 2x and maxed out at only 5.23x.
2. CD-DVD Speed - Dual Layer PTP DVD
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Test Results |
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Transfer Speed
Average:
3.59x
Start:
2.19x
End: 4.44x |
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Seek
Times
Random:
120ms
1/3: 137ms
Full:
261ms |
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CPU
Usage
1X: 5%
2X: 8%
4X: 14%
8X: N/A |
Again, we see very low transfer rates and high
seek times. Transfer speed maxed at only 4.44x.
3. CD-DVD Speed - Dual Layer OTP DVD
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Test Results |
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Transfer Speed
Average:
3.95x
Start:
2.18x
End: 5.20x |
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Seek
Times
Random:
136ms
1/3: 162ms
Full:
307ms |
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CPU
Usage
1X: 4%
2X: 7%
4X: N/A
8X: N/A |
This drive certainly does not handle DVD-Video
discs very well at all. Transfer speed seems to start at only 2x and max
out at only 5x. Seek time were also not too impressive, however, the CPU
Usage rates were low.
4. CD-DVD Speed - DVD-R, DVD-RW, DVD+R,
DVD+RW
Now, the read performance on recordable media
were a completely different story. The transfer rates were quite high,
especially when compared to some of the other drives we have looked at.
Notice I have included DVD-RAM into the mix. That is because the Pioneer
DVR-108 is capable of reading DVD-RAM discs at 2x.
Based on these results, it appears that this
drive just has difficulty reading DVD-Video discs. I'm not sure why the
scores were so low, but it was a bit of a disappointment indeed. We will
see how it actually affects ripping performance a bit later on.
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