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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: 8.25x
Start: 4.82x
End: 10.51x |
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Seek Times
Random: 133ms
1/3: 117ms
Full: 192ms |
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CPU Usage
1X: 7%
2X: 13%
4X: 25%
8X: 49% |
On our single layer discs, the Optorite
couldn't quite reach its 12x maximum read speed. I tried this numerous
times with different discs under 4.37GB and still experience that one spike
somewhere during the test (usually toward the end). The seek times and
CPU usage, however, were very low and comparable to that of the LG 12x
double layer writer.
2. CD-DVD Speed - Dual Layer PTP DVD
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Test Results |
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Transfer Speed
Average: 5.87x
Start: 3.54x
End: 7.25x |
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Seek Times
Random: 117ms
1/3: 115ms
Full: 170ms |
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CPU Usage
1X: 7%
2X: 13%
4X: 25%
8X: N/A |
The dual layer discs are usually where most
drives struggle. However, the Optorite DD1203 did very well in these
tests, hitting its maximum 8x read rate. Seek times and CPU usage
remained low, with the exception of the 8x tests which it failed.
3. CD-DVD Speed - Dual Layer OTP DVD
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Test Results |
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Transfer Speed
Average: 6.46x
Start: 3.54x
End: 8.50x |
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Seek Times
Random: 123ms
1/3: 120ms
Full: 194ms |
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CPU Usage
1X: 7%
2X: 13%
4X: 25%
8X: N/A |
Again, we see the drive having no problem
reaching 8x in our transfer tests. We also continue to see fairly low
seek times and CPU usage.
4. CD-DVD Speed - DVD-R, DVD-RW, DVD+R,
DVD+RW
The Optorite DD1203 is capable of reading
recordable media at a max rate of 12x. The drive did very well with
the exception of the re-writable discs.
Overall, this drive also did very well in our
DVD read tests. The only disappointments being the recognition times,
which we will touch on a bit later.
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