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DVD Read Tests
As always, I test both single and dual layer
DVDs in these tests. 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
describe the difference without getting too technical...
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:
12.13x
Start:
6.72x
End:
16.24x |
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Seek
Times
Random:
97ms
1/3:
113ms
Full:
189ms |
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CPU Usage
1X: 9%
2X: 7%
4X: 12%
8X: 23% |
The results from our single layer DVD-Video
discs were almost identical to that of their previous models. The nice
thing about these drives is that there is no riplock on single layer discs
and the drive can easily reach speeds of 16x. In addition, seek times
and CPU usage with this media remains quite low.
2. CD-DVD Speed - Dual Layer PTP Disc
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Test
Results |
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Transfer
Speed
Average:
8.40x
Start:
5.10x
End:
10.36x |
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Seek
Times
Random:
100ms
1/3:
108ms
Full:
168ms |
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CPU Usage
1X: 8%
2X: 9%
4X: 16%
8X: 30% |
It was when moving to dual layer media that
this drive is world's apart. The new Samsung SH-S203N is the fastest
drive in their product line when it comes to these read tests. With
the rare PTP discs, it was able to achieve read speeds of just under 12x.
Also, seek times are CPU usage were extremely low in comparison.
3. CD-DVD Speed - Dual Layer OTP Disc
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Test
Results |
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Transfer
Speed
Average:
6.46x
Start:
3.56x
End:
8.49x |
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Seek
Times
Random:
113ms
1/3:
120ms
Full:
198ms |
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CPU Usage
1X: 5%
2X: 6%
4X: 12%
8X: N/A |
The same applies to the more common OTP
DVD-Video discs. Unlike all their previous models, the SH-S203N can
easily reach read speeds of 12x and the rest of the results also impressed
highly.
4. CD-DVD Speed - DVD-R, DVD-RW, DVD+R, DVD+RW
The final tests I like to conduct are with
re-writable DVD media and the results here were also quite unexpected.
Unlike other drives from Samsung, this one can easily read any recordable
or rewritable DVD disc at 12x. Mostly all drives struggle with
re-writable media. However, this drive handles every single format
with ease.
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