ForumLG GSA-H50N detail information
| Posted by | agent009 |
| Posted on | 18/07/07 07:51 |
| Number of views | 30116 |
| Manufacturer | LG |
| Product | LG GSA-H50N |
| Description | 18x Super Multi DVD Rewriter |
DVD+R DL writing quality
In the tests below, we will explore DVD+R DL writing speed and quality of LG GSA-H50N with widely available media from two manufacturers.
Verbatim 2.4x DVD+R DL
Maxell 2.4x DVD+R DL
(Thanks to Maxell USA for providing this media)
Quality test
Transfer rate test
LG GSA-H50N offers only 4x speed for this 2.4x DVD+R DL media, no more, no less. The result is very good.
Verbatim 8x DVD+R DL
10x P-CAV writing
Verbatim 8x DVD+R DL
(Thanks to Verbatim USA for providing this media)
Quality test
Transfer rate test
There are unusually high and unusually distributed errors in the second layer of this burn but amazingly, the disc is readable at 5x-12x CAV in LG GSA-H42N. This paradox suggests a disconnect between reported quality and readability. We have little reason to doubt either: another quality scan with BenQ DW1640 shows a similar problem, but transfer rate tests with Pioneer DVR-112 and NEC ND-3540A confirm readability:
Quality test (BenQ DW1640)
Transfer rate test (Pioneer DVR-112)
Transfer rate test (NEC ND-3540A)
However, BenQ DW1640 refused to read the disc from the very beginning:
Transfer rate test (BenQ DW1640)
In cases like this, we usually burn another disc to determine if the result is reproducible. In this case, the next disc came out very similarly:
Quality test
Transfer rate test
We are not sure what to make of this. Quality scans with two different types of scanning drives agree that the discs are trouble, but both are readable in most drives.
8x Z-CLV writing
8x DVD+R DL burning takes five minutes longer but appears to lead to better results:
Quality test
Transfer rate test
Memorex 2.4x DVD+R DL
Memorex 2.4x DVD+R DL
(Thanks to Memorex USA for providing this media)
Quality test
Transfer rate test
A good burn, relatively speaking, of a common DVD+R DL media type.
Ridata 8x DVD+R DL
Ridata 8x DVD+R DL
(Thanks to Ritek USA | Advanced Media, Inc. for providing this media)
Quality test
Transfer rate test
An acceptable burn, with somewhat substandard quality throughout the second layer, but quite good when compared to other drives.
Summary
From our testing, LG GSA-H50N appears to be a good DVD+R DL writer, capable of excellent burns with Verbatim media and good with media from Ritek.
DVD-R DL writing quality
In the tests below, we will explore DVD-R DL writing speed and quality of LG GSA-H50N.
Ridata 4x DVD-R DL
Ridata 4x DVD-R DL
(Thanks to Ritek USA | Advanced Media, Inc. for providing this media)
Quality test
Transfer rate test
The quality scan above shows problems in the second layer which are serious enough to cause disruptions during the transfer rate test; a typical result with this media, maybe a bit better than we have seen with other drives.
Summary
LG GSA-H50N appears to perform acceptably with one type of DVD-R DL media we have available for testing.
DVD-R and DVD-RW writing quality
One thing I would advise against is using any LG drive for TRT. Those drives have no problems with extremely poor burns. I have had a severely degraded Ritek G05 that would not read at all in any of my liteons, I put it in my LG and it did not slow down once during the rip. I've noticed this on a number of poorly burnt discs in the past and I have two LG drives to confirm that they are very good readers, too good when it comes to TRT.
This message was edited at: 22-07-2007 08:05
Many things besides the quality of the disc can go wrong at high reading speeds. 16x DVD speeds mean interpreting 56 meters/180 feet per second of track covered with microscopic bumps. It makes me think of reading highway signs written in Braille - at supersonic speeds
The whole thing is a bit of a black art... a reading test can show a hint of a problem where the quality test sees none, and vice versa. The best we can do is to pick one reading drive for a review and stick with it until there is an apparent contradiction between a quality test and a reading test, as was the case here.
O meu dvd não abriu o computador e não roda nada!!!
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