ForumLG GSA-H50N detail information
| Posted by | agent009 |
| Posted on | 18/07/07 07:51 |
| Number of views | 30114 |
| Manufacturer | LG |
| Product | LG GSA-H50N |
| Description | 18x Super Multi DVD Rewriter |
CD-R writing quality
In CD writing tests below, we will use Nero CD-DVD Speed to write CDs at the maximum speed supported by LG GSA-H50N.
We will then test their quality using a Sony CRX230EE CD-RW drive (a Sony-branded version of Lite-On SOHR-5239S). Quality scans will be conducted at the maximum scanning speed of 48x, our standard speed for Lite-On CD scanning. (Note that using different scanning drives and speeds may dramatically alter results obtained in quality tests.)
In CD quality tests, the testing drive reports two types of errors: C1 errors and C2 errors.
In practice, a pressed or recorded CD will always have some C1 errors, but they are easily corrected by the drive's error correcting decoder.
C2 errors are the next level of errors. While C2 errors can also be corrected by drive, they are not wanted in a good quality disc. A good disc should not contain any C2 errors, and have an average C1 error amount below 2.0 to be considered a best-quality disc, or at least below 10.0 to be considered a good-quality disc.
Beyond C2 errors, there are uncorrectable errors that make a disc unreadable.
In the tests below, we will explore CD-R writing speed and quality of LG GSA-H50N with media from several manufacturers.
Verbatim 52x CD-R
Verbatim 52x CD-R
Quality test
Excellent quality with this Verbatim media.
Fujifilm 48x CD-R
Fujifilm 48x CD-R
Quality test
An excellent burn with this Taiyo Yuden media.
Memorex 52x CD-R
Memorex 52x CD-R
(Thanks to Memorex USA for providing this media)
Quality test
Another excellent burn.
Memorex Black 48x CD-R
Memorex Black 48x CD-R
(Thanks to Memorex USA for providing this media)
Quality test
This media is black colored on both sides. While this would seem to be an impediment to optical storage, it is not. The disc's quality is good.
Memorex 40x Music CD-R
Memorex 40x Music CD-R
(Thanks to Memorex USA for providing this media)
Quality test
Impressive burn quality.
Office Depot 52x CD-R
Office Depot 52x CD-R
Quality test
A very good burn.
Summary
LG GSA-H50N is a very fast CD-R writer. It created high quality CD-R discs with all media types we tested.
CD-RW writing quality
In the tests below, we will explore CD-RW writing speed and quality of LG GSA-H50N with media from several manufacturers.
Verbatim DataLifePlus 32x CD-RW
Verbatim DataLifePlus 32x CD-RW
(Thanks to Verbatim USA for providing this media)
Quality test
Transfer rate test
The quality scan of this burn looks frightening but the disc is perfectly readable, a bit of a mystery.
To investigate further, we have performed two more quality scans with DVD drives: a BenQ DW1680 and a BenQ DW1640:
Quality test (BenQ DW1680)
Quality test (BenQ DW1640)
And two transfer rate tests with the same drives as above:
Transfer rate test (BenQ DW1680)
Transfer rate test (BenQ DW1640)
All scans point to a quality problem in the 24x area of the burn, but transfer rate tests do not confirm it. There is a discrepancy here that we cannot easily explain. It could be that the scanning drives are too sensitive or, more likely, every drive used above is a very good CD-RW reader.
Memorex 12x CD-RW
Memorex 12x CD-RW
(Thanks to Memorex USA for providing this media)
Quality test
A very good quality burn for a high-speed CD-RW.
Memorex 4x CD-RW
Memorex 4x CD-RW
(Thanks to Memorex USA for providing this media)
Quality test
An excellent quality burn.
Summary
LG GSA-H50N is a fast CD-RW writer, capable of excellent burns with the right media.
DVD reading performance
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!!!
add a tag
