ForumLG GSA-H50N detail information
| Posted by | agent009 |
| Posted on | 18/07/07 07:51 |
| Number of views | 30658 |
| Manufacturer | LG |
| Product | LG GSA-H50N |
| Description | 18x Super Multi DVD Rewriter |
DVD-RAM writing
LG GSA-H50N supports reading and writing the DVD-RAM format.
DVD-RAM is a veteran among the three DVD formats. It is a ten-year old format, and it predates the DVD-R format by one year.
The DVD-RAM format is inherently more reliable than other DVD rewritable formats due to its superior error control, defect management, and the option of hardware data verification during writing.
DVD-RAM defect management provides data structures, stored on each disc, that allow unusable sectors to be relocated. It also allows the number of relocated sectors to grow over time, effectively reversing the negative effect of gradual media deterioration.
Looking at the recording side of a DVD-RAM disc, it is easy to notice that the data surface is very different from DVD+R and DVD-R discs. It has a pattern of small rectangles not seen on any other recordable DVD media:
DVD-RAM recording surface
The rectangles are embossed (pre-recorded) areas that contain addressing information and other sector header data. The data portions of track sectors cover the remaining bulk of the surface.
A 4.7 GB DVD-RAM disc is divided into 34 zones, each comprising 1,888 tracks. The number of sectors increases from 25 sectors per track in the innermost zone 0 to 59 sectors per track in the outermost zone 33. This track layout explains the pattern we see on the recording side of a DVD-RAM disc.
In our setup, running on Windows Vista with no additional DVD-RAM softare installed, a DVD-RAM disc can be formatted in any of the following formats: FAT32, UDF 1.02, UDF 1.50, UDF 2.00, UDF 2.01, or UDF 2.50:
DVD-RAM format choices
Many operating systems (Mac OS X, Windows XP, Windows Vista) support DVD-RAM formatting, reading and writing directly, without the need to install additional drivers or software. Once a DVD-RAM disc is formatted, it acts like a removable hard drive and all writing is done in the background. This means that you do not have to wait for the drive to finish writing and can continue working with applications while the DVD-RAM drive is doing the burning.
In the tests below, we will explore DVD-RAM writing by LG GSA-H50N with media from two manufacturers.
Maxell 12x DVD-RAM
Maxell 12x DVD-RAM
(Thanks to ExtremeMhz for providing this media)
Disc information
Disc creation test
Transfer rate test
LG GSA-H50N writes a full 12x DVD-RAM disc in 5 minutes and 44 seconds.
Panasonic 5x DVD-RAM
Panasonic 5x DVD-RAM
Disc information
Disc creation test
A trouble free DVD-RAM experience with a 5x disc written at 3x-5x Z-CLV.
DVD+R DL and DVD-R DL 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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