This is such an important topic, I included quotes from other members from the "Game Boy Advance games today" Thread. I also updated this OP with more information on the how a pressed disc and burned disc are created.
There are different points of view on if a burned disc shortens the life of a disc based console/movie disc player or if the burned disc has little affect. Feel free to post with your take on the burned discs.
Ziggy587 wrote:Some people say that the burned discs require more power to the laser to be read, so that will cause the drive to wear out faster. "Faster" is a relative term though. This might be more of a concern on some console versus others. Some people straight up call bullshit on this claim.ElkinFencer10 wrote:Burned discs put more strain on the laser and shorten their lifespan, do they not? Or is that just a Dreamcast issue?
It might be a crap shot either way. The drive on my Wii acts up with grinding noises, and that has nothing to do with burns or pressed discs. My point is that your drive can malfunction in many ways, so why be so concerned with just one?
This reference needs to be placed in any Burn Guide
Burned discs will make a laser work harder eventually shortening its life. How quickly is not clear, just imagine how the pits are formed on a commercial pressing vs a home disc burner. 3 to 5 billion pits average per disc. A lot of zeros and ones that all have to be copied from the master pressed disc with exact spacing.
1. The factory pressed disc will have industry quality closer tolerance placed pits vs a home burner unit.
2. The pit reflective properties of a pressed disc are superior to the dye of a burned disc.
CD AND DVD DISC DETAILS
BLURAY vs DVD vs CD PIT SIZES
Ziggy587 wrote:I'd like to know more about the technology of older drives versus newer drives. If you tell me a Sega CD or something of that era need to work harder, supply more power to the laser, etc, to read burns versus pressed discs, I wont disagree. But by the time the Dreamcast and PS2 came out, burning music CDs was a very popular thing to do. Optical disc based consoles make a thing out of "Look, you can play audio CD's too!" So you'd have to wonder if they took into account that people would be playing CD-Rs, and the drive technology can accommodate that.
Just look at dedicated audio CD players. Older CD players, ones that were made before CD burners were common place, can have a hard time reading CD-Rs. Some older units can't read burns at all. Even those that are in mint condition, it's the drive itself. Newer CD players can read CD-Rs no problem, in fact the manufactures expect you to use them. They often advertise the drive being able to play mp3 CDs, and a mixed CD-R became the new mixed tape.
My point is, I'm not sure how valid this argument is on newer drives. Of course, the Gamecube is kind of an oddity in that it used mini DVDs. The console doesn't even have a built in CD player. You can argue that Nintendo never intended the drive to read burned discs.
Sarge wrote:Yeah, I had one of the last revisions (9001, I think?), and it read pressed discs like a champ, but barfed on burned media. Particularly when it came to XA audio or FMVs. I know that they can typically be tweaked a bit to improve burned disc reading, but I suspect that's jacking up the laser power and thusly burning it up faster. It did so well with regular games that I didn't want to touch it, anyway.Ziggy587 wrote:Yeah, I'm not sure if the PS1 is a good example. On one hand, they touted it as a music CD player, but it was also before the time that CD-Rs were as common as the mixed tape. At least, in the early life of the console. The earliest revisions are also notorious for having bad drives, even the mid-life revisions aren't too great. And that's with pressed discs, let alone burns.Sarge wrote:I'm not entirely sure about this, but do consoles actually adjust the power of their laser reading mechanisms, or do they employ a constant energy consumption? If the intensity doesn't adjust (and I'm going to take a guess that they don't, given that most attempts to resuscitate drive revolve around potentiometer adjustments), the only thing that will cause issues is if you're having trouble reading the disc. Having to make multiple reads and use a lot of ECC just to work is going to cause the laser to break down more quickly, not unlike the constant strain that playing DVDs in a console will.
I use burned media on my Sega CD and Saturn, as those drives don't seem to be picky at all with what I use in it. My PlayStation, on the other hand, has always had issues with trying to read burned media, and I suspect continuing down that route would have led the system to meeting an early demise... not that they were spectacularly constructed in the first place.
Chris Woodford. wrote:CD and DVD players
http://www.explainthatstuff.com/cdplayers.html
What is a <Pressed> CD?
CDs are made from an original "master" disc. The master is "burned" with a laser beam that etches bumps (called pits) into its surface. A bump represents the number zero, so every time the laser burns a bump into the disc, a zero is stored there. The lack of a bump (which is a flat, unburned area on the disc, called a land) represents the number one. Thus, the laser can store all the information sampled from the original track of music by burning some areas (to represent zeros) and leaving other areas unburned (to represent ones). Although you can't see it, the disc holds this information in a tight, continuous spiral of about 3-5 billion pits. If you could unwrap the spiral and lay it in a straight line, it would stretch for about 6 km (roughly 3.5 miles)! Each pit occupies an area about two millionths of a millionth of a square meter. That's pretty tiny!
Once the master disc has been made, it is used to stamp out millions of plastic duplicates—the CDs that you buy and put into your music player or computer. Once each disc is pressed, it's coated with a thin aluminum layer (so it will reflect laser light), covered with protective polycarbonate and lacquer, and the label is printed on top.
Recordable CDs and DVDs
A CD-R writer has a higher-powered laser than normal, which generates heat when it strikes the disc, "burning" the dye and making a tiny black spot. Later, when a CD reader aims its laser at that spot, the light is completely absorbed and doesn't reflect back. This indicates that a zero ("0") is stored on the disc at that point. In places where the dye is unburned, the laser light reflects straight back again, indicating that a "1" is stored on the disc. See where this is going? By creating areas of "burned" dots, and other places where the dye is left alone, a CD-R writer creates a pattern of binary zeros and ones that can be used to store information. That, incidentally, is why CD-R writers are often called . Unfortunately, once the dye is "burned" it's permanently transformed: you can't change it back again. And that's why you can only write a CD-R disc once. Just in passing, we should note that, although CD writers are widely referred to as CD burners, they do not actually burn things (combust them with oxygen): they simply use a laser to change the light-sensitive dye.
Older game consoles will continually be harder to replace as years go by, a good idea to do whatever possible to prolong the life. I lean to the better quality control of a pressed disc over a home burned disc. So many pits that will not have that same tight spacing tolerance on a home burned disc compared to industry pressings. Throw in the reflective qualities of the burned disc dye vs the pressed disc.
Given a choice, always best to use a pressed disc over reading a CDR to save wear and tear of the laser eye on any game console. A CD-R burn of the microscopic pits in the dye will not be the same tight quality level of a pressed disc. In addition, some Dreamcast burned CD-Rs have music and video removed to fit the game data from the larger GD-ROM disc.
Dreamcast GD-ROM
Great info at the Sega 16 site which also mentions how on GD-ROM games the reader stops between reads saving on wear.
http://www.system16.com/hardware.php?id=723
The sound place holder of GD-ROM discs is on an inner track; opposite of most other game discs which have the data on the inner track. The different layout confirms how the GD-ROM reader accesses the data and music. Game data on the outer track and music in the middle track are also different compared to other formats.
http://segaretro.org/GD-ROM
The are 3 distinct regions when you look at the data (reflective) side of a GD-ROM disc.
► The low-density inner track (dark gray) is in the standard CD format, and contains about 35 MB (4 mins) of data. In most cases, this contains an audio track with a warning that the disc is for use on a Dreamcast, not an ordinary CD player. The CD section also contains a data segment, readable in PCs (though most discs only contain text files identifying the game, its copyright and bibliography). Some games, however, contain some bonus material for home computer users.
► The outer track (light gray) contains about 1 GB (112 mins) of data but is written in a high density format which cannot be accessed by normal CD-readers. This section contains the game data.
► The area between the two tracks (black) does not contain data and acts as a border. In this ring, the following text is stored. CDDA can also be stored here (with actual audio tracks such as Quake 3 uses) but the CDDA here cannot be read by a normal CD player (most games use ADX files for music though and save the rest of the disc space for more game data.)