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Well, you said one side was a CD according to ImgBurn and that the other side was 33.3 GB in size as returned by ImgBurn. Only BD-R 33.3 GB layers or BD-R DL/TL/XL could return a size of 33.3 GB IF ImgBurn is returning correct values. Since you're able to get some kind of format data from both sides, it's a flipper.

How do you know it is a CD and BD flipper?

I can't attest to their CD-R quality as I've never used it to my memory, but I have personal experience with their DVD-R, which is junk. Unreadable after less than a year.

Yes, but my point was you don't have a label side. So, I'm wondering if it's not a PRR-C74 because that supposedly has only 1 data side and a branded label on the other side. Plus, I find it difficult to fathom anyone, especially Princo, a bottom of the barrel manufacturer, would make a CD flipper with a CD-R layer on one side and a 33.3 GB BD-R layer on the other. I've never heard of anyone, let alone Princo, making a CD-R with a BD-R layer on the other side.

Also I read that Princo is a low quality brand. Is it good that my CD still works from 1998?

It doesnt read properly

Nothing I could find, which was very little, indicates the PRR-C74 is a flipper. The PRR-C74 has this label surface on it: http://www.ksky.ne.jp/~conflict/imagecdrn/princo_l.jpg But, you say you have two data "readable" layers? That indicates it's a flipper.

I think its just a weird CD-R disc. Pretty sure this is the case from it.

Hi there, as it says above, I have been successful many times in the past, but each time I have this task to do I seem to have to go thru a 'hit or/and miss' process everytime, usually it complains about the available size being insufficient. Often I have to restore all defaults several times, and /or open and close the app several times, eventually the the app will accept the .mkv file and it will burn. Is there a definitive procedure that will work everytime? A related question: what is the usable free space on a BD50 when burning data directly?, & Is the size calculator within Imgburn accurate for direct data burning extimations? cheers CD

Hello I found the CD player with wayback machine and it seems to be from about 2005 https://web.archive.org/web/20060319003652/http://www.denver-electronics.com/pages/webside2.asp?articleGuid=7812&menuGuid=5387&subMenuguid=5391

Rewritable media have a different reflectivity on the data surface than WORM media. So, it's not unheard of for a CD-R to be readable but not a CD-RW. For instance, my 1997 Playstation would play Audio CD's burned to CD-R's from TDK and Verbatim, but would not read any CD-RW's I threw at it around 2005.

Hello I am trying to play an Audio CD-RW and I burned the exact same way to a CD-R and it would read it. Sorry I don't remember and I can't find any good information about it on the internet at all.

Well, I hate to come across as pedantic but it's not a data track the CD player looks for. Data tracks only apply to CD's on PC's. Audio CD is its very own unique beast that a standalone CD player reads. Now, that does actually beg a question. Is this CD-RW you're attempting to play on the standalone CD player an Audio CD disc or a Mixed Mode disc with audio tracks and a data track or tracks on it? If it's Mixed Mode, the CD player may not read it because it can't differentiate between the tracks. If it is Mixed Mode, try writing an Audio CD to the CD-RW and see if your standalone CD player will play the CD-RW as an Audio CD. Also, do you happen to know how old your standalone CD player is?

The CD player says CD-R/RW. I tried using my Verbatim 8-12x CD-RW and 16-24x CD-RW. With both the drive just doesnt find the data track and no disc.

Could be a few things. Though I generally don't trust anything AI says or does, ChatGPT's initial overview could be correct. The CD-RW may be newer enough over your older CD player that the player's laser can't read through the reflective laser. It's also possible the CD player doesn't support playback of CD-RW at all. CD-RW is not something generally universally supported even on modern players. It's also possible that CD player may support CD-RW but just doesn't like that particular brand/manufacturer of CD-RW.

I can reproduce this 34GB reading again.

Hello my CD player does not read a CD-RW. I don't know what the issue is its old but it says it should read CD-RW. ChatGPT told me it can be because my CD-RW can be read only at a higher speed which this old player can't do is that true?

You can use whichever dlls work for you. look at the log window when the verify operation begins. It should tell you the read speed the drive is meant to be using. if it decides to slow it down for some reason, it’s probably related to the readability of the disc.

Makes no sense for them to migrate to 33.3GB single layer BD-R discs at this point. We're at the beginning of the end for the Blu-Ray era. Soon enough we'll have a big jump in the technological advancement of readers/writers and we'll be provided with denser storage media which might be or not similar to the current technology of the Blu-Ray since it's technology didn't reach it's limits yet and can be pushed to multiple Petabytes/layer theoretically according to it's inventor. He succesfully made a CD-ROM of 120mm size and 1.2mm thickness which could hold 1.000.000GB of theoretical data and named it "Hyper CD-ROM". Sony then used the optical system technology involved and adapted it on the "Blu-Ray" system to fit comercial purposes. They can simply repeat the process, but with today's technological advancement taken in account 😶

I had wondered why BD-R SL's didn't migrate to using 33.3 GB layers, since they did exist in BD-R TL discs.

BD-R XL (triple layered) discs are said to store "100GB" on cover (which means 100 Gigabytes), according to ImgBurn they hold 100,103,356,416 Bytes (not bits, to be kept in mind). Since those discs hold 3 layers, it would result to exactly 33,367,785,472 Bytes / layer which means 33.367785472 Gigabytes (the amount left after those 33.3GB matter a lot). This proves that they actually store as much as they say @dbminter. The confusion comes when you want to burn them. Always keep in mind that your file system will take up from whatever storage size is on the cover upon formating the media. For example one BD-R XL (triple layered) disc can only hold around 90.2GB of "real" data. What I talked about above is merely "theoretical" data. Very weird though considering BD-R (single layered) discs, which hold "25GB" on cover, (means 25 Gigabytes) can store only 25,025,314,816 bytes. That would make it a 25.025GB disc, or around 23.2GB after file system formating. One would expect single layer discs to contain a "full" layer of 33.367785472GB like other Blu-Ray discs types do, but the lithography level went lower along with the technological advancement of Blu-Ray writers/readers available to consumers so this why we don't have 33.3GB BD-R (single layer) discs. 😅 According to this information @Tobim6, the media you're seeing is of 34,359,738,368 Bytes which would mean 34.359738368 Gigabytes of theoretical storage and around 23.3GB of storage after file system formating. Also, calculating the numbers of Bytes/Sector, it would be 2048 Bytes/Sector for that media like on any Blu-Ray disc known. The key difference would be the Channel Bit Lenght that will DEFINITELY be even smaller than normal on today's usual Blu-Ray discs. BD-R (single layer) discs along with the BD-R DL (dual layer) discs have a Channel Bit Lenght of 74.50 nm (Nanometers), and BD-R XL (triple layer) discs have a Channel Bit Lenght of 55.87 nm (Nanometers). As you can see, the lithography level of the disc goes lower and lower the more storage one layer can hold. This would mean that your disc has a layer with an even smaller level of lithography than 55.87 nm, making this layer different from what a Blu-Ray is known to be. The main reason for your reader to not being able to properly make use of the storage media should be the Channel Bit Lenght. The firmware simply didn't include the feature to read with that precision (hardware-wise, you CAN read data with higher precision than 55.87 nm, but this value was chosen by engineers because it's the most error-free). Now, the math involved to calculate what's your Channel Bit Lenght there is a bit hard, I could do it though if needed (still I won't guarantee that it's a very precise result).

The good news that's not "sparking" but I figured you probably were aware of that. That sounds more like the laser having difficulty switching between the layers. Actually, another possibility is it's not a BD-R/RE DL layer on the other side. It could be one of those single layer 33.3 GB BD layers. Triple layer BD's use layers that are 33.3 GB each. (So, yes, technically 100 GB TL discs are not 100 GB but 99.9 GB.)

34 GB is a double layer Blu-Ray or HD DVD. The fact that Windows asks if you want to format it as a giant floppy (Packet writing.) indicates it's a BD-R DL or BD-RE DL layer. A BD drive wouldn't be able to read anything from an HD DVD layer. However, it is practically unheard of to create CD-R flippers with a CD-R on one side and a BD-R/RE DL on the other.

https://voca.ro/1jzTcXTnZ6aS https://voca.ro/11tR9HeeAqoV

If you've got a CD with a branded surface, like those CD-RW's in your other post, you could try putting one of those in your drive with the label side down and see how ImgBurn behaves. See what it returns. See if it returns a Logical Unit Not Ready - Cause Not Reportable error. (I've never seen that 2nd part before.)