Triple layer BD-R?

[dbminter]

I imported a large size of files into a Job in Build mode and I believe the target media listed in the lower right corner was BD-R/E TL.  I am guessing TL means Triple Layer?  Do they even make triple layer BD-R?  I know they make single layer, double layer, and quadruple layer, which I believe they refer to as XL, BD-R, but I'm not aware of any triple layer BD-R. 

[dbminter]

I did a little searching on Amazon.com.  Seems that the 100 GB BD-R are triple layer and that XL refers to triple layer media, not quadruple layer as I thought.  Apparently, there is no quadruple layer BD-R.    I just thought it would be since it's 100 GB and each layer is 25 GB.  So, it just made sense.  Shame on me for using logic!    After all, a double layer is 50 and so a triple layer should obviously be 100 GB! 

 

 

So, is each layer a 33.3 GB layer?  Or is it something like 2 single layers and 1 double layer? 

[dbminter]

Well, now this is just silly!  There is a quadruple layer BD-R but it's a freaking 128 GB!    None of that makes any sense! 

[ianymaty]

Here's some info about BD-R capacity http://www.hughsnews.ca/faqs/authoritative-blu-ray-disc-bd-faq/9-disc-capacity