Can i write more than 45,1GB on a 50GB BD-R ?

[Phantomas]

I search this matter a long time but until now I don't have any clear answer.

So it's known a 50GB BD-R on Windows has clear size 45,1GB.It's possible to write a BD-R bigger than this size (45,1GB) ? Or it will be a waste recording ?

[Naiera]

If you can write more than 45GB to a BD50, you risk compatibility issues with certain drives and players. That’s why you almost never see a “real” Blu-ray with more than 43-44 gigs on it.

DVD9s only hold 8.5GB and you never saw them with more than 7.5 gigs on them either.

[HDTV1080P]

For professional factory stamped Blu-ray's by studios like 20th Century Fox, I have seen dual layer discs with around 48GB of space used out of 50GB. Man on Fire uses 46.6GB of space.

[Jar Jar Stinks]

Originally Posted by Naiera

If you can write more than 45GB to a BD50, you risk compatibility issues with certain drives and players. That’s why you almost never see a “real” Blu-ray with more than 43-44 gigs on it.

DVD9s only hold 8.5GB and you never saw them with more than 7.5 gigs on them either.

Not sure if that's true. The Speed Racer Complete Collection Discs are like 49.5 gb.

Originally Posted by svenge

Disc Title: MACH GO GO GO D1
Disc Size: 49,851,137,438 bytes
Protection: AACS
BD-Java: Yes
Playlist: 00827.MPLS
Size: 49,384,144,896 bytes
Length: 5:08:34.287
Total Bitrate: 21.34 Mbps
Video: MPEG-4 AVC Video / 18352 kbps / 1080p / 23.976 fps / 16:9 / High Profile 4.1
Audio: Japanese / Dolby TrueHD Audio / 2.0 / 48 kHz / 399 kbps / 16-bit (AC3 Embedded: 2.0 / 48 kHz / 192 kbps)
Subtitle: English / 29.949 kbps

Disc Title: MACH GO GO GO D2
Disc Size: 49,796,083,104 bytes
Protection: AACS
BD-Java: Yes
Playlist: 00827.MPLS
Size: 49,177,180,416 bytes
Length: 5:08:14.225
Total Bitrate: 21.27 Mbps
Video: MPEG-4 AVC Video / 18294 kbps / 1080p / 23.976 fps / 16:9 / High Profile 4.1
Audio: Japanese / Dolby TrueHD Audio / 2.0 / 48 kHz / 404 kbps / 16-bit (AC3 Embedded: 2.0 / 48 kHz / 192 kbps)
Subtitle: English / 25.901 kbps

Disc Title: MACH GO GO GO D3
Disc Size: 49,768,926,151 bytes
Protection: AACS
BD-Java: Yes
Playlist: 00827.MPLS
Size: 49,398,773,760 bytes
Length: 5:08:34.495
Total Bitrate: 21.34 Mbps
Video: MPEG-4 AVC Video / 18358 kbps / 1080p / 23.976 fps / 16:9 / High Profile 4.1
Audio: Japanese / Dolby TrueHD Audio / 2.0 / 48 kHz / 405 kbps / 16-bit (AC3 Embedded: 2.0 / 48 kHz / 192 kbps)
Subtitle: English / 27.821 kbps
Subtitle: English / 2.056 kbps

Disc Title: MACH GO GO GO D4
Disc Size: 49,934,997,963 bytes
Protection: AACS
BD-Java: Yes
Playlist: 00827.MPLS
Size: 49,391,597,568 bytes
Length: 5:08:34.495
Total Bitrate: 21.34 Mbps
Video: MPEG-4 AVC Video / 18355 kbps / 1080p / 23.976 fps / 16:9 / High Profile 4.1
Audio: Japanese / Dolby TrueHD Audio / 2.0 / 48 kHz / 402 kbps / 16-bit (AC3 Embedded: 2.0 / 48 kHz / 192 kbps)
Subtitle: English / 30.000 kbps

Disc Title: MACH GO GO GO D5
Disc Size: 16,926,380,906 bytes
Protection: AACS
BD-Java: Yes
Playlist: 00827.MPLS
Size: 16,317,155,328 bytes
Length: 1:41:58.111
Total Bitrate: 21.34 Mbps
Video: MPEG-4 AVC Video / 18350 kbps / 1080p / 23.976 fps / 16:9 / High Profile 4.1
Audio: Japanese / Dolby TrueHD Audio / 2.0 / 48 kHz / 400 kbps / 16-bit (AC3 Embedded: 2.0 / 48 kHz / 192 kbps)
Subtitle: English / 24.936 kbps
Subtitle: English / 7.015 kbps

[Naiera]

Originally Posted by Jar Jar Stinks

Not sure if that's true. The Speed Racer Complete Collection Discs are like 49.5 gb.

Hence "almost never". It is a fact that there's something considered a "safe zone", and on a BD50, that's within 45 gigs.

[Jar Jar Stinks]

Originally Posted by Naiera

Hence "almost never". It is a fact that there's something considered a "safe zone", and on a BD50, that's within 45 gigs.

Are you speculating based on anecdotal observation, or is there data to back up your claim?

[Naiera]

It's a fact that there's a safe zone and that it's better to not go beyond it. I've also had quite a lot of discs (mainly anime ones) in my Blu-ray drive over the years, and I don't recall seeing one go past 45 gigs. I'm not saying it doesn't happen, but you risk compatibility issues if you do.

[Vilya]

I use a couple of different programs for burning bd-r discs and both programs limit what I can actually burn to slightly less than what the disc claims. On a 25 gb single layer disc, I can only use approx. 23.3 gb as labelled by Windows and the burning ROMs that I use.

See this chart:

BD-R Single layer 25GB (23.3GiB)
BD-R Dual layer 50GB (46.6GiB)
BD-RE Single layer REwriteable 25 GB (23.3GiB)
BD-RE Dual layer REwriteable 50GB (46.6GiB)
BD-XL Triple layer 100GB (93.1GiB)
BD-XL Quadruple layer 128GB (119.2GiB)

"GiB = GigaBytes in computer world where 1 kilobyte = 1024 bytes"

https://www.videohelp.com/hd

One person explained the discrepancy this way:

"Media manufacturers rate the capacity in GB (1000 * 1000 * 1000). Windows [and all operating systems] reports file sizes in GiB (1024 * 1024 * 1024), though they don't use the GiB nomenclature. So when Windows shows a file is 25 GB the file is actually 26,843,545,600 (25 * 1024 * 1024 * 1024) bytes, 26.8 GB by the disc manufacture's way of counting."

Using that formula in reverse, the Mach Go Go disc 1 example referenced in post #4 equates to 46 GB as the disc manufacturer would reckon it.

49,384,144,896 bytes/ 1024/1024/1024= 46 GB

or in an equivalent expression:

49,384,144,896 bytes/ 1,073,741,824= 46 GB

https://www.google.com/search?q=gib+...w=1600&bih=805

GiB vs. GB:

"GB (Gigabyte) and GiB (Gibibyte) are two different digital data storage scales defined by the International Electrotechnical Commission (IEC).

In short - GiB is base 2, GB is base 10.

GiB = 2 to the 30th power (1,073,741,824) bytes (base 2)
GB = 10 to the 9th power (1,000,000,000) bytes (base 10)"

https://support.red.com/hc/en-us/art...een-GB-and-GiB

[Phantomas]

Thanks all for your answers.

The Bluray Valkyrie for example it's 46,4GB. So it's safe to create a backup with Nero ?

[Vilya]

Originally Posted by Phantomas

Thanks all for your answers.

The Bluray Valkyrie for example it's 46,4GB. So it's safe to create a backup with Nero ?

A 50gb dual layer blu-ray disc has 46.6 GiB of actual space and as computer operating systems and burning ROMs label GiB and GB interchangeably, when they are in fact different, you should have .2 GiB to spare with a 1:1 replication. Nero is displaying the size in GiB like all computer programs do. I use an older version of Nero myself.

46.4 GiB equals 49.82 GB, so you should be fine.

46.6 GiB equals 50 GB, the stated capacity of a dual layer bd-r, as per the chart and the conversion calculator given previously.

As an approximate guideline, when a computer program gives you a file size it is in GiB despite being labelled as GB. Computers use base 2. Take the stated file size and multiply it by 1.074 to convert it to actual GB which is how blank bd-r disc media is measured (base 10).

1 gibibyte (GiB) = 1.07374 gigabyte (GB)