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Old 11th August 2018
Prevet Prevet is offline
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Join Date: Oct 2017
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Default Burning BDXL M-Dic with OpenBSD

I'm about to try backing up some old files to BDXL M-Disc 100MB. I don't want to make $20 drink coasters, so I thought I say what I plan to do and see what OpenBSDers think:

From searching here I found the following advice which looks good.


Optical ISO creation: I use mkisofs from sysutils/cfrtools for CD9660
filesystems, and sysutils/udfclient for UDF filesystems.

Disc Burning: I follow the guidance in the FAQ, and use cdio(1) for CD
media, and growisofs from sysutils/dvd+rw-tools for all other optical media.

I also looked on the net and found a user saying growisofs didn't write 100GB disks correctly and he was told they would not fix it and I started to worry.

growisofs stops short of media maximum

Then I found this advice which seems to fit the above issue:

Reliable Burns with Links

Burning Blu-rays on Linux can be a pain, and often results in useless
"coasters" from failed burns.

The most reliable method is to create a UDF using k3b or Brasero (but only
create image, don't burn). Then you use CDRTools to burn, rather than
growisofs (which spits out a strange "error").

So I thought make the iso using udfclient as jggimi suggests, but then use cdrtools to write it to the BDXL. What do you think? Should I do that or trust growisofs?
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Old 11th August 2018
shep shep is offline
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Join Date: May 2008
Location: Dry and Dusty
Posts: 1,152

My understanding is that k3b/Brasero are front ends to cdrtools. My system will not utilize sysutils/dvd+rw-tools to back up files in one step. What works well for me is to generate an *.iso using mkisofs and then use the following from growisofs(1)

growisofs -dvd-compat -Z /dev/rcd0c=image.iso
You may need to adjust your character device per the same man page.

I have not used this w/ blueray but it worked with a Dual layer dvd.
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Old 11th August 2018
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jggimi jggimi is offline
More noise than signal
Join Date: May 2008
Location: USA
Posts: 6,292

It appears that the dvd+rw-tools developer did not have BD-RE hardware to recreate the reported problem with growisofs, and recommended xorriso as a possible solution. dvd+rw-tools is not actively developed, its last update was in 2008.

OpenBSD has a package of xorriso.

I know nothing about the software tool, but a quick browse of its features indicates it is for CD9660 file systems, it does not apparently support UDF.
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Old 12th August 2018
shep shep is offline
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sysutils/dvd+rw-tools upstream does have some info on BD-RE
It also mentions an -udf option
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