#21 Blu-ray support ?

[rico]

Is there any blu-ray support comming in the near future, The ussage scenario would be for longtime backup of files on media like 100gb xl m-disc? as of now it is limited to small dvd/m-disc

This software is truely awsome, and it would be a killer feature to have since m-disc is kind of the only way to take offline backup that can last 100+ years

[Roger]

For blu-ray writing, you can simply use growisofs.

$ growisofs -dvd-compat -Z /dev/sr0 -dvd-video /some_folder/

"-dvd-compat" permanently closes the disk/session.

"-Z" is the device file

All other options are mkisofs options.

-V "LABEL" is for the media label.

See:
$ man growisofs

For integrating bluray support into cdw, likely only requires copying the current cdw DVD functions which already use growisofs routines. CDW also would need changes to recognize the bluray media and the bluray sizes.

Personally, I find using growisofs much easier to write DVD/BluRay media, and reserve CDW for writing CD-R media. Albeit, sometimes I do use CDW for writing DVD media.

I also have a growisofs incantation (using mkisofs options) for writing longer than 12(?) byte filenames, but cannot access my cmds.txt currently for providing the information here. So hopefully you're not planning to write files with filenames longer than the standard 12(?) bytes, else you'll need to search the Internet forums and researching the mkisofs documentation.

[acerion]

On 10.05.2017 07:31, Roger wrote:

For integrating bluray support into cdw, likely only requires copying
the current cdw DVD functions which already use growisofs routines. CDW
also would need changes to recognize the bluray media and the bluray sizes.

If I ever decide to add full support for data blu-ray, the plan would be
following:
1. finally buy a blu-ray burner,
2. make sure that cdw internally uses data types (integers) large enough
to make support of large files possible. This is important e.g. when
calculating size of selected files, or when reading data from burned
disc for verification purposes.
3. implement recognition of disc type and state, possibly by growisofs
and cdrecord and xorriso (thrice as much fun as you would think).
4. make sure that verification of large discs really works,
5. make sure that various indicators in UI support large values (I never
tested a progress indicator window to display "100 GB" strings),
6. test.

The last point scares me off. I remember than when I was implementing
support for DVDs, I've spent many, many hours doing "create
image/burn/verify with checksum/verify in file manager/fix problems"
cycles. Of course DVDs are bad because there are more types of DVDs, but
blu-rays are larger, so they may be even worse.

Best regards,
Kamil

[acerion]

I've been asked similar question in the past, and the short answer is
"probably not".

cdw is no longer a high priority project for me. I'm willing to fix
bugs, and perhaps add a small feature, but blu-ray support is not a
small feature to implement and to test.

cdw may still help you with burning data to blu-ray (I didn't test this,
so I may be wrong). If I remember correctly, cdw can create stand-alone
ISO or UDF images that are larger than 4.7 GB. If you successfully
create 100 GB ISO/UDF image with cdw+mkisofs/udftools (and I'm not
positive that you can), you can then use directly some command line tool
(growisofs/cdrecord) to burn the image to blu-ray.

Granted, this won't let you to easily verify burned image, but at least
you will get the benefit of having a file selector in cdw to easily
selected files for your ISO/UDF image file.

I will keep this ticket open. Perhaps, one day, I will change my mind
and do something about blu-ray support.

Best regards,
Kamil

On 10.05.2017 00:12, rico wrote:

---

*[bugs:#21] https://sourceforge.net/p/cdw/bugs/21/ Blu-ray support ? *

Status: open
Group: v1.0_(example)
Labels: Blu-Ray
Created: Tue May 09, 2017 10:12 PM UTC by rico
Last Updated: Tue May 09, 2017 10:12 PM UTC
Owner: nobody

Is there any blu-ray support comming in the near future, The ussage
scenario would be for longtime backup of files on media like 100gb xl
m-disc? as of now it is limited to small dvd/m-disc

This software is truely awsome, and it would be a killer feature to have
since m-disc is kind of the only way to take offline backup that can
last 100+ years

---

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[rico]

Thanks for the verry quick and clear answers, i will use growisofs, and will be looking forward to that day if it "comes". maybe a donating page for the feature could help fund the endeavor ? could be that others where interested.

[acerion]

On 10.05.2017 23:03, rico wrote:

maybe a donating page
for the feature could help fund the endeavor ? could be that others
where interested.

I recognize donations as a valuable solution for many Free Software
communities, but I never considered accepting donations for any of my
projects. I feel that this would change my attitude towards a project
and work/focus/dedication that I put into the project, and I wouldn't
feel good with this change.

Thanks for the suggestion, though :)

Best regards,
Kamil