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Hi,

> total number of bytes of the ISO file [...] divided by 2048
> Is that correct?

Yes. Ye olde way of doing arithmetics in shell.


$ stat -c '%s' ubuntu-18.04.3-desktop-amd64.iso...

Hi,

> by closed, you mean the xorriso-burned DVD can no longer be written to,
> correct?

Yes. A DVD+R can have three states: Blank, Appendable, Closed.
Blank means it is yet unused....

Hi,

> using the same xorriso-burned DVD from earlier


Drive type : vendor 'HL-DT-ST' product 'DVDRAM GT80N' revision '1.01'
Drive id : 'KZ5D9H24934 '
Media current: DVD+R
Media...

Hi,

about Ubuntu ISOs and its bootloaders.

It is of course possible and usual to install GRUB on your hard disk as
boot loader for being started by PC-BIOS firmware. It is also possible to...

Hi,

just to avoid the impression that i bailed out of this thread:
sudodus and i are discussing the mkusb/Debian issue in private mails now.

Have a nice day :)

Thomas

Hi,

yes, Debian can be quite a closed clam. But debian-cd and debian-live
should be interested in such a tool. I myself am upstream programmer and
"sponsored" uploader of my own software. So i...

Hi,

sudodus wrote:
> mkusb version 12 alias dus can extract directly from a gzip or xz
> compressed image file

Is there a reason known why this tool is not available as Debian
package ?...

Hi,

westie457 wrote:
> https://rufus.ie/

This is indeed a suitable tool to put any USB stick bootable GNU/Linux ISO
onto an USB stick. Use its "dd" mode in order to get the boot equipment...

Hi,

> which firmware are we talking about?

The mainboard firmware. In case of x86 processors the two candidates
are commonly known as BIOS and EFI. This firmware shall inspect the
attached...

Hi,

> I created a bootable USB stick with Ubuntu, but his desktop wouldn't
> boot,

Did you use a plain copy method (dd, cp, ...) ?
There are old howtos around which propose unpacking the ISO...

Hi,

> It's not even saying the "device or resource [is] busy,"

That would have been if the DVD was in some way readable and had been
mounted by some filesystem driver.

But when the drive...

Hi,

during the run with xorriso command "-toc", the drive believed to have no
medium at all.

Later, during the run with command "-as cdrecord" it recognized a DVD+R.
The re-assessment after...

Hi,

> Uhmm, just to be clear. If you reread my post, you'll notice that
> I used K3b, instead of Brasero.

Oops. Sorry.
...

Hi,

i fail to find the message text
"Found medium. No medium information. Please insert a suitable medium into drive."
in
https://sources.debian.org/src/brasero/3.12.2-6/
In the middle of...

Hi,

> Xfburn seems to do the trick and it's usable as an every day pgm

It's most obvious drawback is that cannot do multi-session.

Brasero can "import" a medium which was "left open" in a...

Hi,

> 2) Irrespective of the CD/DVD drive being used, Brasero when recording CDs
> on recent ubuntu distros (1804 and 1604 tested) writes a bad block at the
> end of the data. This doesn't...

Hi,

> Wow ! There's a fair bit to digest here and it's a bit late this evening.

You have reached the cellar level of support: libburn.


> However if Brasero has upset the drive perhaps I'll...

Hi,

> UNIX-SIGNAL: SIGINT errno= 2

I assume this was caused by you by e.g. pressing Ctrl+C.
(If not, then this was not the expected end of the run. We should
investigate.)


> I suppose...

Hi,

you could try whether it works better if a userland program is
in control of the SCSI transactions, rather than the cdrom driver
of Linux:


xorriso -read_speed max -outdev /dev/sr0...

Hi,

well, at least with Brasero and the libburn plugin, it is/was about a
wrong sequence of parameters for libburn call burn_drive_set_speed().
See my comment
...

Hi, if the medium is blank after a normally performed burn run then the problem is most likely a failure of the drive or the medium and not a failure of the burn software.


Is it surely the...

Hi,

Xfburn does no UDF, because libisofs does no UDF. K3b may use mkisofs or
genisoimage which can produce UDF for DVD video.

But i really would be astonished if MS-Windows 10 could not read...

Hi,

yes, "New Data Composition" would be the Xfburn task to use. It creates
an ISO 9660 filesystem which is supposed to be readable on about all
operating systems. (If some of its files have...

Hi,

maybe you worry in vain just because of a misleading message by Brasero.

I thoroughly blanked a DVD-RW to make it resemble a blank DVD-R.
(Done by xorriso. There i know what it does.)...

Hi,

the write speed is effecyively chosen by the drive. The burn program can
only tell what it would like to have.
One can ask the drive about the supported speeds. E.g. with a "16x" DVD-R
i...