Re: [Cdrtools-support] [Cdrtools-developers] Fwd: An issue about cdrtools

[(Joerg S. <sc...@sc...>]

Hi,

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st xu <xu....@gm...> wrote:

> ---------- Forwarded message ---------
> ???????????? st xu <xu....@gm...>
> Date: 2021???3???19????????? ??????6:27
> Subject: An issue about cdrtools
> To: <joe...@fo...>
> 
> 
> Hi Schilling,
>   Sorry to bother you, I'm a noob with the cdrtools, and I've met an issue
> that I cannot append files to a *DVD-R* disc which was burned on Windows by
> Windows Explorer with the *CD/DVD mode.*
>   and here are my commands:
> // 1. get the start sector no.
> *cdrecord -msinfo -dev /dev/sr0*

Given that you do not send any information from cdrecord, I am wondering how I 
could help you.... in special since you do not use the cdrecord command line 
syntax that is explained in the cdrecord man page.

Using /dev/* arguments for the dev= option from cdrecord is explicitly called 
unsupported in the man page and typically causes cdrecord to fail on Linux as 
a result of the bugs in the Linux kernel or simply as from the fact that 
Linux implements more than one driver interface for a single device and /dev/*
typicalls enforces cdrecord to use the driver variant that does not work 
correctly. 

> // 2. make an iso with -C -M
> *mkisofs -J -udf -C 0,93952 -M /dev/sr0 -V mki_burn -v -o image.iso
> somefiles*
>   then an error occurred:
>     *mkisofs: unable to find previous session PVD '/dev/sr0'*
>   so i cannot accomplish my expectation.
> this is the result of cd_session command for this nonempty disc.
> [image: image.png]

This error message is not from mkisofs :-(

What software are you using?

In case of problems with multi session disks, it may be that the option 
argument for the -C option is wrong.

It helps to call "cdrecord -media-info -v" to retrieve the media information 
that I would need to be able to help.

>   and sometimes I will get a cdrecord error while appending files to an
> nonempty disc using the command: *cdrecord -multi -eject -v -dev /dev/sr0
> targetIsoFile*:

Again the unsupported dev= parameter :-(

> *    cdrecord: Data does not fit on current disk.*
>   I followed the codes and found that cdrecord cannot get the correct block
> size of disc, in file drv_dvd.c,
> [image: image.png]
>   after converting uchar to ulong, the nonzero value turned zero, so the
> next process will abort.

That message may appear when the medium is unable to hold the next session data 
or when you use a cdrecord variant that has been created (destroyed) by bad 
people that like to harm the cdrtoos project.

What version of cdrecord are you using?

What do you get from "cdrecord -version"?

>   I'm looking for something which could support appending files to a
> nonempty disc which was burned on windows before then I found your project,
> and the manpage said this project supports udf hybrid file system, I think
> it will be useful until i met the issue.

A disk written to before from windows may be in a bad state that prevants 
further data from being appended. What do you get from:

	cdrecord -media-info -v


>   Could you please give me some advice about how to solve these problems or
> how to append files to a nonempty disc which was burned on windows before?
> Or could you please let me know how to contact Schilling? Really need to
> solve this. I'll be very grateful.
>   Thank you anyway. Expect your reply.

As long as you do not send real information from cdrtools programs, I have no 
idea how I could help.



Jörg

-- 
EMail:jo...@sc...                  Jörg Schilling D-13353 Berlin
					Blog: http://schily.blogspot.com/
URL:  http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/