VirtualBox

Ticket #3242 (closed defect: fixed)

Opened 5 years ago

Last modified 2 years ago

DVD writing gives incorrect data

Reported by: bshannon Owned by:
Priority: critical Component: DVD
Version: VirtualBox 2.1.2 Keywords:
Cc: Guest type: Windows
Host type: Linux

Description (last modified by frank) (diff)

I'm using VirtualBox 2.1.2 on Ubuntu 8.04. The guest OS is Windows XP with guest additions installed.

I'm trying to create a video DVD using Nero under Windows. I've got the host DVD drive mounted with passthrough.

I created a video DVD using Nero 9. I wrote the files to a folder so I ended up with a VIDEO_TS folder and all the files in it.

I used Nero Burning ROM to write those files to a video DVD.

I then read the files back off the DVD and compared with the original files on disk. In one of the large video files, I see two bytes that read back as zeroes every 65536 bytes.

If I use K3B under the host Linux system to write the same original DVD video files to a blank disk, and then read those files back, they're identical to the originals. That convinces me that the DVD drive and general DVD writing is working - it's not a hardware or Linux problem.

Attachments

VBox.log Download (52.2 KB) - added by bshannon 5 years ago.

Change History

comment:1 Changed 5 years ago by frank

Any chance for a VBox.log file of the two different VM sessions (one for Nero9 writing the DVD, one for K3B writing the DVD)?

Changed 5 years ago by bshannon

comment:2 Changed 5 years ago by bshannon

I've attached the VBox.log file I found. I've done so many things with this virtual machine to try to narrow down the problem that I'm not 100% sure this is from the session where I last tried to write the disk, but I think it is. If that's not what it looks like to you, let me know and I'll do it all again and attach a new log file.

Note that there won't be a VBox.log file when using K3B because that's being done on the host OS, not under VirtualBox.

comment:3 Changed 5 years ago by frank

Ok, that log file doesn't show any fatal error. I think would could fix your problem only if we provide you a debug build which would do some more logging. Would you like to do some more tests?

comment:4 Changed 5 years ago by bshannon

Yes, I'd be happy to do some more tests with a debug version.

And if you have a simple test program that will run under Windows and write a video DVD and read it back to compare, that might be useful as well.

comment:5 Changed 5 years ago by frank

For Windows there is  Infrarecorder. I will be back to you with a special debug version.

comment:6 Changed 5 years ago by kookyman

Relates to and/or duplicates Tickets #903, #913, #983, #2641.

comment:7 Changed 5 years ago by frank

We found a problem but fixing still needs some time. It seems that ATAPI packets to the CD/DVD drive bigger than 65534 bytes are stripped.

comment:8 Changed 5 years ago by bshannon

Any news on this bug? This is the only thing keeping me from replacing my physical Windows machine with a virtual machine.

comment:9 Changed 5 years ago by frank

Sorry, still no fix in sight.

comment:10 Changed 4 years ago by Technologov

DVD writing doesn't deserve "blocker" status, it must be reduced to "major".

-Technologov

comment:11 Changed 4 years ago by sandervl73

  • Priority changed from blocker to critical

comment:12 Changed 4 years ago by bshannon

Any chance this will get attention anytime soon?

comment:13 Changed 2 years ago by frank

There was a fix for passthrough mode in VBox 4.1.6 but I'm not sure if this will finally fix your problem. Feedback would be appreciated.

comment:14 Changed 2 years ago by frank

  • Status changed from new to closed
  • Resolution set to fixed
  • Description modified (diff)

No response, closing.

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