﻿ticket	summary	version	created	modified	_changetime	_description	_reporter
19648	VirtualBox mounts the same ISO in multiple virtual CD/DVD drives.	VirtualBox 6.1.10	2020-06-09T10:16:39Z	2020-06-10T08:11:54Z	2020-06-10T08:11:54Z	"Related discussion topic, with logs. https://forums.virtualbox.org/viewtopic.php?f=8&t=98545

We've actually been seeing this error for years, but I can't find a ticket for it.

Users sometimes get confused and add a new CD/DVD drive to the VM recipe, instead of adding media to a drive.

If they do that while the GAs ISO is mounted in CD drive #1, then I believe that the next time they choose ""Insert Guest Additions CD"" in a running VM, VirtualBox sees the empty drive and inserts a second copy of the GAs ISO in drive #2, not noticing that drive #1 still holds a copy. That leaves you with the same media mounted in two CD drives, which obviously could never happen in the physical world. VirtualBox gets more confused from there, and users sometimes compound the problem by having this invalid state recorded in past snapshots. Once this happens the only known workaround is to manually edit the .vbox file.

Obviously, it should never be possible to mount the same media in more than one CD/DVD drive. I can think of a multitude of trivially easy ways to stop that happening, so I'm sure you will too.

Logs can be found in the linked discussion topic."	mpack
17974	Unable to burn Audio CD	VirtualBox 5.2.18	2018-09-09T15:04:04Z	2018-09-09T15:04:04Z	2018-09-09T15:04:04Z	"Hello,

I am running Ubuntu Linux 18.04 LTS with all the latest patches installed.

Linux xxxxxxx 4.15.0-33-generic #36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

I installed Virtualbox/Extension Pack/Guest Additions from virtualbox.org; version 5.2.18 r124319 (Qt5 9.5)

My machine has a DVD/RW drive that is connected to the Windows 7 guest via Passthrough.

I am able to burn data discs, but cannot burn audio discs. I checked the Virtualbo releases, and as of version 4.2 the changelog says that audio cd burning is supported.

How can I get this working correctly?

I have attached a log file from right after burning an audio cd fails.

I purchased a Virtualbox Enterprise license on CDW so that this ticket may receive priority attention since I am a paying customer. Please feel free to call me via the information on my account if you need any confirmation of the CDW purchase.

Thank you in advance."	SloanUser
18073	Regression: Tails shuts down after snapshot restore (on SATA optical drive)	VirtualBox 5.2.20	2018-10-23T17:42:58Z	2020-03-30T08:36:19Z	2020-03-30T08:36:19Z	"Tails thinks that the medium has been removed/changed and does it's emergency shutdown after restoring from a snapshot.

""cat /dev/sr0"" errors out and there are errors about failing to access sr0 in dmesg.

Steps:

1.: Configure the VM to have the ISO in a SATA/AHCI optical drive.

2.: Boot it and make a snapshot when it's done.

3.: Restore from the snapshot. The Guest VM will shut down.

Regression in r64134. Not fixed in trunk yet.

Caveat: Triggering the bug on e.g. 5.2.20 might require to set the Base Memory size to anything larger than 1024 MiB and the Video Memory size to anything larger than 16 MiB. (e.g. set the Base Memory size to 4096 MiB and the Video Memory size to 32 MiB.)

Affected: trunk, 5.2.x

Unaffected: 5.1.x. Older versions should be unaffected."	Christian Inci
19694	Failure reading data from .iso (optical drive) at random locations	VirtualBox 6.1.10	2020-07-02T11:29:26Z	2020-07-02T11:29:26Z	2020-07-02T11:29:26Z	"I'm trying to install CentOS 8 in a virtual machine, but the VM keeps getting bad data from the ISO file.

This results in the system getting stuck booting into the installer or crashes at the disk verification step at varying procentages.

I know the ISO itself is flawless, its sha256sum matches the specified hash from CentOS. 
To me it seems like VirtualBox is having issues with providing the OS/Kernel with the right data.

I've also tried installing it with VirtualBox 6.0.22 and 5.2.42, both having the same issue. (5.2.42 has some graphical glitches as well, but likely unrelated)

I'm running OS X 10.15.5 on a MacbookPro16,1

How to reproduce:
1. Make new VM in Virtualbox on OS X, with the iso CentOS-8.2.2004.x86_64-minimal.iso
2. Let it boot the iso
3. Very likely to fail, is not run it a second time or try to complete the installation

Let me know if there is any other information I can provide"	smiba
