I'm running a Windows-7 host machine with Oracle Virtual-Box 4.1.18. I've created a guest OS - Ubuntu 11.10 in Virtual-Box for programming and testing. All things are working fine, however, except one nagging issue. Sometimes when I map my host DVD-ROM drive with the linux guest's DVD-ROM drive, for e.g. when installing software, packages, etc., after doing some work, the host DVD-drive actually disappears from the host! That means, the CD is there, but no longer shows up in my computer. From linux, it won't be accessed from /media/cdrom0. I have to restart the host to make things normal again.
Is this an expected behaviour or a known issue with Windows hosts? Any illumination will be appreciated. Thanks.