Virtual SCSI-attached CD/DVD drives

7.1 KVM guest

The KVM hypervisor might provide virtual SCSI-attached CD/DVD drives to your KVM guest.

Virtual SCSI-attached CD/DVD drives have device nodes of the form /dev/sr<n>, where <n> is an integer that identifies an individual device. The node for the first drive is /dev/sr0.

Issue the following command to list all device nodes for CD/DVD drives:

# ls /dev/sr*

You can also use the lsscsi command to list all your SCSI-attached devices, including SCSI-attached CD/DVD drives.

# lsscsi 
[0:0:0:0]    cd/dvd  QEMU     QEMU CD-ROM      2.3.  /dev/sr0

You can use the isoinfo command with the -i option to find out if a drive contains media.

Example:

# isoinfo -i /dev/sr0

This command returns an error if no media is present.

You can use the mount command to mount the content of media in the drive on the file system.

Example:

# mount /dev/sr0 /mnt/media

Your distribution might provide a udev rule to mount the media content for you.

Unmount the content of the media to release it.

Example:

# unmount /dev/sr0

You depend on the KVM hypervisor to eject and insert media.