1. Ubuntu Mount Cdrom
2. Mount Cdrom Redhat

I was setting up some Windows virtual machines this evening on my Linux KVM/libvirt server, in order to experiment with how Windows handles IPv6 networks. Installing windows was easy enough – standard virt-install commands, however post-reboot, Windows XP wants to access the CDROM again.

In our case the cdrom drive is hdc, now lets eject the ISO thats currently attached to it. Virsh # change-media vm1 hdc -eject succeeded to complete action eject on media. Lets verify the ISO is no longer attached virsh # domblklist vm1 Target Source - hda /dev/storage1/vm1disk1 hdc - Looks good, the Source for hdc no longer contains the.

However the reboot causes the CDROM ISO to be unattached from the virtual CDROM drive – so it’s necessary to re-add it to continue installation However the logical syntax based on virsh help, doesn’t work: virsh # attach-disk devel-winxp1 /tmp/winxp.iso hdc error: Failed to attach disk error: this function is not supported by the connection driver: disk bus 'ide' cannot be hotplugged. The correct syntax is: virsh # attach-disk devel-winxp1 /tmp/winxp.iso hdc -type cdrom -mode readonly Disk attached successfully Basically you need to tell libvirt that you’re attaching a.cdrom. and not an actual disk – I’m not sure why it doesn’t just figure that out, based on the fact the user is trying to obviously attach an ISO to a virtual optical drive device – maybe nobody has gotten around to implementing a nice autodetect method yet.

Automatic “intelligence” can be a curse too, and sometimes you want to avoid, especially if the commands were mainly designed to be called from scripts. If you added automatic functionality like that (generally speaking) there’s always the risk that scripts will start behaving strangely. In a way this behavior makes perfect sense. The first command is perhaps analogous to disconnecting a physical optical drive (or hard drive or) and attaching a new one, just to change the disk, while the second one is analogous to just switching the disk in the drive.

Ubuntu Mount Cdrom

Mount Cdrom Redhat

I’m assuming that even the second line only works if the machine has been configured to have an optical drive on channel hdc before boot.

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