Hi, versions 2.5 and 2.11 are quite old (though version 2.10 fixed the
bug mentioned in the Red Hat BZ, so I think this might be a different
bug.)
It's not clear at what step this is failing or where you are seeing the error
message, so:
1. What is your full command line for QEMU?
2. Do you see this error message when migrating? If so, what does the
destination QEMU command line look like?
3. Does the problem reproduce on a currently-supported upstream QEMU? (4.1.1,
4.2.0)
** Changed in: qemu
Status: New => Incomplete
** Changed in: qemu
Assignee: (unassigned) => John Snow (jnsnow)
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https://bugs.launchpad.net/bugs/1816805
Title:
Cannot create cdrom device with open tray and cache option
Status in QEMU:
Incomplete
Bug description:
When trying to create cdrom device with open tray and either of
"cache" or "discard" options specified, I get the following error:
qemu-system-x86_64: -drive if=none,id=drive-
ide0-0-0,readonly=on,cache=writeback,discard=unmap,throttling.iops-
total=900: Must specify either driver or file
This bug essentially forbids live migration of VMs with open cdrom
trays.
I was able to find the same bug at RedHat:
https://bugzilla.redhat.com/show_bug.cgi?id=1338638
The bug was encountered in versions 2.5 and 2.11.
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