[libvirt-users] Unable to detach disk using 'virsh detach-disk'

[Michal Privoznik]

On 04/30/2018 05:48 PM, Andre Goree wrote:
> I'm unable to detach a disk from a Windows guest using the 'virsh
> detach-disk' command.
> 
> Even though 'domblklist' shows the disk attached, and on the FIRST
> iteration, it says the command "completed successfully," 'domblklist
> will still show the disk attached and subsequent 'detach-disk' commands
> fail with 'no disk found whose source path or target is ${location}'
> 
> 
> 
> ~ # virsh domblklist 31907-1063435
> Target     Source
> ------------------------------------------------
> vda        ${concatenated}/31907-1063435/2018-04-28-190529
> vdb        ${concatenated}/31907-67863/2018-03-21-033216.2018-04-28-190529
> 
> ~ # virsh detach-disk --domain 31907-1063435
> /var/lib/libvirt/images/instances/31907-67863/2018-03-21-033216.2018-04-28-190529
> --persistent
> error: No disk found whose source path or target is
> /var/lib/libvirt/images/instances/31907-67863/2018-03-21-033216.2018-04-28-190529
> 
> 
> 
> 
> Any ideas as to why this happens?
> 
> 

Sure. There's a difference between live and config XML

https://wiki.libvirt.org/page/VM_lifecycle

detach-disk --persistent removes disk from config XML and domblklist
prints out disks from current state of domain (i.e. if it's running it
prints out disks from live XML).

Michal