# Pastebin IZbgf13U
$ sudo qemu-img check /var/lib/nova/instances/07f14d51-60a2-4b78-8181-ac40c32cf45c/disk
qemu-img: Could not open '/var/lib/nova/instances/07f14d51-60a2-4b78-8181-ac40c32cf45c/disk': Failed to get shared "write" lock
Is another process using the image [/var/lib/nova/instances/07f14d51-60a2-4b78-8181-ac40c32cf45c/disk]?