> My understanding is that this is the expected behavior. The reason is that the drive cannot be deleted immediately when the device is hot- unplugged, since it might not be safe (other parts of QEMU could be using it, like background block jobs).
> On the other hand, the fact that if the drive is removed explicitly through QMP (or in the monitor with drive_del), the drive id is remains "in use". This might be a completely different bug that is unrelated to the nvme device. using the same commands I can hot-plug and hot-unplug a scsi disk like this without issue - this behavior only appeared on nvme devices. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1925496 Title: nvme disk cannot be hotplugged after removal Status in QEMU: Confirmed Bug description: Hello, When I try to re-add an nvme disk shortly after removing it, I get an error about duplicate ID. See the following commands to reproduce. This happens consistently on all VMs that I tested: attach ========== $VAR1 = { 'arguments' => { 'command-line' => 'drive_add auto "file=/dev/zvol/rpool/data/vm-20000-disk-1,if=none,id=drive-nvme1,format=raw,cache=none,aio=native,detect-zeroes=on"' }, 'execute' => 'human-monitor-command' }; $VAR1 = { 'execute' => 'device_add', 'arguments' => { 'serial' => 'nvme1', 'drive' => 'drive-nvme1', 'driver' => 'nvme', 'id' => 'nvme1' } }; detach =========== $VAR1 = { 'arguments' => { 'id' => 'nvme1' }, 'execute' => 'device_del' }; $VAR1 = { 'execute' => 'human-monitor-command', 'arguments' => { 'command-line' => 'drive_del drive-nvme1' } }; reattach =========== $VAR1 = { 'arguments' => { 'command-line' => 'drive_add auto "file=/dev/zvol/rpool/data/vm-20000-disk-1,if=none,id=drive-nvme1,format=raw,cache=none,aio=native,detect-zeroes=on"' }, 'execute' => 'human-monitor-command' }; and I get: "Duplicate ID 'drive-nvme1' for drive" although it does not show up in query-block or query-pci anymore after the first detach. Is this a bug or am I missing something? Please advise. Best regards, Oguz To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1925496/+subscriptions
