What were you trying to do that didn't work?

Guest startup failed when using a block LUN disk backed by an LVM volume with rawio disabled

Please provide the package NVR for which bug is seen:

libvirt-11.2.0-1.el10.x86_64
qemu-kvm-9.1.0-17.el10.x86_64

How reproducible:

100%

Steps to reproduce

1. Prepare a lvm disk.

# modprobe scsi_debug dev_size_mb=200

# vgcreate vg0 /dev/sdb

# lvcreate -L 100M -n lv0 vg0

2. Prepare a disk xml with rawio='no'.

# virsh dumpxml avocado-vt-vm1 --xpath //disk
......
<disk type="block" device="lun" rawio="no">
  <driver name="qemu" type="raw"/>
  <source dev="/dev/vg0/lv0"/>
  <target dev="sdb" bus="scsi"/>
  <address type="drive" controller="0" bus="0" target="0" unit="1"/>
</disk>

3. Start the guest.

# virsh start avocado-vt-vm1
error: Failed to start domain 'avocado-vt-vm1'
error: internal error: QEMU unexpectedly closed the monitor (vm='avocado-vt-vm1'): 2025-04-08T01:48:14.877520Z qemu-kvm: -device {"driver":"scsi-block","bus":"scsi0.0","channel":0,"scsi-id":0,"lun":1,"drive":"libvirt-1-storage","id":"scsi0-0-0-1"}: cannot get SG_IO version number: Inappropriate ioctl for device
Is this a SCSI device?

Expected results

Can start the guest.

Actual results

Failed to start the guest.
 
Additional info
1. Can start the guest with rawio="yes".
2. Can start the guest with <source dev="/dev/sdb"/> and rawio="no".