Open Stack

Hello,
    We run stein openstack in our environment. And already set libvirt
value in nova.conf
hw_machine_type=aarch64=virt
num_pcie_ports = 15

We test and find sometimes disks can not be attached correctly.
For example,
Built vm with 6 disks, only three disk be there. The others will be
inactive in virsh.
No obvious error can be found in nova-compute, libvirt, vm os logs.

libvirt:5.0.0
qemu:2.12.0-44
openstack-nova: 19.3.2
librbd1:ibrbd1-14.2.16-1.el7.aarch64

Any Suggestions?
Thanks a lot