Hi all.

I'm testing oVirt (it's new to me also) and create some VM with
nearly-all-default parameters.
(ovirt 4.2.7, with last updates)

I create one disk for VM (via webui) :
General -> create -> new image with default interface virtio-scsi (boot,
50 Gb size)
resource allocation - virtio-scsi enabled by default
IO threads enabled by default
I run it with cdrom+iso for install centos.

When i try to reboot it this VM can start or not can start with error
(one time start, next reboot - not start, sometimes after it start...)

[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]
(ForkJoinPool-1-worker-3) [] EVENT_ID: VM_DOWN_ERROR(119), VM test_rh1
is down with error. Exit message: Ошибка XML: Обнаружено нескол
ько контроллеров «scsi» с индексом «0».

(by the way , why errors are localised? it means  "Multiple 'scsi'
controllers with index '0'"

In engine log here is a config xml dump:

     <controller type="scsi" index="0">
       <address bus="0x00" domain="0x0000" function="0x0" slot="0x05"
type="pci"/>
     </controller>
      <controller type="scsi" model="virtio-scsi" index="0">
       <driver iothread="1"/>
       <alias name="ua-8d89c0be-523d-4e8f-8968-3658adcd6748"/>
     </controller>

It is really contain two controllers:

     <controller type="scsi" index="0">
     <controller type="scsi" model="virtio-scsi" index="0">

But I do NOT add two this controllers by hand!
And sometimes it can start! (without configuration change)

So there is a Question: How to workaround this and start the VM?
In "vm devices" I have two controllers:

virtio-scsi {ioThreadId=1}
scsi {type=pci, slot=0x05, bus=0x00, domain=0x0000, function=0x0 {index=0}

But all checkboxes are greyed

bug like in this list post:
https://lists.ovirt.org/pipermail/users/2018-February/086860.html

There is a "CLOSED" bugs about this
https://bugzilla.redhat.com/show_bug.cgi?id=1543833#c9
https://bugzilla.redhat.com/show_bug.cgi?id=1563769
https://bugzilla.redhat.com/show_bug.cgi?id=1535961


--
Mike
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