VM paused during multipath iSCSI reservation

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Hi,
I'm trying to find the root cause for BZ #1898049 [1]. When setting up Windows HA 
cluster on Windows Server VMs run on top of oVirt, Windows cluster validator runs couple of tests 
and fails during test "Validate SCSI-3 Persistent Reservation" and one of the VMs of 
the cluster is paused with IO error. Disk definition is as follows:


    <disk type='block' device='lun' sgio='unfiltered' snapshot='no'>
      <driver name='qemu' type='raw' cache='none' error_policy='stop' io='native'/>
      <source dev='/dev/mapper/3600a09803830447a4f244c4657616f6f' index='1'>
        <seclabel model='dac' relabel='no'/>
        <reservations managed='yes'>
          <source type='unix' path='/var/lib/libvirt/qemu/domain-1-Windows-2016-2/pr-helper0.sock' mode='client'/>
        </reservations>
      </source>
      <backingStore/>
      <target dev='sdb' bus='scsi'/>
      <shareable/>
      <alias name='ua-26b4975e-e1d4-4e27-b2c6-2ea0894a571b'/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </disk>

and libvirt error I get is bellow [2].

When I try to create reservation from Windows VM manually, I get following error
(but not sure I do it whole process correctly):

.\sg_persist --out --register --param-sark=123abc e:
    QEMU   QEMU HARDDISK               2.5+
    Peripheral device type: disk
PR out (Register): command not supported
sg_persist failed: Illegal request, Invalid opcode


Do you have any ideas what could be wrong or how to determine
the root cause of this this issue?

Thanks in advance.
Vojta


[1] https://bugzilla.redhat.com/1898049
[2] libvirt debug log:

2021-10-12 11:43:25.148+0000: 2006427: debug : qemuMonitorEmitIOError:1243 : mon=0x7fb02006a020
2021-10-12 11:43:25.148+0000: 2006427: info : virObjectRef:402 : OBJECT_REF: obj=0x7fb02006a020
2021-10-12 11:43:25.148+0000: 2006427: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd0130020
2021-10-12 11:43:25.148+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd010d340
2021-10-12 11:43:25.148+0000: 2006427: info : virObjectNew:258 : OBJECT_NEW: obj=0x7fb020082590 classname=virDomainEventIOError
2021-10-12 11:43:25.148+0000: 2000208: info : vir_object_finalize:321 : OBJECT_DISPOSE: obj=0x7fb020082500
2021-10-12 11:43:25.148+0000: 2006427: info : virObjectNew:258 : OBJECT_NEW: obj=0x7fb020082620 classname=virDomainEventIOError
2021-10-12 11:43:25.148+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb020082500
2021-10-12 11:43:25.148+0000: 2006427: debug : qemuProcessHandleIOError:907 : Transitioned guest Windows-2016-2 to paused state due to IO error
2021-10-12 11:43:25.148+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fafd010d340
2021-10-12 11:43:25.148+0000: 2006427: info : virObjectNew:258 : OBJECT_NEW: obj=0x7fafbc1fb8c0 classname=virDomainEventLifecycle
2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockProcessPause:204 : plugin=0x7fafd01272a0 dom=0x7fb01400f5e0 state=0x7fb02401d768
2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockManagerNew:134 : plugin=0x7fafd01272a0 dom=0x7fb01400f5e0 withResources=1
2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerPluginGetDriver:276 : plugin=0x7fafd01272a0
2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerNew:300 : driver=0x7fafd444a000 type=0 nparams=5 params=0x7fafd77de640 flags=0x0
2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:97 :   key=uuid type=uuid value=70eee88c-ba2c-4c6c-bd51-c2b663db27f8
2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:90 :   key=name type=string value=Windows-2016-2
2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:78 :   key=id type=uint value=1
2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:78 :   key=pid type=uint value=2006418
2021-10-12 11:43:25.148+0000: 2006427: debug : virLockManagerLogParams:93 :   key=uri type=cstring value=(null)
2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockManagerNew:146 : Adding leases
2021-10-12 11:43:25.148+0000: 2006427: debug : virDomainLockManagerNew:151 : Adding disks
2021-10-12 11:43:25.149+0000: 2006427: debug : virDomainLockManagerAddImage:90 : Add disk /rhev/data-center/mnt/blockSD/7c4f09b6-9e87-436f-bda9-22d1f0b50955/images/f5d6e074-dfe9-462d-8cfd-3e14b0eb5aea/766e36b2-84a6-43e7-a48b-a5f47e669860
2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerAddResource:326 : lock=0x7fafbc19e250 type=0 name=/rhev/data-center/mnt/blockSD/7c4f09b6-9e87-436f-bda9-22d1f0b50955/images/f5d6e074-dfe9-462d-8cfd-3e14b0eb5aea/766e36b2-84a6-43e7-a48b-a5f47e669860 nparams=0 params=(nil) flags=0x0
2021-10-12 11:43:25.149+0000: 2006427: debug : virDomainLockManagerAddImage:90 : Add disk /dev/mapper/3600a09803830447a4f244c4657616f6f
2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerAddResource:326 : lock=0x7fafbc19e250 type=0 name=/dev/mapper/3600a09803830447a4f244c4657616f6f nparams=0 params=(nil) flags=0x2
2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerRelease:359 : lock=0x7fafbc19e250 state=0x7fb02401d768 flags=0x0
2021-10-12 11:43:25.149+0000: 2006427: debug : virLockManagerFree:381 : lock=0x7fafbc19e250
2021-10-12 11:43:25.149+0000: 2006427: debug : qemuProcessHandleIOError:920 : Preserving lock state '<null>'
2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fafd0130020
2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb02006a020
2021-10-12 11:43:25.150+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd010d340
2021-10-12 11:43:25.150+0000: 2000208: info : vir_object_finalize:321 : OBJECT_DISPOSE: obj=0x7fb020082590
2021-10-12 11:43:25.150+0000: 2006427: info : virObjectRef:402 : OBJECT_REF: obj=0x7fb02006a020
2021-10-12 11:43:25.150+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb020082590
2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb02006a020
2021-10-12 11:43:25.150+0000: 2000208: info : virObjectNew:258 : OBJECT_NEW: obj=0x564a89a4cc60 classname=virDomain
2021-10-12 11:43:25.150+0000: 2006427: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x7fb02006a020
2021-10-12 11:43:25.150+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x7fafd0018ca0
2021-10-12 11:43:25.150+0000: 2000208: info : virObjectRef:402 : OBJECT_REF: obj=0x564a89978df0
2021-10-12 11:43:25.150+0000: 2000208: debug : virAccessManagerCheckDomain:238 : manager=0x564a89978df0(name=stack) driver=QEMU domain=0x7ffd2c677010 perm=0
2021-10-12 11:43:25.150+0000: 2000208: debug : virAccessManagerCheckDomain:238 : manager=0x564a89978e50(name=none) driver=QEMU domain=0x7ffd2c677010 perm=0
2021-10-12 11:43:25.150+0000: 2000208: info : virObjectUnref:380 : OBJECT_UNREF: obj=0x564a89978df0
2021-10-12 11:43:25.150+0000: 2000208: debug : remoteRelayDomainEventIOErrorReason:529 : Relaying domain io error Windows-2016-2 1 /dev/mapper/3600a09803830447a4f244c4657616f6f ua-26b4975e-e1d4-4e27-b2c6-2ea0894a571b 1 , callback 3

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